I have tried powering my excellent RBH 1010-SEN with Hafler amps or Crown professional models. I thought I had things working well until I picked up an older SAM-200 from RBH. Holy crap. This sub is capable of such a deep wave at a lower volume. The quality of low end produced is awesome. When I checked with an RBH staff member, he advised that his personal favorites were the RBH SA-200 & 400. I snagged one of eBay cheap. When I opened the case to clean the mechanical switches. The quality is evident. It has a huge transformer, quality parts etc. I plan on grabbing any that come up for sale. Huge bang for your buck.

They don’t make them anymore.