Ok, ive been playing with both solid state and tube amplifiers for quite a while now, but can anyone tell me why most solid state amps (even the cheapest ones) use between 8 and 20 opamp stages? the best solid state amp ive heard used a single opamp and 3 JFETs... dont these companies want to make these things as cheaply as possible? and all of these are for tone shaping, whats wrong with passive filters?
It depends on the functions available on the amp. If there is lot of filter, an effect send, return...
All of these stages need opamps to make filtering, buffering or gain.
Basically, it's true that you can make a very simple guitar amplifier. A gain stage for the input (INA217 can do this job for example), followed by a phase inverter that drive the power stage (AB class push-pull in many cases).
No filtering, just voltage gain and current gain.
All of these stages need opamps to make filtering, buffering or gain.
Basically, it's true that you can make a very simple guitar amplifier. A gain stage for the input (INA217 can do this job for example), followed by a phase inverter that drive the power stage (AB class push-pull in many cases).
No filtering, just voltage gain and current gain.
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