What class D AMP in the ipod hifi?

[classd4sure]

Hi John, is that what the ipod hi-fi is using as a DSP?

[JohnW]

Hi Chris,

I believe so, was drinking with the Rep. out here in Asia, he was boasting about the Apple IPod Boom Box design win, so I guess it's this unit...

John

[classd4sure]

You know this kind of seems like a very small market for this product. For the cost of it most people dont' seem willing to lug it around. Maybe if they don't have a computer at the cottage they'd like to take it out there, but otherwise all you need is a USB and you can listen to anything you like. It seems to me if they're actually trying to exploit the high end market, they failed to even introduce people to it, and given the price your average off the shelf receiver probably offers more and does it better.

Prediction of things to come:

Microshaft's Ipod killer will try to do them one better by making their own class d, then anyone with a breadboard will get sued.

[Saturnus]

I think that the reason the Ipod Hifi isn't really successful is that anyone with half a brain could make a better one by using a T-amp, an SLA, and a pair of cheapo 6½" full range speakers. Add an hour in the woodshop, and you're done.

[classd4sure]

Yeah, alot of people aren't so resourceful though, so to that I'll add, it seems like they're late arrivers to that market and have some worthy competition already that's more than competitive on a cost/performance basis.

[SpittinLLama]

If you plugged your headphones into a PowerMac G4 then you didn't hear the Class D amp which is the tripath 12V part. Apple had a smaller connector so you couldn't just plug anything into the Class D amp, like to drive a line level input to a stereo. The connector was for the Apple speakers. You should see two connectors back there and one is just too small for a typical headphone plug.

-SL

[speaker]

Originally posted by Saturnus
I think that the reason the Ipod Hifi isn't really successful is that anyone with half a brain could make a better one by using a T-amp, an SLA, and a pair of cheapo 6½" full range speakers. Add an hour in the woodshop, and you're done.

It also might be that the iPod HiFi doesn't sound very good and costs a lot.

One of my coworkers has one and even he, an apple acolyte, is disappointed with it.

(Althought that took him a long time to admit.)

[ouimetnick]

iPod Hi-Fi's amplifier is a Texas Instruments TPA3004D2 12W Amplifier IC The iPod Hi-Fi uses two of these chips. It has a dual voice coil subwoofer (yes it is a subwoofer. It only produces the low notes) The frequency response Apple says is a joke. It has no issues producing frequencies and notes lower 53Hz. I can get a clean 20Hz tone from it.