If you are splitting the preamp out, then the end that goes to the bass drivers goes into the MiniDSP and out to the amp. There is an A/D/A conversion though. The non-Dirac units are reasonable quick, 2 to 4 milliseconds.
Filters can be created that adjust the bass only. Measurement with REW is easy and an elegant solution, but it definitely has a learning curve.
- Rich
Yeah, you could do all that A/D/A conversion & MiniDSP with the learning curve.
But like Irv says, when your system already sounds mellifluous, you're not exactly chomping at the bits to do any of these things that you don't need to. You want just sit back and just enjoy if your system already sounds awesome and you are 100% happy. Why would I want to mess with A/D/A conversion that could screw up my amazing sound?
When I could just simply actively control the level of my bass without doing any of that?
IMO Audyssey Dynamic EQ does a spectacular job with the Bass EQ. I have been told by another forum member that the RBH SA-500DSP may perhaps do a better job or at least improves on Dynamic EQ. But right now I am 100% happy with DEQ, I'm not chomping at the bits to go through more learning curves.
But maybe I see your point. If you could actively bi-amp the bass, you could do miniDSP to EQ the bass, if you prefer it over something like Audyssey Dynamic EQ.
But if you could only passively bi-amp, you could not do miniDSP, which is why I think passive bi-amp isn't as functional as Active bi-amp, which goes back to the topic.
If you already have amps laying around, there is no harm trying out passive bi-amp. But don't spend $1000 or $2000 on amps thinking that somehow PASSIVE bi-amp will significantly improve the sound of your speakers. Spend that money on new speakers, subwoofers, or electronics (subwoofer EQ, Audyssey XT32/DEQ, etc) or something else important in life.