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Sonos Amp and High level input from Subwooder?



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In a high level connection you would wire your speaker terminals on the Connect Amp to the speakers as well as to the high level inputs on the Sub.
A cut paste on the alleged benefit of doing this:
"In fact, even if your preamp or integrated has a preamp/subwoofer output, you may want to consider using the high-level connection method. The most prestigious subwoofers in the industry are made by REL of England. They are the “Gold Standard” of the industry and priced accordingly, topping out at $9,000! REL recommends using the high-level input for all of their subwoofers. The reason they recommend this type of connection is as simple as it is logical: it ensures your subwoofer is seeing the EXACT SAME SIGNAL as your speakers. If you use the preamp/subwoofer output from your preamp or integrated, the signal seen by your subwoofer does not include the tonal balance and timing cues created by the amp. By using the high-level connection, the subwoofer gets the same signal as your main speakers, keeping them in better synch with each other, thus improving sound quality."
Easy enough to verify this claim if you have the time and the inclination to experiment.
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The full signal input on a sub is usually for use with amps that don’t have a dedicated sub output. I think you’re better off continuing to use the Amp’s sub output, with the crossover frequency adjusted to suit your sub / your tastes.
You are mistaken. The signal will be the same, the only difference being use of crossover on the Amp vs the crossover on the Sub (and those differences should be inaudible).