It's a switchmode amp how they are modulated is a bit of science bitstream like high frequency something / pwm like and there is a filter at the output .
In the simplest for as I understands it switchmode amp is a kind of pwm (pulse width modulator ) . On and off pulses with a length, the filter then converts length to amplitude ( simplified ) you are charging the output filter to create an wave form . So somewhere there is a PCM to PWM conversion and a filter . There is some rocket science to make switch amplifiers good nowadays the cheaper ones are not as good as an traditional a/b amp but they are cheap small cool and energy efficient . There is some cult around the simpler class D amps often of very low power , but that might be a novelty for the audiophile to have some other kind of coloration to wax about An odd french design http://www.devialet.com/ which have claimed performance that is extremely good in any amp (but this is not cheap ). Required output filter may rise the output impedance of the design at higher frequncy not as bad as a tube amp but to some extent . This should get cheaper and better over time, they are already standard in subwoofers . -- Mnyb -------------------------------------------------------------------- Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub. Bedroom/Office: Boom Kitchen: Touch + powered Fostex PM0.4 Misc use: Radio (with battery) iPad1 with iPengHD & SqueezePad (in storage SB3, reciever ,controller ) http://people.xiph.org/~xiphmont/demo/neil-young.html ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=94054 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
