AnalogSteph
Major Contributor
That changes things a bit.
So is this a 2-way then, rather than the more common 3-way configuration?
The amp that's particularly critical in terms of noise is the treble, and it appears the Korneff 45 SET may have a voltage gain of as low as 1.8 (5 dB), even lower than the ACA. This will hit 2.83 V of output with 1.57 V of input, so I don't envision any noise floor problems even with a little MiniDSP (2 Vrms output, 103 dB dynamic range).
So the LF amp would be a TA-10.2P-SE then? (Jeez, they want 259€ for a little 2x 10 W Tripath Class D amp? Now that's a bit steep.) Being that the driver naturally rolls off and may not be quite as hot as the treble anyway, its noise level is somewhat less critical. Which is all the better since SNR of this amp is spec'd at 98 dB, for a noise floor of about 112 µV. (If that is acceptable, a lot will be.) No gain spec, unfortunately, but it appears that these T-Amps are mostly rather low gain affairs, too. "I can see a line-level attenuator in your future."
What are you using for measurements by the way? In something like this where proper response can only be verified at some distance, I would be inclined to use a directional microphone over your average omni measurement mic, even a short shotgun perhaps (it would have to be a good one though, like an MKH412 or a Deity S-Mic 2 or the shorter 2S).
