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Technical Questions re: Grounding and Connection

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In Reply to: RE: Stereo Subs posted by Sibelius on May 25, 2025 at 09:50:56

REL provides a cable that includes a grounding wire. I have no ground screw on my amp, and their other suggestion is to use a chassis screw which on my amp are not prominent enough to use. Is a ground essential? I don't see any other manufacturer suggesting it, just regular IC's or speaker cables for the "high level" connection. Waiting to hear back from REL and LTA about other options.
Also, I've seen something about connecting the sub directly to the main speakers. Is that something that can be done? I don't have "bi wire" capable connections on my speakers, so I would have to use two cables to each terminal for the stereo subs. Always afraid I'm going to blow something up!
Sure would be easier to just get the Quads or the ATC SCM40A's!
ETA: Probably a dumb question, but If wireless turns out to be an option, for stereo subs I assume I would need 2 transmitters and receivers correct?

Edits: 05/26/25 05/26/25

Follow Ups:

RE: Technical Questions re: Grounding and Connection - E-Stat 11:28:17 05/26/25 (2)
for stereo subs I assume I would need 2 transmitters and receivers correct?

In my case, no. The HT processor has a single LFE output so I use one transmitter and two receivers. Which brings to mind another consideration. That room has a nasty mode centered around 80 hz which was attenuated with the processor's parametric EQ on that channel.

Not something I either have nor need in the main music system upstairs.
- RE: Technical Questions re: Grounding and Connection - Sibelius 11:31:26 05/26/25 (1)
  REL has their Arrow Wireless system. A little pricier than yours. I have to say, their manuals leave a lot to be desired. JL Audio wins hands down on that score.
  - Just be open - E-Stat 11:38:16 05/26/25 (0)
    to other sub positions than directly below or near mains.
    
    I did that at first in original room but later I found that placing them behind me worked just as well. I'm convinced that distributed coverage is beneficial.

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