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If you think there is confusion why don't you try it and tell us how it works out. The OP in that thread has an integrated with outputs labeled "sub".
The outputs on the ATC integrated are specific for subs, so not the same thing.Some HTRs and other pieces have 2 sub outs that are mono.Did you even read any of the thread?
On the ATC they are summed mono outputs specifically for subs even though they are labeled as L & R.Back to the OP question here, not a good idea to combine L & R with a Y cable on his preamp for a mono sub input.
5.16 How do I turn a stereo signal into a mono signal [BW]=================================================================Creating a mono signal is often necessary when you are powering asubwoofer by bridging the amplifier. Many people do not realize thatbridging an amplifier does not always provide a mono signal - manyamplifiers will simply use only one input channel, which means that thesubwoofer won't be receiving the full signal.Some amplifiers have a switch that will allow you to combine the leftand right channels into a mono signal. Some signal processors and headunits provide a subwoofer-out channel that can be switched betweenstereo and mono.If you don't have this feature on any of your equipment, you will needto provide a mono signal to the amplifier. The common thought is to usea Y-adapter to "combine" the left and right channels. However, byusing a Y-adapter, you are actually summing the line voltages anddirectly shorting the left and right channels at the head unit, whichcould cause problems.The correct way to create a mono signal is to cut off the ends of theRCA cables, combine the signal grounds (the outer shield), and then usea 1 kOhm (1/4 watt, 5% tolerance) resistor to each of the centerconductors. Solder and insulate the resistors so that you don't shortthem prematurely, and then connect the two resistors together. Connectthe summed signal ground to the shield of the new RCA plug, and thesummed center conductor to the center pin of the RCA plug.
snipI don't follow the rest of your reply (mentioning two sets of speaker cables), because the sub only has a high level cable which terminates in their Speakon connector port at the sub and sends three wires out to the amplifier's speaker terminals — red, yellow, black. Speakon: http://signalcable.com/images/RelSpeakon.jpg
Here is REL's response: "We would recommend connecting low level from your preamp to the R328 as the safest connection for your current setup. As long as it's safe to use a Y splitter out of the QS preamp, this will be fine for going into the single input on the sub."So now I need to go back to Quicksilver (QS) to ask that question. Jeebus.
I would distrust REL from now on. They are an established audio manufacturer, and they are recommending a ghetto method for using their products.
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