Sorry, I haven't quite got it but why do you need to attach the monoblocks to the subwoofer.I would use the y junction.What source are you using?
How to connect monoblocks to a single REL sub with ONE RCA input
I just purchased two Quicksilver 60w Monoblock amplifiers and a LineStage Preamp by QS.
To connect this REL 328, normally one uses connect their Speakon cable (Red, Yellow, Black ends that connect to Right+, Left+, and Ground) or a SINGLE "low-level" RCA in. But this preamp doesn’t have a single sub out.
REL’s advice is to buy a second sub and attach one sub to each monoblock. Well, maybe I’ll do that, but in the meantime, I’d like to be able to hook up what I have.
Should I orient the amps so that the speaker terminals are close enough together to attach the strands of the Speakon cables? I have been warned by REL not to hook up high level to monoblocks because it will create a ground problem.
An alternative is that I get a Y cable that will bring two RCA outputs from my Preamp into the single RCA input on the REL?
Or is there another alternative?
Advice appreciated. (But please try not to tell me to just buy a second sub.)
To connect this REL 328, normally one uses connect their Speakon cable (Red, Yellow, Black ends that connect to Right+, Left+, and Ground) or a SINGLE "low-level" RCA in. But this preamp doesn’t have a single sub out.
REL’s advice is to buy a second sub and attach one sub to each monoblock. Well, maybe I’ll do that, but in the meantime, I’d like to be able to hook up what I have.
Should I orient the amps so that the speaker terminals are close enough together to attach the strands of the Speakon cables? I have been warned by REL not to hook up high level to monoblocks because it will create a ground problem.
An alternative is that I get a Y cable that will bring two RCA outputs from my Preamp into the single RCA input on the REL?
Or is there another alternative?
Advice appreciated. (But please try not to tell me to just buy a second sub.)
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- 45 posts total
Hi David (hilde45), First, congratulations on the purchases! Second, regarding... An alternative is that I get a Y cable that will bring two RCA outputs from my Preamp into the single RCA input on the REL? ... Don’t do that! It would result in the main speakers reproducing mono. And although I doubt that it would happen in this particular case, with some preamps doing that might even result in damage, eventually if not sooner, since you would be shorting the preamp’s outputs for the two channels together. Manuals for a number of REL subs that I’ve seen in the past suggest that to connect their speaker-level inputs to monoblocks, when one sub is being used, what should be done is to connect the red wire from the sub to a + output of one amp; connect the yellow wire from the sub to a + output of the other amp; and connect the black wire from the sub to a ground point or a chassis screw on the **preamp.** I suspect that is likely to work fine, although depending on the particular designs it is possible that a hum will result. But give it a try. Also, you don’t necessarily have to connect the red and yellow wires to the same output tap (i.e., the 4 or 8 ohm output tap of the amps) that you are connecting to the main speakers. Good luck. Best regards, -- Al |
@pjr801 — the reason is because the standard advice for this REL is to connect it to the main speaker terminals on a normal (non-monoblock) amp. I am trying to follow that advice from REL but adapting it to monoblocks. @almarg Thanks! I feel confident about these purchases. So, before I ordered the preamp, I had Mike wire the "Tape Out" as a *second* main out. Right now, the preamp's MAIN OUT goes to each monoblock and the other (TAPE OUT -- now a second main out) is free. Does that fact change your advice? (I don't know why the main speakers would become mono by doing this, but that's just from lack of general understanding about how these are wired.) Depending on what you say to the above question, I'll try the monoblock connection approach you suggest — and just listen for a hum. I'll also contact REL. It would be shame if I couldn't use the sub. |
Or is there another alternative?You can connect your preamp second main out to a Stereo to mono signal converter and connect one of the converter mono output to the REL 328 low level input. This converter utilizes an independent 1:1 ratio audio transformer for each channel, which also function as a ground loop isolator. https://www.ebay.com/itm/MCM-CUSTOM-AUDIO-50-20795-Stereo-to-Mono-Signal-Converter-/164155969190?_tr... |
- 45 posts total