Hi there, I bought an old Moog Parametric EQ recently but the ‘drive’ control doesn’t seem to respond. It does nothing to alter the sound. So I checked on different forums and there seems to be differing opinions as to how the control functions. I’ve seen the following -
“Noon to 3 o clock should be quite obvious. You should see/hear a change in the level, as well as a motorcyle-like distortion.”
“There’s also a gain control and a drive control. The latter tends to confuse many people, because there’s no perceived effect on the sound when you tweak it. What the drive control does is reverse the gain structure at the input and output stages for the purpose of improving S/N ratio. Rotating it one direction (I forget CW or CCW) decreases the input gain while increasing the output gain. The only change you will hear is decreased noise, if any.”
“I’ve heard a lot of people say their drive knob doesn’t change things, but on mine I can get it to distort with the drive on full and pushing the right frequencies.”
“The “drive knob” on both parametric and graphic eq is a internal level match, to get best headroom/signal to noise in the eq boost/cut amp section. This “drive knob” is a dual potentiometer there one half are connected around the amp before the eq section, and the other half connected around the amp after the eq section, and when you “drive” you increase the gain in the input amp, but in same time you decrease the gain in the output amp with same value. So the result is that you can not hear any gain change when you turn the “drive knob” from end to end, but you change the headromm in the eq section.”
Does anyone know this EQ and does any of this sound familiar?
Cheers,
Tony