I’m not sure what kind of fullness or edge you’re looking for, you do have a couple amps that could definitely benefit from being driven harder even though they’re solid state. If it’s that edge you’re looking for start looking for pedals. I’d probably look at the SansAmp Bass Driver first.I know this seems obvious and other posts say the same thing, but I actually don't like the sound of a large amp played at a really low volume. It doesn't always have the fullness or edge..just doesn't sound right.
FWIW, I have a Radio Shack “Optimus” practice amp that will marginally reproduce my low Bb at the volume I use in 2 bedroom condo(shared walls on either side. When I need more it’s headphones. I don’t dare fire up real amps unless I’m needed to test something out or service something...and I do it during the day on weekends and warn/apologize to the neighbors first.
