In article , bluestar09555
@mail.invalid says...
Would you use the 9 volt setting (which reads 7.5v) or use the 12v voltage
setting which reads 10volt, for use with this 9volt amplifier. Thanks for
advice.


Try the lower - if that leads to distorted sound, use the higher.
There's very little chance of damaging it on the higher, and nil on the
lower.

--
Skipweasel - never knowingly understood.