Class T amplifiers

The new thing on the block is Class T digital amplifiers. Tripath. Supposed to be ultra efficient. It's used in my head unit, works great, but wondering how much power they draw (amperage): using these specs for example:

Frequency Response 20 Hz – 20 kHz

Those are the specs for a Class T amp. MA Audio. Model H2K-TP. Thanks.

My Arc amp uses a Tripath chip.  From what I understand, they are very similar to class D.  In other words, they are very efficient at lower power levels, but at full power efficiency drops down to A/B range.  They are also much more expensive to impliment.

You say your head unit has a Tripath chip in it?  They are kinda large, and really not needed in head unit's, so that is surprising.  What head unit do you have?

Steven Kephart

Adire Audio

Here is a bech test of a class T amp.

http://www.carsound.com/reviews/amps/Ultimate_DT2-800.html

Preliminary test results on MA Audio H2K Class T amplifier:

Maximum bridged output before clipping @ 12.5 volt input: 62.7 volts @ 2.5% THD 20-20KHz (measured into an 8-ohm reactive load)  This correcponds to 1965.6 watts into 2-ohms bridged.  Maximum output at <10% THD: 80.7 volts.  Damping factor 20-20KHz into 8-ohms reactive: 46.  DIN power @ 1KHz, 1%THD into 8-ohms reactive: 76.5 volts.  THD from 20-20KHz @ 28.3 volt output: 0.2%  S/N ratio (IHF A) 20-20KHz <0.2% THD: -88db.  Frequency response +/- 1db: 18 Hz to 35KHz.  There is significant measureable high frequency noise above 35kHz extending up to 150KHz.  Switching noise is present and audible at startup, measured at 46db.  IMD from 20-1KHz is <0.1%, 1KHz to 20Khz is 0.25% @ 28.3 volt output.  Overall power efficiency: 63%  Distortion numbers in general increase at higher frequencies much faster than at lower frequencies as power output increases.

This looks like a decent amp for subs, but probably not for mains.