The Ampeg B15 was designed for DB originally. The B100R has a few sneaky features to cop that sound:
- a 15" but in an undersized/heavy cab. Lows are controlled & nicely balance with mids... the classic 80-800Hz B15 'fullness' that sits well in a mix.
- progressive bass roll-off/HPF past 5(?) as the input is turned up. Boost input signal to avoid this.
- high freq roll off @8kHz (?) giving a warmer tone, less piezo quack.
- no tweeter so Treble boost switch doesn't sound shrill.
Ever tried a Sansamp pre/DI?
- Blend in 25-50% amp sim for a thicker/fuller tone on loud gigs,
- use as a boost to get more volume out of your B100R.
- Gives a similar sound to blending in a mag PU with steels, which isn't an option with guts.
- ParaDriver's sweepable mid freq is very handy too.
- might not be the puritan option, but at 100dB might be exactly what you need to be heard.
Ever tried a kids plastic toboggan to slide it over snow??
I was using a sansamp a while back, but into a different amp. I used it a lot when I still played slab. Have nothing but good things to say about it. I'm a little surprised when I hear people say they couldn't find a good sound with it, but to each their own. I've never had the PARA version.
I haven't tried it with upright into the B100R. The Radial I'm using has every feature you need, sounds good, and the DI sounds much better through the PA to my ears than the sansamp did. If I didn't need an amp for stage monitoring, I would probably just run my bass through the PA using the Radial.
I wish the B100R weighed about 20lbs less.