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Class D is just Dandy!

I thought it was time we had a pro- Class D thread. There's plenty of threads about comparisons, or detractors of Class D.

That's fine, you don't have to like Class D amps, and if you don't please go participate on one of those threads.

For those of us who are very happy and excited about having musical, capable amps that we can afford to keep on 24/7 and don't require large spaces to put them in, this thread is for you.

Please share your experiences with class D amps!
erik_squires
kdude66
1,200 posts
 
George,
I have looked at at the technics,very interesting,now we need other designers too go in that direction and evolve.

I had one of the very first technics CD players in 1983,touting perfect sound forever,I now have a ps direct stream.Look how far digital has evolved but it has taken a long time.With me it's not about the money,I can buy just about anything I want,If I like it I will Buy it.A good example of me is auditioning a set of demo magico q3 at a dealer with money in hand but I really wasn't that impressed because they really didn't better what I currently own in speakers.

Basically there is a lot of hype in this industry and I really don't have time for it,I just want too everyday enjoy the music.
My most recent purchase is a set of tekton double impacts,I get them next wed.I read about them and then I called Eric and asked a few questions that he quickly answered which sold me instantly to purchase.I respect his talents as a speaker designer and I will see if I like them or not.I know he makes some very bold statements about his speakers and has even gotten a patient for his design.

Kenny.

kdude66
1,200 posts
 
Erik,
Class d amplification is just "DANDY".
Thank You for starting this thread.

Kenny.
erik_squires OP
16,898 posts
 
@kdude66

Thanks and welcome! :)

Erik
erik_squires OP
16,898 posts
 
One thing I'd like to see for the nCore modules which I can't find is output phase angle. If anyone can point me to a doc which has this I would appreciate it.

I notice that the ICEPower units do have some phase shift involved. It is minor compared to what your average multi-driver speaker and crossover will do, but it's significant. This is something the Technics SE-A1 compensates for in the input.
kdude66
1,200 posts
 
Erik,
Buried on page 5 of the NC400 spec sheet is the figure relating to output coil inductance. Typically, 10uH. This equates to an output impedance of 1.25 Ohms at 20kHz and SIGNIFICANT phase shift within the audio band.

Page 8, graph 9.1 is particularly telling. -0.5dB @ 20kHz is nothing to write home about. It also suggests serious phase shift problems well down into the audible spectrum.

I remember seeing more info somewhere about this,but I did'nt save it.

This is related to the nc400 only but I did'nt stress about it too much I just continue to enjoy them.I do like my 600 m's more than the 400, but I'm using my nc400 right now.

I hope this points u in the right direction,I way spend some time later looking for more info.
Kenny.

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