I have the CDA-117. The usb port crapped out on me. Any usb drive I connect to it, or even switch to USB mode, it gives me 'Current Error' message.
The biggest problem with this unit is not that though, as I'm sure I just got a lemon, its the speed. Its almost as slow as a Sony. Scrolling through playlists or artists from the ipod should be the same incremental speed as on the iPod. It isnt. Its not smooth, and skipping from one track to the next gives a delay, feels like lag.
It gets worse....
Using any USB drive on this thing is basically a great example of one step forward, two steps backwards. If I connect any USB drive to the unit, be it a compact flash card via usb reader, or a USB key, it automatically looks for mp3s and 'Banks' them, putting them into an alphabetically sorted list, kind of like what you'd get from an iPod. It does this by reading the ID3 tags. Sounds groovy, right? Well, yeah...until you pass 1,000 songs that are banked. I tested the unit at a local shop and found out that Alpine completely butchers this logic. I came back to the shop with my flash card, this time with a lot more music and the folders were a little mixed up, I wanted to see how well it detects files and folders, incase any got removed, shuffled around or renamed. The unit went bonkers. Artists werent displayed alphabetically, the unit stalled at the 'Banking' screen. It gets even worse!
This whole process of 'Banking' is the most ridiculously stupid thing I've ever heard of. What it does, is searches for the first 1,000 tracks on a device and puts them into a 'Bank'. So lets say if you have 1,500 songs on an 8gb USB Key. What happens is that it finds the first 1,000 and sticks then into Bank 1 and the next 500 into Bank 2. So when you want to search for music with all your artists displayed and the artist you were looking for isnt there, means that it is in another Bank (the unit holds up to 20, so 20,000 tracks can be stored).
Worse yet, the unit REALLY slowed down after I tried adding 1,022 songs to this whole 'Bank' debacle. Scrolling through lists was painfully slow.
Its the year 2010. Why is it so difficult for the guys at Alpine, Pioneer, Sony, etc. to say to themselves;
'Hey, lets throw on a usb drive input on the unit and allow people to simply browse their files alphabetically as they would in a windows filetree structure!'
The most OBVIOUS thing, and the saddest part of all this is.....the only manufacturer that does this RIGHT is......JVC! Ive played with the KD-R800 and the R810 and as far as ive been told, the R900 also does it the simplest way. I say JVC is the only manufacturer that does this right because all the other guys sort files and folders on a USB drive by the creation date of the folder. So if you added a folder 'Michael Jackson' with a bunch of subfolders and mp3 files inside each, and after than added a folder called 'Beatles' the first folder in the list would be 'Beatles.' Stupid!!! Sony does this. Alpine does this. Pioneer decks do this too. It really boggles the mind and causes incredible headache.
Now, as for the USB connection on my unit not working, im almost 100% certain im gonna take this unit, return it and exchange it for the JVC KD-R900. The R900 is basically like the CDA-117 except on steroids. Also has 5v line outputs as opposed to the Alpines 4v. Sound quality im sure isnt that much worse (I do admit, the alpine did sound pretty good even on my stock speakers).