DDT compression?

[jjf777]

so ive got an m-3000 peavey poweramp,right? so when the ddt compression comes on,does that mean that the ohm load has dropped to zero? this might be a ridiculous question as i have no idea how this compressor works. i am only concerned because i run my cabinet at two ohms.appreciate any responses.

 

[mboogman]

My guess is it's more of a current limiter, and less of an audio limiter, designed to keep the amp from sending a square wave down the line. It probably only comes on when it's being pushed too hard for its liking, not when it's got a dead load.

 

[bsp01]

http://www.peavey.com/support/technotes ... isited.cfm

"To help you in your task of accurately reproducing sound without clipping-induced distortions, we incorporate DDT™ into our power amplifiers. DDT senses clipping (or current limiting) and reduces the gain to prevent audible distortion. In mixers we provide metering and clip/OL indicators. Recently, competitors' advertising has made a big deal about "headroom." One would be led to believe from the frequency of such statements that they somehow have more headroom than others—not so. Most contemporary mixer designs share similar limitations, namely, the power-supply voltages. The voltages are further defined by the integrated-circuit technology. Most general-purpose ICs are manufactured with a 36V process; this limits the power supply to +/-18V max. The more conservative approach, +/-15V rails, costs a mere 1.5 dB of headroom for increased reliability. There will be small to nonexistent headroom differences between competing mixers. Why the perceived difference? "

There's more to the whole read, but it describes what DDT does.