Here's the deal: I might be able to get my hands on a Yamaha PA 18" sub for cheap, and I'm thinking about picking it up to boost the lows on my D-410XLT So here's my couple of questions: Can a WT-300 drive 2 cabs? It has more than one amp out. I don't think so, but I never know... More importantly, is there a way that I can bypass the WT-300's power section, and use the Pre-amp on it? Or, simply combine it with a power amp for a higher wattage? Because if I could just spend a couple hundred on a poweramp instead of a whole amp upgrade, that would be favorable. Is there anyway to do one of those two things? I'm not too well versed in amps, as you can tell. Thanks for the help.