I think what you are asking is really whether signal should be playing when you are measuring and adjusting bias (" biasing should be done with no input from the preamp"). I only check bias after the amps have warmed up for at least 45 minutes with signal playing to get the amps to normal operating parameters. That means the preamp/sources are connected, but when I check bias, I mute the preamp and no signal is passing into the amps when the meter is applied. Does that make sense?
Showing 2 responses by whart
Yeah, the turn on/off sequence is mainly to avoid a nasty "pop" noise from preamp turn on or off going through the system. You got it, @immatthewj Separate issue from biasing in my book. |