This search made me find the very interesting Tang Band W8 670Q drivers with enough data provided that I am itching to build a few clones, go figure.
Only problem might be some wall rattling or light fixtures falling, with 8 x 120W subwoofers driven hard With the Best Buy essentials BE-HC元14 6' 2-Way 1-Female to 2-Male RCA Splitter, split or merge audio or video signals from soundbars and other analog devices. So my suggestion is: wire all those 9 jacks in parallel (1 IN, 8 OUT) and give it a try I expect no magic smoke at all, absolute worst case insufficient drive or too low a load might make signal source clip, but it find that unlikely. Don’t let missing connections hold back your entertainment setup. Not with ample headroom, but not straining either. No need to unplug wires when switching between game consoles, DVD players, digital camcorders when using the 4 to 1 multi-switch Free RCA cable set. On the lowish side, but most modern preamps or crossovers can drive that. So IF we connect 8 x 22k inputs in parallel (what I guess you have there), we reach a total of 2k7 combined input impedance. Would never expect anything below 10k, simply because there is no reason or need for that. input impedance can be anything between, say, 10k and 100k, designer´s choice, but a common input impedance chosen is around 22k, simply because it´s "middle of the road", easy to get and easy to drive. US 75.6 US 2 off every US 20 HiFi 4-way Audio Switcher RAC 4 In 1 Out, 1 In 4 Out Converter Mc6 Alps +Shipping: US 12.59 Queenway Store US 27.99 Extra 5 off with coins ATAUDIO Siver-plated HIFI RCA to 2RCA Subwoofer audio cable hi-end One Sub-2 Splitter Y RCA Cable Free shipping Angeldac Audio Store US 29.32 US 42. * it also uses 2 or 4 RC455x which I think work as crossovers and input conditioning. Very much doubt they are straight connected to input jack, so their input impedance is irrelevant.
* amp uses 4 x TDA729x amps, two for satellites (arndn 60W RMS each), two bridged for woofer (around 120W RMS each). Just some out-of-the-box thinking, and in no particular order: Searched all over the place, found a couple User manuals, but none states input impedance ¿¿¿?
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