I figured I'd take an OBP-3 and make it into an outboard unit. Still need to find a proper casing, but it works and works well. BTW, the Aguilar OBP-3 is a killer preamp. It still keeps the essence of the bass' sound, yet let's you tweak it's tone without making it sound like a different bass. The bass boost is awesome, tons of beef without the mud. The highs are nice and clear. The preamp isn't too noisy either.