But the sub pre-outs on the Sunfire are MONO. Sorry I confused the crossover slope with the frequency. I;m still confused, though. You say in one sentence that everything (sub and main woofers) are coming from the sub pre-outs which are crossed at 40Hz. Yet the next sentence you say all frequencies below 150 Hz are going the same place.
Now if it's the latter, which I expect it is (Sunfire TGP crossover at 150Hz, and sub crossover at 40Hz), there will be no hole, but the bass will be mono between 40Hz and 150Hz. Above 80Hz, you'll probably detect it as something missing.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer