Subwoofer Cabling Configuration In Wal/Ceiling - AVS Forum
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post #1 of 10 Old 06-13-2013, 12:50 PM - Thread Starter
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Hello,

Is there any noticeable performance difference between a subwoofer run via direct subwoofer cable vs. RG6 cable with F to RCA adapters? I am planning a media room renovation and want to use this path for two subwoofers:

- 110 watt AV receiver
- Monster Cable subwoofer cable under 10 feet
- keystone RCA jack
- RCA to F adapter
- RG6 QUAD cabling under 40 feet
- F to RCA adapter
- keystone RCA jack
- Monster Cable subwoofer cable under 10 feet
- 150 watt subwoofer

If it is worth it, I can indeed just install a 60 foot subwoofer cable in the wall/ceiling. Any other suggestions would be welcomed...


“Technological change is like an axe in the hands of a pathological criminal.” (Albert Einstein, 1941),
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post #2 of 10 Old 06-13-2013, 03:42 PM
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Originally Posted by Zeigh View Post

Is there any noticeable performance difference between a subwoofer run via direct subwoofer cable vs. RG6 cable with F to RCA adapters?
No. Electrons can't tell any difference. And forget about paying Monster prices, that's money down the drain. Don't pay one cent more than what Monoprice charges.

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post #3 of 10 Old 06-13-2013, 03:49 PM - Thread Starter
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HA! That's kind of what I thought, but had to ask. The "indiscriminate electron" image really drives it home.

As for the Monster Cables, I agree with you. These items were thrown in for free with the purchase of my subwoofers. Otherwise I focus on the size of the wire instead of the fancy label.


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post #4 of 10 Old 06-20-2013, 12:35 PM
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Hi Zeigh, I just installed 7 in wall/ceiling speakers but am hung up on what in-wall Subwoofer to get. From the looks of this post, it appears that you already have your sub and are just looking to cable it. May I ask what kind of in-wall sub you got?
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post #5 of 10 Old 06-20-2013, 12:53 PM - Thread Starter
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Mike,

I am not using an in-wall unit; just running the cable across the room via the ceiling/walls to a jack behind the couch and stand alone Polk model. Good luck with your subwoofer search!


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post #6 of 10 Old 06-21-2013, 04:29 PM
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How long is the cable run? For long runs (lets say 25 feet) the cable can be important. Cables that started life with 'F' connectors are optimized for cable TV station frequencies not sub-woofer frequencies.

The BlueJeans pages cover it well:
http://www.bluejeanscable.com/store/subwoofer/index.htm
http://www.bluejeanscable.com/store/subwoofer/LC1-design-notes.htm

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post #7 of 10 Old 06-21-2013, 07:20 PM
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Originally Posted by Speedskater View Post

How long is the cable run? For long runs (lets say 25 feet) the cable can be important. Cables that started life with 'F' connectors are optimized for cable TV station frequencies not sub-woofer frequencies.
True, RG cables are intended to handle frequencies well into the gigahertz range with runs hundreds of feet long, mainly by using foam insulation between the conductor and shield that insures very low capacitance. That means they have no issues at all handling the 200Hz subwoofer bandwidth, even in runs thousands of feet long. RG cable works better than audio cable, but its lack of flexibility makes it impractical in many cases.

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post #8 of 10 Old 06-23-2013, 05:27 PM
 
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RG cable is what installers use all the time for this application.  You don't need F connectors with an RCA adapter.  You can just put RCA ends on the RG cable.  There are many brands of RG connectors, some require a tool to put on the connector.

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post #9 of 10 Old 06-23-2013, 05:55 PM
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'RG' is an old military numbering system. 'RG' means Radio Grade and now only refers to the cable's approximate outside diameter and it's 'Radio Frequency Characteristic Impedance'. One brand of RG-6 cable list over 40 different model numbers, optimized for many different things.

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post #10 of 10 Old 06-23-2013, 07:10 PM
 
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There are many sizes and types of RG.  Cable and Sat installers typically use RG6 which has an 18 gauge conductor.  RG59 (20 gauge conductor) is smaller and will work fine for subwoofers and most in home applications.  Some installers use Mini-RGB (21-26 gauge depending on brand, etc.) and will work fine for a subwoofer connection.  RG11 is larger and not usually used inside the house but often used for long runs between houses or in large buildings.  There are many others.  RG59 and RG6 are the most common and the easiest to get connectors.  Make sure you get connectors for the size and type of cable.

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