Undervolting power supply to lower volume

mercc · 23rd September 2010, 11:16 AM

Hi,
is it possible to undervolt 230v 30 watts amplifier through lamp dimming control to lower output volume? Will it harm the amplifier if it has 230 volts power supply and lower voltage will be supplied?
Thanks

sandyK · 23rd September 2010, 11:43 AM

Quote:

Originally Posted by mercc

Hi,
is it possible to undervolt 230v 30 watts amplifier through lamp dimming control to lower output volume? Will it harm the amplifier if it has 230 volts power supply and lower voltage will be supplied?
Thanks

IF the amplifier tolerates the lower supply rails, all you are likely to accomplish is severe clipping on louder music passages, with a high risk of destroying your tweeters. Don't even think about it.

SandyK

Mooly · 23rd September 2010, 01:50 PM

If you want to lower the volume use attenuators on the inputs... leave the amp alone.

23rd September 2010, 11:16 AM	#1
mercc diyAudio Member Join Date: May 2009	Undervolting power supply to lower volume Hi, is it possible to undervolt 230v 30 watts amplifier through lamp dimming control to lower output volume? Will it harm the amplifier if it has 230 volts power supply and lower voltage will be supplied? Thanks

23rd September 2010, 01:50 PM	#3
Mooly diyAudio Moderator Join Date: Sep 2007	If you want to lower the volume use attenuators on the inputs... leave the amp alone. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

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