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Review: inMotion iPod Speakers (updated)
Audio: First of all, understand that you are not going to get fantastic full-range audio from a speaker system that uses 2 pairs of 1" drivers. It's just not physically possible. This is not for audiophiles; it is just for travel/convenience listening. However, the inMotions use an interesting trick to make up for the lack of low frequency/bass response: they reproduce the higher frequency harmonics (which the little speakers can reproduce) that the lower bass registers would produce in real life if played over larger speakers. The resulting bass can sound a bit hollow and artificial at times, but it is impressive the degree I perceive it to be present is given how small the drivers are. You do distinctly perceive a fair amount of bass without any actual low-frequency thumping or movement of large amounts of air -- pretty cool.
The high-end response is good, as expected from the small drivers, and the midrange response is better than most small micro/travel speakers that use only one pair of 1" (or smaller) drivers. The simulated bass is surprisingly effective but subject to noticeable distortion if your EQ settings over-amplify the lower frequencies or if the unit is turned up too loud. I have found the "Acoustic" EQ settings seem to work well for the inMotions, luckily, on the iPod you have many EQ settings to play around with.
This bass-enhancement circuitry and/or the built in amplifier does add a bit of noise. You can hear it when you max out the volume w/o the iPod connected. It is not really noticeable at normal listening levels, though.
Because the speakers are located close together and cannot be angled outwards, stereo separation is limited, and music sounds somewhat "mono" and clock radio-like. However, putting a hotel menu or hard cover book opened to 90 degrees with the apex pointed at the midpoint between the speakers helped to spread the audio out a little.
Overall a good sounding set of speakers for less "bassy" music (great for guitar rock, jazz, acoustic and vocal pieces; not so good for techno/dance) at moderate to quiet listening levels. These would be great for Audio Books. Distortion becomes a problem when you turn the speakers up beyond what is reasonable for such small drivers, but you can provide surprisingly full and loud sound to fill a good-sized hotel room (try using the Bass Reducer EQ setting if you have to turn them up really loud).
Hardware/Build: The base station and speaker assembly are fairly well built, but still a bit cheap feeling for something that costs $149. The whole thing folds open/closed much like an oversized audio tape case to protect the drivers. The side arms are made of a brushed aluminum complementing the look of the iPod.
The docking connector for 3G iPods is exposed, and could use a cover of some sort. However, I have one from the firewire cable that came with the iPod that will do just fine, assuming it doesn't fall off and get lost too fast. There is a spacer that comes with the inMotion that is supposed to give a better fit with the 10 and 15/20GB models, as the slot has been made to fit the thicker 30/40GB iPods. I found that the spacer wasn't needed for the thinner iPod to fit well, so I suspect the thicker iPods will have a rather tight fit.
The volume buttons are a -/+ affair to the left of the iPod with a slider switch for power on the right and a power indicator. There is no volume level indicator and since the audio signal is taken from the line-out pins on the 3G connector, you cannot use the iPod's on-board volume selector/indicator. Not really a problem -- the non-amplified line-out's on the iPod reduce distortion to the signal that the inMotions have to work with anyhow.
Connections: On the back of the inMotions are line-in and line-out connections, both 1/8" headphone jack connectors. The line-in port is used for 1G and 2G iPods which don't have the new connectors to dock with. A short dual-male 1/8" cable is included for hooking up the iPod's headphone jack to the line-in port. There is also a little rubber platform that covers the 3G dock connector and recess so that an older iPod has a place to sit between the speakers. The little rubber thing didn't stay in too well, but it was a nice thought.
There is a connector for the included DC 9V/1.6A wall-wart power supply. Unfortunately, the sucker is a bit large and it would have been nicer if the prongs on the AC adapter collapsed for better stowing. Also present is a connector for the special firewire cable that came with the iPod, so you can recharge the iPod while it is still sitting in the inMotion.
However, plugging in the firewire cable with Apple's 12V/1A AC adapter (which is nice and small, and has collapsable prongs) does not also power the inMotion. It would have been a cleaner solution if the inMotion could have been powered off the Apple AC adapter so you wouldn't have to carry around 2 AC adapters, and it would also have meant less of a cable mess behind the thing.
Battery Life: The manufacturer claims 12 hours, this will be very dependent on the volume levels you select. I have not run the 4 AA's down completely yet, but it has lasted as long as the iPod's internal batteries have so far. And no, it does not re-charge the iPod from its 9V AC adapter when docked, nor does it charge the iPod from the 4 AA batteries it uses. That would have been nice too.
Summary: Actually pretty good sound reproduction for such little speakers, certainly much better than my TiBook's speakers. No more hotel clock radios for me, but bring a good pair of headphones/in-ear monitors for really critical listening. If you're willing to run on batteries alone, it is a nice compact way to go.
The inMotions are a bit overpriced and could use larger speaker drivers (it looks like there is still enough room to mount larger speakers) that better yet could be angled outwards for better stereo dispersion. Also, there could be better integration of the Apple AC adapter (maybe someone out there is handy with a soldering iron? :) ) so you wouldn't need to carry around quite so many cables/AC adapters.
I'm glad I got these, as they'll make my already indispensable iPod more useful when traveling.
An update from EverLurking:
I noticed that another review of the inMotions stated that the power adapter that comes with it does in fact recharge the iPod. I went and checked it out, and Yes, the included power adapter will power the speakers and recharge the iPod at the same time. My mistake; I guess my iPod was fully charged at the time I first briefly tested the inMotion's adapter, and I didn't notice that the iPod was drawing power from the inMotion. It does not recharge the iPod while running off of the batteries (which is reasonable, as this would drastically shorten the life of the batteries for driving the speakers).
So you only have to carry around one adapter -- Good. I still think using Apple's little white iPod adapter would have been nicer though. The sucker now gets a 7.5 rating in my book, 8.5 if it was priced near $75.
There's a fairly nice big picture (as well as specs) in the PDF brochure.
Not a bad review, though at that price I think I'll stick with my Sony TR-55 speakers which are much more reasonably priced at $50USD, have a remarkably good sound for their size, and excellent battery life (upwards of 10 hours). Sure, they don't have the bells and whistles of these, but they're 100 bucks cheaper! You may also want to check out the TR-77 speakers if you want to spend a bit extra, think they're around $90USD.
Oh, seeing as I'm commenting on iPods, my fellow Europeans might be somewhat tempted to know that Apple Europe are now offering free iPod engraving, so you can't grumble that Apple keep doing these offers for the US only ;)
Any speakers that do not include circuitry to self-limit thier output (which only some very high end speakers have) will output distorted sound when fed too much power.
The amp in these speakers is too generous with it's output, and is sending too much power to the speakers when set to a high volumn.
This is common place in all commodity speakers and speaker systems. Manufacturers make them this way because the source audio you are playing may have been recorded at a low volumn - and thus needs to be amplified to a higher degree than the 'average' sound being put through the system. IE, sound recordings are not normalized for volumn to a 'standard'.
Go get an 'executive' sterero for a couple of hundred dollars. turn it up too loud, and you'll get distortion.
Take a factory stereo in a car, and turn it up too loud, and you'll get distortion.
I guess my point is: how is this a 'con' for this set of speakers, when 99.99% of all speakers bought suffer frm the same problem? It's like complaining that cars have only four wheels.
man is machine