Originally Posted by Pradeep2
You don't believe the s7201 will "beat" the output of an S2? We are talking four drivers so at a low 20s xmax of say 22mm for the Eminence drivers in the s7201, that's 88mm of excursion, in a larger sealed enclosure, compared to 68mm (lets be generous and say 34mm for each) for the two Fi drivers in the S2. Same Speakerpower 4kw plate amp. The jtr 118 and 218 are ported so not really an apples to apples comparison.
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Good points as always. Is it possible? Yes. Would I bet on it? No. Curiously, the PSA S7201 has two large dead spaces in the front. I have no idea what this means and why a sealed design has to be "inefficient" with space like this. It almost looks like a bandpass enclosure, except it is not. Would be fascinating to see a third party pro like Data-Bass's Josh dissect this subwoofer's design.
Another important point that I would like to point out is that unlike a ported design, where a huge enclosure volume is critical with low tune (relationship between chuffing/port area/port length/enclosure volume/Fb), with a sealed design, one monstrous single subwoofer like S7201 is to me not as good as using multiples of smaller ones
. With sealed, multiple equivalent smaller units reduce room effect yet do not sacrifice output. The only cost is, of course, cost. One example is the case of 2 JTR S1's versus 1 JTR S2. Smaller multiples cost more, but sound better and, more or less, same output.
So yes, S7201 is cost effective, but it's hugely impractical size wise, and I would vote for multiple smaller sealed's once you are in this price range. Smoother room response, better sound. S7201 is to me a not so impressive and elegant product, engineering wise, once you dwell into the nitty gritty. Some examples: Two JTR S2's (yes I know higher cost) or four stacked DIY single sealed's with 30 Xmax would surpass S7201 WRT to room response, sound, output, and no comparison whatsoever, practicality and look. IMHO as always.