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REL .LFE input

I just purchased the Technics SU-G700 integrated and it has a left and right pre-out that can be used for a subwoofer - my REL. 

 

I’m currently using the high level connection but thought about trying the LFE connection as a way to reduce a very low level hum I’m getting in the subwoofer. No amount of connecting he system to one power outlet or grounding has solved it, and it only happens once the speakon connection is connected to the subwoofer. 

My only issue with this LFE solution is that there is only one single input on the subwoofer, but the pre-out is in stereo. The question is how much audio low bass information am I losing if I only run one RCA from, say,  the right channel on the integrated to the sub.

BTW, this is a dedicated two channel set up, not used for TV. 

last_lemming
bigtwin's avatar
bigtwin
1,130 posts
 

My guess is it's up to the mix on each recording.  The bass is often positioned in the center, and that mix has equal bass on both channels,  so you would be fine.  Again, it would depend on the mix.  

lalitk's avatar
lalitk
5,070 posts
 

@last_lemming

Have you consulted with REL regarding hum? The high level speakon connection is the ideal way to connect REL subs. I own a pair of REL’s and they are dead quiet using high level connection from my Integrated. You may have too much gain, try ‘floating’ the yellow wire and connect only red wire to positive binding post. Please make sure to mask the exposed yellow wire with electrical tape before turning on the sub and Integrated. 

jwpstayman
388 posts
 

In most cases, the hum is caused by having a cable box or satellite dish being grounded at a different point in the house and you trying to feed the audio signal from the tv/monitor to the system.   Disconnect that input on your integrated and see if the hum goes away.  If it does, then the solution is a Jensen Iso-Max. Fix the hum - do not use the low level input.

mofojo
2,172 posts
 

My understanding is bass around 100hz and under is not stereo. 
 

If you want to be sure just buy a 2 into 1 splitter. LH and RH outputs will be summed into a single plug for your sub. 

audiorusty
265 posts
 

Why not just use the left and right low level inputs? Or does your REL not have them?

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