Amp for below 105 Hz

I'm looking for a very musical amplifier to drive a 4ohm, 12" woofer, from 105 Hz down.
One with adjustable gain is preferred but it is not essential. [I'm still waiting for the manufacturer to tell me what the gain is on the other amps in my system.]
I'm looking for musicality and nuance over slam but a combination of the two would be nice.
If I was to choose between 'big bass with lots of bloom' and 'small, tightly controlled bass', I would choose the former.