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Question on OU812 Pre and Post controls
The OU812 is a very nice and flexible amp. I'd like to better understand the pre and post controls and how they are voiced between the Rhythm and Lead channels. I assume Pre is impacting preamp distortion, but I'm not sure the role Post plays - is this between the preamp and phase inverter into the power amp? Or does it control power amp distortion? If so, does that mean the Master Vol is just a block output level control - or is that controlling the power amp distortion?
I can certainly hear a difference between the color of the distortion created by Pre and Post, but it would be helpful to have a visualization of a block diagram of the amp to understand where the distortion is being produced, by what, and how symmetric or asymmetric it might be.
I can certainly hear a difference between the color of the distortion created by Pre and Post, but it would be helpful to have a visualization of a block diagram of the amp to understand where the distortion is being produced, by what, and how symmetric or asymmetric it might be.
Comments
pre after the first input tube
post somewhere along the chain, toward the end of the preamp cascade
volume would be a 3rd gain control, after the post and typically just before the phase inverter.
So the pre and post are both "Preamp Gain" and Volume is your Power Amp Gain?
Is this the same with Britannia? It Has Pre Gain Master Gain and Vol.
Is Vol just an output limiter here or does it affect Power Amp sim gain
Does the Vol knob actually affect the tone and saturation or is it just an output level?
Why is this an issue for you may I ask? Are you unable to get the sound you want? Or just curious outside of any practical application?