2. amps-preamps
  3. 182198-18938

Class D with high efficiency speakers

I'm currently running PS Audio BHK Pre / Atma-Sphere S30 Mk3 OTL into Avantgarde Duo Omega horns (107dB/W 16ohms). I've been very happy with the sound of the OTL's the past 12 years and since retiring have been listening to my system throughout the day as well as evening. This is obviously impacting valve life (although Atma-Sphere amps seem very kind on valves) and my electricity bill.

I'm therefore keen to explore whether any of the new Class D amps would be a suitable match in my system.

I've seen a lot of reviews where Class D amps are feeding low efficiency / low impedance speakers and I can see the benefit of their ability to supply current etc.

My question is, does anyone have any experience of running a new Class D GaNFET amp into high efficiency / high impedance speakers?

rocketiii
jasonbourne52's avatar
jasonbourne52
2,863 posts
 

You can buy and try the Topping PA5 amp ($349). Advanced Class D 55wpc. It measures exceedingly well!

tweak1
3,666 posts
 

Ralph recently introduced his own class D amps. He says he likes them even better!

kokakolia's avatar
kokakolia
198 posts
 

I ran a desktop mini amp with a Tripath TA2024 chip (10W) through my 91db speakers (Closer Acoustics OGY). Yeah it works just fine. No complaints. I only upgraded to a typical 40W class A/B amp for more power. 

One thing I would be concerned about is the noise floor of some of these cheaper class D amps. The Tripath amp is very mediocre by all standards and the noise floor is noticeable when you put your ear against the driver. I experience the same thing with my class A/B amp. It's hardly a bother.  

If the Topping PA5 measures well then by all means get it. The convenience of having a book-sized amp which runs cool is a huge plus. 

More to discover