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

Showing 2 responses by tweakjunky

Greetings One and All

So i fell across and have enjoyed reading this thread from page 1 - quite the hike. As an entry level audiophile with a passion for both stereo and home cinema and given the title of the thread I thought i'd chime in. Very much an enthusiast I have some basic understanding, have tweaked existing hardware replacing crossover components etc but do not pretend to understand some of the more advanced electronics principles involved in this discussion. I currently have a combination of class A/B and class D both in my car and home and have a mix of passive and active filters.

I don't expect to convince people looking for high end as up to now I have no experience in this domain but it is clear to me that class D amps are capable of some very serious sound and at specific price points can better other alternatives, this I believe is the common denominator for anyone interested in quality audio and the reason for my post.

I stumbled across and am very very pleased with my latest class D amp which happens to find itself inside a pair of floorstanders, admittedly a bit of an exception from most of this thread. I can highly recommend people investigate the Nubert active range, I'm currently running the Nu-Pro A-700

This is a fully digital class D implementation, so is digital up to the output stage, no DAC but a high end ADC for line in, it has the advantages of 3 way drivers with one amp per driver ( 2 x 90w mid and tweeter, 1 x 300W for the 2 woofers) phase correction and group delay as well as frequency response are managed by the onboard DSP.
 
There is a lot of technology at work here and I continue to be surprised by these speakers every time I listen. I took the risk of purchasing without listening base on reviews translated from a variety of German audio sites, one of which suggests there is currently no better active speaker under 10k€, class D or otherwise. at 2500 euros the pair they are worth looking into and there are other less expensive models built on the same principles.

Here's one of the reviews that show some of the guts:

http://mein-heimkinotest.de/standbox-revolution-fuer-2500e-paarpreis-die-nubert-nupro-a700/
(seems the link for the translated version gets cut short)

Thanks all for the very informative thread :)

Cheers
Phil



Nice summary of benefits of GaN for class D implementations:
https://www.eeweb.com/profile/alex-lidow/articles/how-to-gan-egan-fets-in-high-performance-class-d-audio-amplifiers

Class D clearly has even more potential although given the article was written in 2014 I struggle to understand why this tech isn’t more prevalent today. Am curious to open my amps and check the components but given the heatsinks present I suspect it’s not based on GaN tech. In any case I smell the roses and class D has come of age.

Cheers
Phil