Tag Archives: bluetooth

audio, mobile, reviews

A nearly perfect boombox: take your audio on the road with TDK’s Trek Max

I first heard the Trek Max at a busy press exhibition; audio rarely sounds good in big noisy rooms but I was struck by the fact that this TDK device was not dreadful but made a valiant attempt to deliver the music: there was at least a little bass, there was volume, there was clarity, and this from a small box, 24 x 5 x 10cm to be precise.

image

I asked for one on loan to review and it has not disappointed. There is not much in the box, just the Bluetooth speaker, a power supply/charger, and some mostly useless bits of paper.

image

The hardest task was getting that sticker off the front without leaving a gooey mark. Having done that to the best of my ability, I charged the unit, and paired with a phone. My attempt to use NFC (one-touch Bluetooth connect) failed with a Windows Phone, but worked with an Android tablet. It is no big deal; pairing is straightforward with or without NFC.

Then I played some music. I put on Santana Abraxas; this thing boogies, and does a great job with the complex percussion and propulsive guitar. I played Adele’s 21; it sounds like Adele singing, not the squawky sound you might expect from a device this size, and the drums on Don’t You Remember have a satisfying thud. I played Beethoven’s Third Symphony; the drama and power of the opening movement came over convincingly, albeit in miniature form.

I am not going to pretend that this is the best Bluetooth speaker I have heard; it has tough competition at much higher prices. I do not judge a thing like this versus a home audio setup or a larger Bluetooth speaker that is only semi-portable. This is something to take with you, and even sports a “weatherized” case; the manual makes clear that it is “splash-resistant” rather than anything more serious, and then only if you make sure to close the rubber flap over the panel on the right-hand side, but still a handy feature.

Any clever tricks? Just a couple. One is that you can use the Trek Max as a battery charger for your mobile phone (or any device compatible with USB power). Here is that side panel in detail:

image

From right to left, there is the USB power output (it has no other function), an AUX in for a wired audio connection, power in, and a master power switch which turns the entire unit off (including the USB power output).

The other party trick is the ability to work as a speakerphone. You are grooving along to music from your mobile, and an incoming call comes in. The music stops and a call button on the top illuminates. Press to answer, take the call hands-free, and press twice to end it. Neat.

image

Note that the Trek Max is surprisingly heavy for its size, around 1.25Kg. It does not surprise me; there is a lot packed in, including a decent battery.

The speaker configuration is right, left, central woofer for the (mono-ed) lower frequencies, and passive bass radiators at the back, boosting the bass.

It is worth noting that the Trek Max goes surprisingly loud – louder than I have heard before from a device of this size. That is important if you are outside or in a noisy room – but please do not annoy others too much!

The Trek Max  A34 replaces the Trek A33. What is the difference? Primarily, NFC Bluetooth pairing, pause, resume, forward and back buttons (they work fine), and better sync with iOS devices: on these, the volume control on the Apple device directly controls the volume on the Trek, whereas on other devices the volume controls are independent.

Conclusion: a great little device, and make sure you hear it before dismissing it as too pricey for something of this size.

Specifications

Weight: 1.25 Kg
Size: 24.1 x 9.8 x 5cm
Power output: 15w total
Bluetooth: 2.1 + EDR, A2DP, HFP, HSP, AVRCP
Battery life: 8 hours

audio, reviews

Review: Velodyne vFree wireless headphones

Last month I took a look at Velodyne’s vLeve headphones. Now it is time to look at the similarly-styled vFree, a wireless model which sits a bit higher in the Velodyne range. The range, incidentally, looks like this, though the prices (taken from the Velodyne site) are the most you can pay and you will likely do quite a bit better.

  • vLeve on-ear headphones $199
  • vFree on-ear Bluetooth headphones $299
  • vQuiet over-ear noise cancelling Headphones $299
  • vBold over-ear Bluetooth headphones $349
  • vTrue Studio over-ear headphones $399

image

In the smart glossy box you get the headphones, soft bag, cables for USB charging and for a wired audio connection (no microphone when wired), and a leaflet with a guide to pairing.

image

There is no charger; you can use the USB port on a PC or one of the many USB chargers you likely have already.

image

The headphones fold for portability and have various ports, LEDs and buttons. Under the left cup, you will find a battery status LED, the USB charging port, and a socket for wired audio.

The right cup sports most of the functions. There is volume up/down on the edge, and an LED function indicator and microphone on the bottom. The back of the cup is split to form three large buttons, one for Next/Previous, one for power and pairing, and one for play/pause/answer/end call.

Controls on on-ear devices always tend to be awkward, because you cannot see what you are doing. I like the generous size of the vFree controls, but finding which button to press is still tricky at first.

Pairing is a matter of holding down power until the device enters pairing mode. Fairly straightforward, though in my experience some devices pair more easily than others, and there is no clarity about whether you can pair to multiple devices. I believe you can, because the Nexus was able to reconnect after I paired to the Surface, but I had trouble the other way around and had to re-pair. The function LED is rather dim and hard to see.

The sound

You could say that the vFree is “like the vLeve but wireless”, but although the looks are similar they do not sound the same. Further, bear in mind that a wireless headset contains its own amplifier whereas with a wired set you are dependent on whatever comes with your device.

Perhaps for this reason, I found that the vFree sounded substantially different in the various configurations I tried. The best sound I got was when wired (there is a wired option using the supplied cable) and using a dedicated headphone amplifier: this gave rich bass, clean, clear and spacious sound.

Yet on the two mobile devices I tried, a Surface tablet and a Google Nexus tablet, the vFree sounded better wireless than wired. In fact, the wired option sounded bad in comparison, thinner and slightly distorted.

There is a logic behind this. Mobile devices often have poor audio amplifiers, and when you listen wired, that is what you get. In addition, I found with both these and with the vLeve that they are more than usually sensitive to amplifier quality. With the wireless option though, you are using the built-in amplifier that is specifically designed for the speakers in the vFree. Against that though, wired is a better electrical connection than Bluetooth, so it is a trade-off. Another factor is whether your mobile device supports the higher quality apt-x codec over Bluetooth; many do not, though the vFree does support it.

All of this makes it hard to state definitively how the vFree sounds; it will depend on your set-up. At their best they sound very good, though I doubt wired use with a dedicated amplifier will form typical usage for most. In the other configurations, I found them decent but not outstanding. The bass is particularly clean and tuneful, as you might expect from a supplier of sub-woofers, and the sound in general is refined, never brash or harsh, but lacking the spaciousness that characterises the very best audio.

Comfort is a personal thing; I found the vFree fine for an hour or two but would not want to wear them for longer; but they are soft and lightweight.

These are high quality headphones, though not good value at the full price listed on the Velodyne site. Fortunately you can get them elsewhere for considerably less, making them worth consideration.

Specifications

  • Frequency response: 20Hz – 20kHz
  • Impedance: 32 Ω
  • Range: Up to 10m
  • Sensitivity: 98 dB/1 kHz/1mW
  • Codecs: SBC, AAC, apt-X
  • Battery life: 100 hours standby, 10 hours talk and music, 1.5 hours recharge time
gadgets, gaming, mobile, reviews

Review: Turtle Beach z300 headset. Super flexible, shame about the sound

The Turtle Beach Z300 is a super flexible gaming headset, with wired and wireless connections, Dolby 7.1 virtual surround sound, and extra features like switchable dynamic range compression. It is primarily for PC gaming, but also works with Mac (no Dolby surround) and with any Bluetooth-compatible device – which means almost any smartphone or tablet. You can also use the wire to plug it into any device with a 3.5mm audio jack.

image

In the box you get the headset, detachable microphone, USB cable, jack cable, USB transceiver, and some documents including a note about having to download the Dolby 7.1 drivers. I still recommend downloading the online manual, which is more detailed than anything in the box.

image

A few more details on the three ways to connect:

Wireless via a USB transceiver. This is the preferred method for a PC. The USB transceiver is pre-paired and indicates via an LED whether or not the headset is connected.

Traditional wire. A jack cable is supplied which connects to the left earcup and has a standard four-way 3.5mm jack on the other end, suitable for a phone or tablet. In wired mode you still need to charge the headset and have it powered on.

Bluetooth. You can pair with up to two devices. The right earcup has Bluetooth volume controls, and a Bluetooth button for answering, rejecting and ending calls.

The actual headset seems sturdily made and features a fabric-covered headband and earpads. The material feels slightly coarse at first, and the earcups are slightly on the small side, but in practice I found the comfort reasonable.

The microphone is on a flexible boom and is detachable. You can also swing it up above the left earcup to get it out of the way.

You charge the Z300 via a mini USB port on the right earcup, which annoyingly is the old type, not the slightly smaller one now found on most phones and tablets. A cable is supplied, though it is too short to reach from the floor to your headset if you are wearing it, and in my case too short even to reach from the front panel of my PC. You might want to get a longer cable if you expect to charge while wearing. Play time is specified at 15 hours.

An annoyance: there is no indication of remaining charge.

How about the other controls? There are several:

Power on/off on the left earcup and easy to find by feel. The headset automatically powers off after 5 minutes of inactivity.

Master volume on left earcup.

Mic monitor volume on left earcup. This controls how much sound from the mic is fed back to your. It does not affect the volume heard on the other side.

Tone on left earcup: cycles through 4 “game modes”. These are Flat, Bass boost, Treble boost, and Bass and Treble boost. I generally used the Flat mode for this review.

Dynamic Range Compression on left earcup: raises the volume of quiet sounds. The effect seems minimal to me.

Bluetooth controls on right earcup: as mentioned above.

If you use the USB transceiver and a Windows PC you can insteall a Dolby 7.1 driver. Note: these are stereo headphones, but when used with this driver they support Dolby’s virtual surround system. You enable this by going into the Windows sound properties dialog (eg right-click the speaker icon and choose Playback Devices), then showing the properties dialog for the Turtle Beach speakers. A surround sound tab then lets you enable “Dolby Headphone”. You can also choose between two modes: Music or Movie.

image

Enabling Dolby Headphone makes a substantial difference to the sound. It is distinctly louder, and the sound seems to fill out more. On games with true surround sound, the virtual sound should mean that you get spatial clues about the source of an explosion or footstep, for example, though you need to make sure the game is set to output in surround sound.

I tried this and reckon it works a bit. It is not as good as a headset I tried that really did have multiple speakers. My big gripe though is that if you enable Dolby Headphone, it messes up true stereo, for example on music. You no longer hear the mix as intended.

This would not matter too much if it were easy to switch Dolby Headphone on and off, but it is a hassle to go into Windows sound controls every time. I would like to see more effort go into usability.

How about the sound quality? Here is my second big gripe about this headset. The sound is not great, with anaemic bass and a nothing special in the mid-range or treble. For gaming it is not too bad, and I did find the audio atmospheric if you can live without much bass thunder, but for music they are not good enough.

The microphone quality is fine. I tried the headset with Dragon Dictate, just to check the quality, and got high accuracy of transcription which is a good sign.

In summary, the flexibility is exceptional, the build quality is fine, but the sound is lacking. Personally I would not use these as my main headset because I do both gaming and music listening; but if your main use is gaming they would be OK.

Price is around $170 or £170 (better value in the USA it seems).

laptops, windows

Fixing a slow Lenovo laptop

3 Comments

Here is a problem I’ve not seen before. A Lenovo Thinkpad E530 laptop running Windows 7, which after working fine for months developed a critical problem. On start up the user would see the network icon in the notification area (bottom right) show a busy icon or a red cross. No network connectivity, and the machine almost unusable.

After around 20 to 25 minutes the network sprang into life and everything was fine, until the next reboot when the problem repeated.

I fixed several errors in the event log to no avail. The problem persisted.

Went into msconfig and did the usual trick of disabling all non-Microsoft services and startup items. Everything worked fine. Laptop booted quickly and connected to the network.

What was the culprit? Trial, error and instinct eventually narrowed it down to an Intel service: Bluetooth Device Monitor. If enabled, 25 minute boot. If disabled, two minute boot.

I updated the Intel Bluetooth driver, a substantial 300MB download. This fixed it. I noticed that the updated Bluetooth Device Monitor now says it is from Motorola:

image

I understand it was always provided by Motorola but previously signed by Intel.

Posted here in case others run into this issue.

Update: this seems to be a common problem. It seems that a recent Microsoft update is incompatible with some versions of the Bluetooth driver. See here for discussion on the HP support forums, where it has occurred with the HP Probook 4540s and others.

As noted in the comments, I used Lenovo’s system update utility to grab the more recent “Motorola” driver. It shows there as an optional update.

mobile, reviews

Review: Bayan Audio Soundbook Bluetooth dock

The Bayan Audio Soundbook is a portable wireless speaker system for your smartphone, MP3 player, tablet or laptop. Oh yes, and an FM radio too.

image

It measures 160 x 88 x 38 mm –  chunky for a portable unit, and at 530g not that light, though heavy is often good when it comes to audio. Not something for a pocket or small handbag, but fine to tuck in your case.

image

The unit feels solid and has an unusual design. The front flaps down and folds back to make a stand, and the action of opening it also switches the device on. Hence the Soundbook name: open and play.

image

This is a Bluetooth 4.0 device, and supports A2DP and aptX for high quality audio. Pairing your smartphone is a snap, with no codes involved. It also supports NFC (Near Field Communications), which worked well using a couple of Android devices I tried, a Nexus 7 tablet and a Sony Xperia phone. Just tap against the NFC logo on the underside of the flap, and a dialog appears to confirm the connection.

The Soundbook, in combination with your mobile, is also a speakerphone. There is a built-in microphone, and it behaves like a Bluetooth headset, pausing the music to let you take a call and resuming afterwards.

image

You can also connect without Bluetooth, using an input on the rear. Finally, there is an output jack socket so you can use the Soundbook as a wireless input to your hi-fi.

Battery life is up to 10 hours for radio or wired connections, shorter if you are using Bluetooth.

The USB power connector is the Mini-B type. A shame that Bayan did not choose the Micro-B standard which is now more common.

So how is it? It seems a lot of thought has gone into the design and the flexibility is impressive. The actual sound quality though is only so-so, thanks to the small 1″ internal speakers, and lacking in bass despite a 2″ passive bass radiator. It is stereo, though you will not notice unless you are very close and I wonder if Bayan should have borrowed an idea from Logitech’s excellent Squeezebox or UE Radio, and gone for mono. At maximum volume it is pretty loud though rather strident.

Still, this is all a matter of expectations. It is miles better than the tinny speaker built into your smartphone or tablet, and the speakerphone feature is useful.

The FM radio is not too good unless, perhaps, you are particularly close to the transmitter. Bayan says there is “an advanced integrated FM antenna” but in practice I found it difficult to get decent reception other than for a couple of local stations, and even then only after careful placement. There are no presets; you have to press and hold tune up and tune down buttons to scan for channels, which is inconvenient.

You cannot switch between Bluetooth sources other than by disconnecting the current source in order to connect another. However, it will remember up to 4 pairings at a time.

Pros and cons

The Bayan Soundbook is nicely designed and supremely flexible. I particularly like the speakerphone capability, which means you can stick this on your desk, enjoy the music, but still take hands-free calls.

That said, if this is a device for a desk, Bayan should have made it a bit larger and bumped up the sound quality.

This is best for portable use then, for which it is not bad, though a little bulky and heavy. I could more easily forgive that if the sound quality were just a bit better.

gadgets, software, windows

A big ball of Bluetooth at Microsoft Build

At Microsoft’s Build developer conference in San Francisco the company is showing off new features of Windows 8.1, now in preview, a major update to Windows 8.0.

image

In a session on the Windows Runtime, the platform behind the tablet platform in Windows 8, there was a dramatic moment when a huge black ball rumbled onto the stage and threatened to destroy the “Lemonade stand” which the presenters were using to showcase how a very small business might use Windows 8.

The significance of the ball (a custom Sphero) is that Windows 8.1 has Bluetooth APIs built in, so that app developers can easily control a Bluetooth device from code.

Robotics is an obvious application, but with increasing numbers of Bluetooth devices out there, this is a smart move by Microsoft.

apple, audio, mobile, reviews, smartphones, tablets

Review: Three-in-one Jabra Revo headphones and headset: wired, wireless and USB

If headphones are judged on versatility, the Jabra Revo wins the prize. It works wired and wireless, it’s a USB audio device, it’s a headset with remote control, and as a final flourish it folds into a moderately compact size that you can slip in the supplied bag.

image

You might think that the result of this flexibility would be a fiddly and complex device, but this is not the case. The Revo has an elegant design and looks modern and sleek. The construction feels high quality as well; these headphones are lovely to handle.

In the solid plastic box you get the headphones, a drawstring bag, a USB cable, an audio cable (with four connectors on each 3.5mm jack, suitable for a headset connection to a mobile phone or tablet. The cables are braided for tangle-free connections, and bright orange so you will not miss them.

image

There is also a “Getting started” leaflet which I recommend you read, since not everything is obvious.

Step one is to charge the headphones. This is done using the USB cable. No charger is supplied, but you probably have a few of these already, or you can plug into any PC or Mac. A red light comes on while charging, and turns off when charging is complete, which takes about two hours from flat.

Step two is to pair the headphones with your mobile device. For this you can put a three-way on/off/pairing switch, tucked under the right-hand earphone, into the pairing position, for pairing in the normal way. Alternatively, just put it to the On position, and touch an NFC-enabled device to the left earphone (as I noted, not everything is obvious). This should then pair automatically, subject to a prompt on your mobile device.

I had mixed success with NFC. A Sony Xperia T smartphone failed twice, with a message “Could not pair Jabra Revo”, but worked on the third attempt. A Nokia Lumia 620 worked on the second attempt.

More than one device can be connected simultaneously, though only one at a time will play. I found this worked; I could play music on one device, then press play on another device and it automatically switched.

The good news is that Bluetooth audio worked well for me, with no skips or stutters, perhaps thanks to Jabra’s long experience with mobile communications. Volume was low to begin with, but note that the back of the right-hand earphone is also a touch volume control, and with a few strokes you can get more than enough volume.

There are also buttons at the centre of each earphone.

The right-hand button is multi-function, and does play/pause, or answer/end call, or reject a call if you hold it down, or redial last number if you double-tap.

The left-hand button is for the Jabra Sound App for iOS or Android. It is meant to launch the app, but this did not work for me with the Sony Xperia.

If you want to use the headphones wired, just plug the audio cable into the headphones. No battery power is required. If you want to use them as a USB device, attach the USB cable to a computer, wait for the drivers to install, and it works. I tried it with Skype and got reasonable results, though the microphone quality is less good than that of the headphones.

Jabra Sound app

If you have an Apple iOS or Google Android device, you can download the Jabra Sound app. This is a music player which claims to optimise sound for the headphones. The app is free but requires a code, supplied with the headphones, to activate it.

Using the app, you specify which Jabra headphones you are using. Next, you can set Dolby Processing, Mobile Surround, and Equalisation. If you turn Dolby Processing off, the other options are disabled as well.

image

I am a sceptic when it comes to this kind of processing, and the Jabra Sound app did nothing to convince me that it is worthwhile. I listened to I.G.Y. by Donald Fagen, which is a well-recorded track, and found that adding “Mobile Surround” made it noticeably worse, less natural and less clear. The equalizer could be useful though, particularly as the Revo are not the most neutral headphones I have heard.

image

Jabra Sound is a music player and only works with local music files. You cannot use it with Spotify or Google Play or other streaming services.

Revo in use

The comfort of these on-ear headphones is good, though tastes vary and I found them just a little stiff. Then again, wireless implies mobility and a firm fit is no bad thing.

How about the sound? There are a couple of points to note. First, all connections are not equal. I found that the wired connection sounds best, followed by the USB connection, followed by the wireless connection. That does not mean that wireless sounds bad, but I did find it slightly grainy in comparison. Only slightly; if you think Bluetooth audio means low quality sound, think again.

Second, the Revo seems to accentuate the bass, a little too much for my taste. This may be good marketing as many people seem to prefer this kind of sound, but if you want to hear what the mastering engineer intended you may prefer a more neutral sound.

These points aside, the sound is sweet, clear and refined. They are not reference quality, being easily bettered by, say, high-end Sennheisers, Judged purely on the basis of sound quality for the price, the Revo is nothing special. On the other hand, this is a bundle of smart technology, considering that it is also a wireless headset with a built-in touch volume control. This makes it hard to make a fair comparison. Given the capabilities of the product overall, the sound quality is decent.

I have mixed feelings about the touch controls. The ability to control volume and skip music tracks using taps and strokes is elegant, but inevitably there is more scope for mis-taps than with conventional buttons, and I found the volume control imprecise. That said, it is great to have volume and play/pause on the headphones themselves.

Conclusion

The Revo has a lot going for it. Elegant design, high quality construction, good wireless performance without any skips or stutters, and unmatched flexibility – remember, this is a headset that you can use for phone calls as well as for enjoying music.

On the negative side, the tonality is a little bass-heavy and the sound quality good but no better than it should be considering the premium price.

If the flexibility is something you can make use of, the Revo is a strong contender.

Specifications:

Driver size 40mm
Impedance 32 Ohm
Frequency response (no tolerance given) 20Hz – 20,000Hz
Sensitivity 119 dB at 1v/1kHz
Weight 240g
Battery life 12 hours playback/10 days standby
Charge time 2 hours
Wireless range 10m

 

apple, mobile, reviews, tablets, windows

Review: Logitech K811 Bluetooth Easy-Switch keyboard for iPad, Mac and more

I travel a lot and use a tablet rather than a laptop, and have gone through numerous Bluetooth keyboards. These are a necessity for me, since the tablet I use is either an iPad, which has no USB slot for a wireless transceiver, or a Windows slate that has only one USB slot that is often occupied.

It is surprising how much can go wrong. Some of the issues I have had (NOT with this keyboard let me emphasise) are keyboards turning themselves on in your bag and performing random actions; keys physically coming off the keyboard while in your bag; and tedious reconnection attempts when the Bluetooth pairing somehow breaks.
Another annoyance is that most Bluetooth keyboards can only pair with one device, forcing you to re-pair every time you switch.

image

Not any more. Logitech’s K811 keyboard can be paired with up to three devices simultaneously. The first three function keys across the top of the keyboard select which one you want to use.

image

This keyboard is designed for iPad, iPhone or Mac, but I found it also worked fine with the Windows tablet subject to few annoyances (keys that are incorrectly marked).

Specifically, on Windows all the alphabetic keys work correctly, as do the numbers, and most of the special characters. The main issues are that backslash types # but can be found on the § key, and @ and ” are transposed. No Windows key of course, but Ctrl-Esc works. Really not too bad.

Note that there is a PC version of the keyboard, called the K810, which seems similar but is a little cheaper. So get that if you only have PCs, but if you have a mix of devices, the Apple one is fine.

While the keyboard is probably not a good choice if you only use a non-Apple tablet, if you have a mix then it can still be useful.

image

This is a standard Mac keyboard though too small to have a separate numeric pad. The function keys default to the special functions, like dimming the backlight, and you have to press the Fn key to get the standard functions.

Physically the keyboard feels sturdy and well-made though it can flex just slightly in the middle since it has four small rubber feet. This did not cause me any problems. The keyboard is big enough for typing at speed and in comfort, and small enough that it tucks easily into most bags. It is 29cm on the longest side.

image

There are some little details that I like. The Connect button can be depressed easily with a finger, no need to find a small pointed object, though I have never pressed it accidentally. There is an on-off switch that is unlikely to slide by accident, avoiding those bag-typing problems mentioned above.

The keyboard has a built-in, non-replaceable rechargeable battery, charged via a USB cable. Battery life is said to be 20 hours of typing with the backlight on, or an impressive one year with the backlight off. You can adjust the brightness of the backlight using the function keys, though it resets when you next switch off and on, so you will probably end up with the backlight on most of the time, though it does dim automatically if you do not type for a while.

The coolest feature is a sensor that detects your hands and turns the backlight on, if the keyboard has been idle, before your hands touch the keys. A bit of a gimmick, but you can’t help admiring it.

Bluetooth switching really does work. I tried a test with an iPad and a Windows tablet. Press the key for the 1st device, and typed text appears on the iPad. Press the key for the 2nd device, and typed text appears on the Windows tablet. Reconnection seems quicker than average.

image

Overall I love the keyboard, and recommend it. I would have liked a protective bag to help prevent damage to the keys when loose in a larger bag, and suggest care with this as it is a common problem.

If you just want a keyboard for an iPad, you might be better off with one of the Logitech keyboard covers. If you have several mobile devices though, this is great, with a quality and convenience that justifies its price.

   

audio, gadgets, reviews

Review: Bayan Audio StreamPort Universal Bluetooth streamer

Problem: you want to play audio from your mobile device on powered speakers or through your home hi-fi. Usual solution: connect a cable from the earphone socket on your device to the powered speakers or to an input on your hi-fi. That is a little fiddly and untidy, so how about a wireless solution instead?

image

This is where Bayan Audio’s StreamPort Universal comes in. This little USB-powered box in effect enables any audio system for Bluetooth. Simply connect the output from the StreamPort to your hi-fi or powered speakers, using either a 3.5mm jack socket or right and left phono sockets, and then pair it with your mobile device. Audio output is then redirected to the StreamPort and you can enjoy the music at full quality.

imageimage

In my tests the StreamPort worked exactly as advertised – well, nearly. You put the StreamPort into pairing mode by holding down power for 8 seconds. A Sony Experia T Android phone connected easily, I fired up Google Music, and was able to play one of thousands of tracks at what sounds to me very decent quality.

Next I tried an Apple iPad 2. Again, it paired first time. I started BBC iPlayer and was able to watch a recent broadcast with excellent sound over hi-fi speakers. A Windows 8 tablet also worked well.

You can pair up to four devices, but only one at a time will be active. If the “wrong” device grabs the connection, turn Bluetooth off on that device. If you pair a fifth device, it will simply forget one of the other pairings.

So what didn’t work? Well, the StreamPort supports NFC Secure Simple Pairing, which means you can connect a device simply by tapping it. I tried with the NFC-enabled Xperia T and got the amusingly polite message, “Unfortunately content sharing has stopped.” I am not sure whether this should have worked, but I put the failure down to this being a relatively new protocol; perhaps it would work with the newer Xperia Z. Note that Apple devices do not currently support NFC at all.

I also experienced very occasional audible stuttering, which is unfortunate, though most of the time everything was fine. Still, this could be annoying. I heard it on music on the iPad and on the Windows tablet, but BBC iPlayer was fine. I guess it may depend on the underlying bitrate and how much data is being transferred. I am reluctant to pin the blame on the StreamPort; rather, it is a common problem with Bluetooth audio, it may or may not be something you experience, and shows that the implementation of the standard (or the drivers) on devices has a little way to go before it is rock-solid everywhere.

Is the quality as good as it is through a cable? Generally not, though how noticeable the loss of quality is in the realm of “it depends”. It is a digital connection, so in some circumstances (if the analogue output is poor) it could be better.

Bear in mind that if you are using a mobile device as the source, you are probably not looking for the best possible sound quality; but you will probably be pleasantly surprised by how good it can sound.

The actual quality will depend first, on the quality of the source, and second, on what audio protocol the source negotiates with the StreamPort. Bayan states that best quality will be from Bluetooth devices that support aptX compressed audio. The protocol used is generally invisible to the user, so all you will notice is how good it sounds. Generally a more recent device will sound better. At a minimum, your Bluetooth source has to support version 2.1 and the A2DP profile, otherwise it will not work at all.

image

In the box is the StreamPort, two audio connection cables, a USB cable for power, a USB mains adaptor, and a brief manual.

Two final thoughts. One is that Apple has its own AirPlay system for wireless audio; but thanks to the rise of Android we are seeing more Bluetooth audio devices coming on the market. Since Apple devices work with Bluetooth audio, but Android and other devices do not work with AirPlay, this is an obvious response to demand.

Second, it is reasonable to expect Bluetooth audio to be built into an increasing proportion of new playback equipment. Of course, in this case you will not need the StreamPort. It is not that common yet though, which makes the StreamPort a handy accessory. Recommended.

audio, gadgets, reviews, smartphones, tablets

Review: X-mini KAI, a Bluetooth audio dock you can put in your pocket

X-mini makes a popular range of what it calls Capsule Speakers, the latest of which doubles as a wireless speakerphone for your mobile, thanks to Bluetooth connectivity. Essentially, your smartphone sees it as a Bluetooth headset.

image

First though, a word or two about the distinctive design. In the box you get the X-mini KAI, a USB charging cable that also has an audio cable for play-as-you-charge, a handy soft drawstring bag, and a tiny instruction manual.

image

The X-mini KAI measures around 6cm in diameter and 8cm high when expanded. However, you can also push down the concertina and twist left to lock, whereupon it is just 5cm high. You can play it in this mode, but it sounds pretty bad. Still, easily small enough to put in your pocket.

Fit and finish is OK but could be better. Locking the unit shut takes some force and is slightly awkward because of all the switches. The multiple switches and ports do slightly spoil the appearance of the device and are somewhat fiddly to use.

image

So how does it work? First, charge it via any USB connection. It takes at least 2.5 hours to charge fully, for which you get up to 8 hours of playback.

Once charged, you can use the KAI in several different modes. There is a three-position switch. Centre is off, or push left for wired audio, or push right for Bluetooth.

In wired mode, you can use the short 3.5mm jack connector which is coiled neatly in the base to connect to a SmartPhone, iPod, MP3 player or any audio device, and play your music. There is no volume control on the KAI in this mode, just control it from the audio device.

image

The sound is mono of course, but not bad at all. You have to be realistic about what you can get from such a small speaker, but it is far better than the tinny sound you will hear from built-in speakers on phones and tablets.

I used it with the Google Nexus tablet with success. The Nexus is excellent for portable entertainment, particularly if you hack it a little to support Adobe Flash. Combine it with the KAI and you get much better sound from Google Music, BBC iPlayer, YouTube and the like.

X-mini quotes speaker power of 2.5w, frequency response of 100 Hz – 18 kHz, and distortion of less than 0.3%. Unfortunately these figures are meaningless without qualification; frequency response for example should be quoted as plus or minus 3dB or some such.

Still, with devices like this it is the experience that counts, since we are not talking hi-fi exactly. The KAI is a lot of fun, punchy and clear, you can hear a little bit of bass, and transforms the sound on your mobile device into something you can actually enjoy without earphones.

I compared the KAI to my trusty Creative Labs TravelSound. I give the nod to the TravelSound on sound quality, though the KAI was not embarrassed. However, bear in mind that the TravelSound has two speakers, is too big for the average pocket, and eats batteries unless you also carry a mains adaptor with you. KAI wins on convenience.

You can also wire two or more KAIs together for better sound, though I was not able to try this.

Wireless sound

The KAI also works over Bluetooth as mentioned above. To get this working, you slide the Audio key to the right. Then go to your mobile device, enable Bluetooth, and search for available devices. All going well, it will find the KAI and connect. This worked fine for me on the Nexus and on a Nokia Lumia 800 Smartphone.

Once connected, audio plays back through the KAI. It is as simple as that, and although there is some theoretical loss of quality, I did not find this audible on a casual comparison. Your battery will run down a little faster on both devices, but other than that it works just the same.

What’s nice about the wireless connection is that you can move your mobile device around the room and playback is not interrupted. The range is given as up to 10 metres, by which time you will hardly hear the KAI whether or not it is maintaining the connection. I tested this by walking around and the results were good.

In wireless mode an additional control on the KAI comes into play. Press down to play or pause. Move briefly right or left for previous or next track. Move and hold right or left for volume adjustment.

image

You can also use the KAI as a speakerphone, and I tested this with an incoming call. When you hear the ring, press down the control above to answer. The music will pause, and you will hear your caller through the KAI. You can end the call by pressing the same control.

The snag with the call though was that my caller said I was hard to hear. I could fix this by holding the KAI close to my mouth but this was disappointing.

There is a mute button on the device, but note that this does not mute your voice when in a call. Rather, it mutes the speaker in the same way as during any audio playback.

Summing up

This is a great little device, ideal if you want a very small and portable travel speaker that still sounds decent. Bear in mind though that the X-mini capsule speaker is also available in a wired-only form for around a quarter of the price, so you are paying a lot for the Bluetooth and speakerphone features.

The wireless audio works really well, but the microphone seems insufficiently sensitive when used as a speakerphone and I would not want to use it for conference calling. That is a shame since this is otherwise a compelling feature, unless I was unlucky with my sample.

The review unit was supplied by Phone4U and you can find it here, price at the time of writing £79.99.