Are you wanting to simply have both guitars connected to the same preamp, possibly to expedite swapping between them in a live scenario?
If that is the case, I would suggest one of these little "A/B" switch boxes on the market. Many companies offer versions of this in a convenient floor stomp box format. Proco, Whirlwind, Morely, ART, etc all offer their version of this box. While they are primarily designed to take a single input and switch it out to 1 of 2 outputs (like "Clean" and "Dirty" amps), these boxes are also able to do the reverse of that: take 2 sources and switch between them to go to a single output, in this case, your preamp.
The operating impedances of most of these "A/B" boxes is such that it shouldn't load the pick-ups down. And the "active" versions won't "thump" or "pop" when switched.
If, on the otherhand, you want to mix 2 guitars into a single preamp so that 2 players are able to perform simultaneously, you are running into multiple issues. You will have significant tone and level changes due to the improper impedance oading of the pick-ups. What you CAN do is get each guitar its' own prwamp and then mix them through a small (think Mackie 1202 VLZ) mixer. But you already knew that, didn't you?
Are you wanting to simply have both guitars connected to the sam
Are you wanting to simply have both guitars connected to the same preamp, possibly to expedite swapping between them in a live scenario?
If that is the case, I would suggest one of these little "A/B" switch boxes on the market. Many companies offer versions of this in a convenient floor stomp box format. Proco, Whirlwind, Morely, ART, etc all offer their version of this box. While they are primarily designed to take a single input and switch it out to 1 of 2 outputs (like "Clean" and "Dirty" amps), these boxes are also able to do the reverse of that: take 2 sources and switch between them to go to a single output, in this case, your preamp.
The operating impedances of most of these "A/B" boxes is such that it shouldn't load the pick-ups down. And the "active" versions won't "thump" or "pop" when switched.
If, on the otherhand, you want to mix 2 guitars into a single preamp so that 2 players are able to perform simultaneously, you are running into multiple issues. You will have significant tone and level changes due to the improper impedance oading of the pick-ups. What you CAN do is get each guitar its' own prwamp and then mix them through a small (think Mackie 1202 VLZ) mixer. But you already knew that, didn't you?