Piggy-backing on what @jbhiller said very well, I use the Cornwall IVs with a pair of REL t7i's, speaker level from a Pass INT-60. The RELs have 8" active, 10" down-firing passive. They're small enough that the OP might be able to accommodate a pair. I've tried to cross them around 30-35, although REL doesn't make it easy to be precise in that regard. As jb said, they're not really necessary, but I like to think they add just a touch to the Cornwalls' palpable sense of presence.
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I have a pair of Klipsch corner horns, just the bass section. The go to about 40 Hz and at 106 dB/1w are effective for most listening. I would not add a sub, but built one anyway. I call the Klipsch "subs" because that seems to be the vernacular. I do have a sub-sub, which is a 14' transmission line with 4 15s. Three of those. TLs are narrow band but efficient. I can't measure the SPL but it should be flat to 4 Hz and judging from vertical floor movement, about 5.2 Richter. Good for rocket launches, end of world movies and such. Maybe some music. |
Hi Bill, Excellent idea. Since the Cornwall's woofer goes up into the midrange using a sub will noticeably decrease distortion. Good subwoofer systems do both HiFi and theater well. The ideal subwoofer system for Cornwalls would require two 12 or preferably 15" sealed subwoofers and a dedicated two way crossover set to 80 to 100 Hz with a slope no less than 28 dB/oct. I would use a digital crossover with room control and delay capability. So, there is no need for fancy electronics in the sub. The best way to do this would be to go to Parts Express and get this, https://www.parts-express.com/Dayton-Audio-15-Reference-Series-HO-Subwoofer-and-Cabinet-P-300-7093?quantity=1 You will need two of them. They are super easy to build and the driver is better than what you get in most commercial subwoofers. The money you save can be spent on the crossover. I would also upgrade the plate amp to this, https://www.parts-express.com/Dayton-Audio-SPA1000-1000W-Subwoofer-Plate-Amplifier-300-809?quantity=1 |
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