I completed Frankenstack this week. This is for my bass playing. I cobbled together one of my son’s amps, current amp, and an old practice amp. Franken is driven by my Sansamp RBI. The bass plugs into the RBI. The RBI is set to emulate an Ampeg SVT sound. There are four outputs in the back. One of them is fed into the input jack of the Vox D15 guitar amp, it’s a 1×10″ speaker. I set all the tone controls for treble. The next RBI output is fed into my Ampeg SVT3Pro which is using a Bag End S12-D, a 1×12″ speaker. I have the mid range boosted here, with a little bit of bass. The Ampeg is also connected via an effects loop to my tuner, distortion, analog delay and analog chorus, tremolo, and a BBE Sonic Stomp (don’t gig without one 🙂 ). Finally, a third feed from the RBI runs to the Peavey Max115, a 1×15″ speaker. The Peavey is tuned for the low end. It’s not about volume. It’s about tone. It sounds pretty decent. It was fun to build Frankenstack.