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#152373 - 11/28/06 12:49 PM Subwoofer cabling questions
raz_la Offline
enthusiast

Registered: 07/07/05
Posts: 39
Loc: Baltimore, Maryland
I am about to purchase a sub for my HT. My room dimensions are 14' x 20' x 8' ceiling. I know that optimum sub placement can vary for every room layout, so my question...

How long is too long for a subwoofer cable? If I place the sub next to the tv, no problem...I can buy something around 10' and it will reach.

I may want to set the sub next to my seating area which is about 15' from the tv and a/v rack. If this is the case, I would like to run the cable up through the wall, across my ceiling, and back down the rear wall to punch out next to my sofa.

That would result in approximately 50' +/- of subwoofer cabling. Is this even possible to purchase at a reasonable price and, if so, where? Will that length negatively affect the performance of the sub?

Any thoughts or advice?
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VP100, M60ti's, HSU STF-2, Marantz SR7200, 55" Mitsubishi

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#152374 - 11/28/06 01:19 PM Re: Subwoofer cabling questions [Re: raz_la]
Hutzal Offline
connoisseur

Registered: 07/26/06
Posts: 2102
Loc: Hollywood. (Canadian @ <3)
for a 50ft cable digital coaxial look no further than Monoprice.com

50 ft high quality 24k gold plated fancy connectors CL2 (in wall) rated $11.39.



I would advise ordering this cable, running it in the wall and order a smaller (6 ft) cable. This way you can see where you like your sub the best...and if you like it in the front of the room, no big loss, only 11.39 for the 50 ft cable.


Edited by Hutzal (11/28/06 01:27 PM)
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#152375 - 11/28/06 01:24 PM Re: Subwoofer cabling questions [Re: Hutzal]
dllewel Offline
connoisseur

Registered: 06/20/05
Posts: 1189
Loc: Utah, USA
There is no problem with 50 feet or more if you use a good quality cable. Robb has given great advice, and the cable suggested will work very nice.
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M80s VP150 QS8s EP500s
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#152376 - 11/28/06 04:16 PM Re: Subwoofer cabling questions [Re: dllewel]
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 3922
Loc: Up yonder
I’ve used a 30’ cable from Axiom and now I’m using a 40’ cable from Blue Jeans cables. They both work just dandy.

But now I am thinking about terminating cable at the wall J-boxes and then using shorter cables from J-box to the sub. Has anyone done that before? I was a little leery about splicing / terminating Coax sub cables. Are they the same as RG6 or similar Coax??
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#152377 - 11/28/06 04:18 PM Re: Subwoofer cabling questions [Re: michael_d]
Hutzal Offline
connoisseur

Registered: 07/26/06
Posts: 2102
Loc: Hollywood. (Canadian @ <3)
Quote:

I’ve used a 30’ cable from Axiom and now I’m using a 40’ cable from Blue Jeans cables. They both work just dandy.

But now I am thinking about terminating cable at the wall J-boxes and then using shorter cables from J-box to the sub. Has anyone done that before? I was a little leery about splicing / terminating Coax sub cables. Are they the same as RG6 or similar Coax??




You could stuff the excess cable into the wall, and get a coupler type wall plate, no splicing would be needed.
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#152378 - 11/28/06 05:19 PM Re: Subwoofer cabling questions [Re: Hutzal]
raz_la Offline
enthusiast

Registered: 07/07/05
Posts: 39
Loc: Baltimore, Maryland
Thanks for the information. I have the same question...it appears that the cable from monoprice is something that I might pick up from Home Depot, minus the connections. Is it just standard RG6 coaxial cable because it looks just like the stuff running from my cable outlet to my DirecTV receiver.

If that is the case, I would like to have nice and clean connections through my walls with a cable tv type wall plate at each place that it comes out of the wall.

Just as mdrew said, however, is it O.K. to splice that type of connection? In my case, I would go from the receiver to a wall, splice, go up the wall and over the ceiling down the rear wall, splice, and then connect to the sub. Does that make any sense?
_________________________
VP100, M60ti's, HSU STF-2, Marantz SR7200, 55" Mitsubishi

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#152379 - 11/28/06 06:01 PM Re: Subwoofer cabling questions [Re: raz_la]
Hutzal Offline
connoisseur

Registered: 07/26/06
Posts: 2102
Loc: Hollywood. (Canadian @ <3)
>>is it O.K. to splice that type of connection? In my case, I would go from the receiver to a wall, splice, go up the wall and over the ceiling down the rear wall, splice, and then connect to the sub. Does that make any sense?

I am not sure about splicing, I'll let someone else answer that question.

But for simplicities sake, you can order 2 wall plates for keystone entries for $1.00 each:



and 2 RCA Modular connector keystone inserts ($0.98) I am not sure what modular is...But I think this is the one.:



And you'll have a really easy install for only $4 more.
_________________________
Producer | Composer
www.robbhutzal.com

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#152380 - 11/28/06 07:27 PM Re: Subwoofer cabling questions [Re: Hutzal]
BrenR Offline
connoisseur

Registered: 12/10/03
Posts: 3602
Loc: Winnipeg MB Canada
Quote:

I am not sure what modular is...


Modular - having to do with modules... ie: you can fill the little square holey-thingy with an F-connector, RJ-11, RJ-45, binding posts, or whatever modules you need.

Bren R.

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#152381 - 11/28/06 09:44 PM Re: Subwoofer cabling questions [Re: Hutzal]
raz_la Offline
enthusiast

Registered: 07/07/05
Posts: 39
Loc: Baltimore, Maryland
Quote:

>>I am not sure about splicing, I'll let someone else answer that question.

But for simplicities sake, you can order 2 wall plates for keystone entries for $1.00 each:



and 2 RCA Modular connector keystone inserts ($0.98) I am not sure what modular is...But I think this is the one.:



And you'll have a really easy install for only $4 more.




I guess that's what I'm getting at. I would go from the receiver to the first wall plate, cut the cable and put an RCA connector on it and connect it to the wall plate.

Next, go into the wall and connect more cable to the backside of the first wall plate and run that up and over my ceiling and down the rear wall. There, I would connect to the back of that wall plate in the wall.

Finally, connect with an RCA connector from the sub to the second wall plate.

Voila!, enjoy the fruits of my labor!

I guess the word splice probably was not the correct term for what I was thinking.
_________________________
VP100, M60ti's, HSU STF-2, Marantz SR7200, 55" Mitsubishi

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#152382 - 11/28/06 10:50 PM Re: Subwoofer cabling questions [Re: Hutzal]
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16298
Loc: Leesburg, Virginia
Modular, like Bren's love doll.
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"I wish I had documented more…" said nobody on their death bed, ever.

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#152383 - 11/28/06 11:08 PM Re: Subwoofer cabling questions [Re: pmbuko]
St_PatGuy Offline
axiomite

Registered: 03/07/05
Posts: 7413
Loc: Glendale, Arizona
Do you suppose he calls his *thing* an f-connector or an RJ-45?
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"Nothin' up my sleeve. . ." --Bullwinkle J. Moose

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#152384 - 11/28/06 11:37 PM Re: Subwoofer cabling questions [Re: raz_la]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10412
Raz, the losses in coaxial cable(regardless of whether it's 18ga RG6 or thinner)at audio frequencies are so low that they don't become significant until hundreds of feet are involved. If it's more convenient for you to splice, there's no problem.

As far as sub positioning, don't take the "every room is different" thing as a given. Your room dimensions are quite good from the standpoint of modes and the general rule for such a room is that both the strongest and smoothest response is likely to be had by positioning it directly in the corner which is farthest away from an opening.
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