Based on the reviews in this forum, I purchased a Schroeder 21012, without having heard or played through one.
It arrived yesterday, conveniently just in time to use it at a blues/rock gig in a small biker bar.
And the verdict is... totally awesome!
I play a 1998 MIA P-bass through an Ampeg SVT-3Pro head. (The '98 P I also just purchased, but that's the subject of a different thread.) Previously, I had been using various 2x10 and 4x10 cabs I had been buying and returning from/to GC until I settled on something permanent, the latest being a GK 410 Backline. And before that, I used an Eden 2x10, but one of the speakers fried and I was ready for a change.
The Schroeder really sounded like a was playing through a high-end 2x10 + 1x15 (at least) stack. (I've never regularly used a stack due to lack of car space.) After a couple of songs, one of our guitarists remarked, "you sound much 'bassier' but still well defined." That describes the tone very well: exceptional clarity plus lows that sound like a big stack. I've played at this club many times, and I was actually able to play at a lower volume due to a rich, clear sound. I also had to make sure I played well, because any mistake would be easily heard by the audience, rather than being lost in the mix.
So, I finally have the "big" stack sound I've wanted from a single, reasonably sized cab. Count me as another Schroeder convert!