I strictly would use a power amp with input volume potentiometers on a Shindo preamp. Since Shindo preamps usually have a very high output, combinations with power amps without volume potentiometers can be a mismatch since you don't come up in the range where the preamp potentiometer works in it's optimal range. Therefore all Shindo power amps have a input potentiometer, separately for each channel. You should set them that the preamp potentiometer is between 10-12 o´clock position.
The mentioned behaviour is not a Shindo specialty it's common on a lot of preamps which use old shool carbon potentiometers. The only thing is that most preamps have a lower output which might be less critical when pairing them with power amps without input controls.
The mentioned behaviour is not a Shindo specialty it's common on a lot of preamps which use old shool carbon potentiometers. The only thing is that most preamps have a lower output which might be less critical when pairing them with power amps without input controls.