How can I do this with two peavey bass series 400 heads? There is no power in/pre out. Only an input that says booster amp.
I use a Lehle splitter to push two amps (that way I still have individual amp control - but if you want to slave your amps - you may be able to run an instrument cord from the effects preamp output jack on the master amp to the effects preamp input jack on the slave amp?
that's an old Peavey and may not have a preamp/effects out, not sure, though. Your splitter idea is good, and if there's a second input jack you could also jumper that into the input of the second amp. Done all the time in guitar land.
Thanks, I was just going to edit my post. EDIT: Assuming it has effect send/returns and they don’t break the signal chain.
Manual here: http://www.peavey.com/assets/literature/manuals/bass.pdf You could run an instrument cable from the "booster" to the input (#2) of the second amp and adjust the input gain.
It'd be into an 810e. I just got two of those heads on the cheap. So booster into input on second head would be bad?
Not at all, use the #2 input on the "Normal" channel (that one is for high level signals) unless you want a distorted sound then use the #2 input on the "Distortion" channel
No trouble, download the manual from the link and keep it handy for future use. You usually find things you didn't know existed, even in a simple amp head.