Oh how I wish Class D amps ...

Well, I have Rowland 102 class D amp that "sound dry, unmusical, and strange in the treble ... kind of chalky and rolled off, and definitely lacking air" and unmodified Benchmark DAC1 that according to another review suppose to "sound lo-fi and shrill". In addition I listen to CDs that again according to opinion expressed on this forum "I found almost all cds way to harsh and shrill sounding" and overall sound is short of amazing. Keep going guys - you helped me a lot!

" 'd' amps have a pretty good phase shift in the HF range due to the Zobel."

To the best of my knowledge no class D amplifier on Earth uses Zobel "filters". With Zobel, you would need to build up your amplifier individually to satisfy requirment of each individual speaker not to metion its other problem. It would be terrible creature....

All, with no exception, class D amplifiers have a challange in HF signal processing. Similar to that of traditional tube amplifiers in LF area and traditional transistor amplifiers in midrange.

Simon

There is no signal processing since most of class D amps are analog. As for the Zobel - Yes it is choke and output resistor and capacitor. Icepower calls it Zobel.

Excerpt from datasheet of Icepower 200ASC and 1000ASP modules:

"Due to the compensating Zobel network in the output stage, the maximum allowable short-term output power
is frequency-dependant."

I have heard many Class D amplifiers, the latest Nuforce can seriously challenge many, really expensive conventional amplifiers. Nuforce are the only switching amplifiers that I have heard that have a liquidity and presence in the midrange that rival really good conventional amplification.

I have heard the Bel Canto and other Ice amplifiers which sound much more hifi than the Nuforce.

If you haven't heard the latest Nuforce you should listen to a pair you will be convinced that these types of amplifiers have real promise.

Hello Kijanki,

I wish to apologize. I have had no idea whatsoever that ICE Power uses Zobel network. I don;t want my words to be iterpreted as even slightest critic of our competitor.

Still, for the record (and from our web site):

" Spectron designs team won a contact with pro audio giant Inter-m (among others in competition were Bang & Olafson and Philips)..."

Inter-M may be the biggest pro audio company and we are proud, as small team of 4 design & 1 production engineers, to have our design to win against somewhat more resoursful Philips and B&W ...but music lover have right to choose and be happy with any design they choose. Its a given.

If I offended someone - my deepest apologies again.

Regarding "There is no signal processing since most of class D amps are analog "..... before digital signal there was and still is analog signal which people for 100 years processed: from simplest as adding to most complex. Even computer does not need to be digital; some early computers were analog.... making my living for 30 years from digital signal processing I better know what I am talking about.

Respectfully,

Simon