I run 2 Gallien-Kruger 400B amps with 1 Sunn 2-15 JBL's and 1-4x10 ported home built Cab...Used to have the 4-12 2-10 GK bottom that came with the GK 400B but it's like lugging around a refridgerator. Sounded awesome...but at the end of the gig you had it to muscle around.