#1
I have an old Fender bassman stack, about thirty years old. There's two bass inputs and two guitar inputs, but I'm not sure if you can play guitar and bass at the same time. Is this possible? Will it affect the sound?
#3
You probably can, but that's not what the amp's made for, it's made to take one or the other, not really both.
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#5
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#6
Let me pull up a schem...

Yeah, you can have a bass and a guitar plugged in at the same time. The old blackface Bassmans (circa '64-'67) have separate preamps for bass and guitar. You may end up getting power amp saturation sooner, but that isn't necessarily a bad thing.

Don't plug in two guitars or two basses though. It isn't made to handle that.
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#7
Please explain, following your study of the schematic, why it couldn't handle two guitars or basses?

If you mean it's bad enough using both channels at the same time and using both inputs to the same channel would be worse, I'll agree with you. The little resistor network on the jacks won't do much to mix two instruments plugged into the same channel.

There is nothing much wrong with plugging a guitar into the bass channel or plugging a bass into the normal channel. Or plugging either into each at the same time.
#8
Quote by Ronsonic
Please explain, following your study of the schematic, why it couldn't handle two guitars or basses?

If you mean it's bad enough using both channels at the same time and using both inputs to the same channel would be worse, I'll agree with you. The little resistor network on the jacks won't do much to mix two instruments plugged into the same channel.

There is nothing much wrong with plugging a guitar into the bass channel or plugging a bass into the normal channel. Or plugging either into each at the same time.

Uh...that's what I mean. Don't plug two guitars into the guitar channel or two basses into the bass channel.

There's nothing stopping you from plugging one instrument into each channel. The bass has its own preamp as does the guitar. That means they can both be used at the same time. However, input 1 on the bass preamp does not have a separate preamp from input 2 on the bass preamp, therefore they cannot be used at the same time.

Sorry if that wasn't clear.
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#9
You can use all the inputs at once if you want. Works fine.
The two inputs aren't mixed as Ron said. They're meant for different level inputs.
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