View Single Post
  #6 (permalink)  
Old December 22nd 15, 05:02 AM posted to uk.rec.audio
Trevor Wilson
external usenet poster
 
Posts: 801
Default MOSFET amp - thump at switch on.

On 21/12/2015 11:46 PM, Dave Plowman (News) wrote:
Common way to stop the thump you can tend to get with a MOSFET amp at
switch on was a relay on the speaker output.

It occurred to me that in these days of cheap high power triacs it might
be better to ramp up the AC into the amp - even if it uses a conventional
power supply?

Comments welcome. ;-)


**Have a look at the Rotel RB991. No output relay, no switch-on thump.
Nicely done, Rotel.

--
Trevor Wilson
www.rageaudio.com.au

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus