If you can't get enough bass out of two Peavey 15's then you have some unusual needs. I would think two PR15 cabs would do the trick; stack them for a little more bass, if you need. Otherwise, look for an old Ampeg B-18 (not the B15). I've never owned an amp or speaker cab that could do better with organ sounds and bass.

Having said that, today's amps and speakers are more efficient and better suited especially for digital keyboards.

And, I believe the "N" was always part of the Peavey model designation; it just wasn't used. This series of speakers has always had "neo" speakers.

[This message has been edited by cassp (edited 10-22-2007).]