Subwoofer cable question

With any REL being used in a 2 channel system, the best results are with the supplied REL neutrix cable. This allows the subwoofer to receive & mirror exactly the same signal that the speakers are getting. This allows the REL subwoofer to  blend perfectly with the main speakers. The RCA's are for 5.1 or greater home theater use allowing the LFE channel to be mixed more accurately with movie use. The end result is achieve the perfect 2 channel playback without  sacrificing LFE playback for movies. At the end of the REL cable, there 3 leads & depending on the type of amp, there are a couple of configurations. I would strongly suggest contacting REL customer support for the right configuration. I have sold RELs and currently own 3 vintage ones on 3 different systems & they are connected differently per REL's recomendation.

I want to run a Rel sub from my integrated amps "pre out" and the sub has only 1 "low level" and the "lfe" input. Do I need an adapter from stereo to mono or do the low level and lfe inputs on the sub act together as left and right input?

My suggestion is connect the left and right pre-out from your integrated amplifier to the input of a stereo to mono converter, and connect one of the mono output from the stereo to mono converter to the low level input on the subwoofer.

The LFE input on the subwoofer bypassed the internal low pass crossover, it is only useful for AVR/processor LFE or low-pass sub-out connection and not suitable for integrated amplifier’s pre-out.

I hope this answers your questions.

IF you ran all your subs off just the right channel do you think all of the bass track on the source recording will be reproduced?

Below 80 Hz, yes. The recording studio examples you are talking about is different. Drums, bass, etc have lots of output above 80Hz. This higher frequency output is what determines stereo L and R and gives us imaging. Below 80Hz simply does not do that. It is not a question of how it was recorded. That doesn’t even enter into it. Because the waves are so long, when playing back it no longer matters.

The proof of that is while you can hear a difference in the recording studio you cannot with just the subs at home. I have run them every which way just to prove this to myself. Also a lot of subs that have L and R channel inputs, if you look at the circuit diagram they are summed inside. L and R are there for convience.

Can’t say as I blame them. If the cost is an extra irrelevant RCA connector vs answering this same question a hundred times a day till the heat death of the universe I would throw in the RCA too.

Thus, clearly, the device above is useless, unnecessary, superfluous, and ill-advised.

I would buy another sub as 2 subs are easier to integrate into your room. Otherwise, +1 imhififan has the best answer. In my opinion all subs I've tried sound better when driving through the low-level inputs.

Also a lot of subs that have L and R channel inputs, if you look at the circuit diagram they are summed inside. L and R are there for convience.

NO! If your main speakers are small monitors and started roll off at higher than 80Hz , if you connect only one channel to the subwoofer, you will loss some information from the other channel even the recording below 80Hz is mono!