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 Message Boards » » Connecting a Subwoofer pre-out Page [1]  
Grandmaster
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ok so i'll nub myself here RE: home theater.



The connection on the sub i had before matched the one on the back of the receiver, even though the sub didn't belong to the original set.


Now, the connections on the sub i have are bare wires, + and -

What would be the best way to go about hooking it up? Is it as simple as splicing one or both poles into a phono/RCA jack ?

6/13/2007 10:16:41 AM

stowaway
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sounds like the sub has speaker level input and that receiver doesn't have speaker level sub output. The line level (rca) output won't be anywhere near enough power to make the sub work. You need to have the sub preout go to an amplifier, then to the sub.

6/13/2007 10:29:04 AM

Grandmaster
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yeah i just realized my last sub was powered and was about to edit the post.

>.<

basically my friends Panasonic SC-HT900 blew something. Perhaps the wiring in this house isn't grounded for shit...hell even most of the outlets are still two prong and don't have a ground/third prong(though I wasn't using any of these at the time). It happened when i was moving our cable's DVR box on top of the receiver while audio out was plugged into the panasonic inputs. Sparks shot out of either the DVR or the stereo. Now anytime you use anything but DVD or radio...or have any kind of input..AUX, front ipod/miniphono, TV input connected the stereo goes ape shit with feedback and interference.




There are extra outputs for another set of secondary "front" speakers. Could I use a channel from that?

[Edited on June 13, 2007 at 10:37 AM. Reason : .]

6/13/2007 10:35:28 AM

Wyloch
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Yes. Actually, that's all you can do, by the sound of it.

6/14/2007 3:47:16 PM

moron
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Make sure the impedance on the sub match the amp before you hook them up to the amp (should be printed on the sub).

Those HTIB subs don't usually work with regular HT amps.

6/15/2007 1:33:07 AM

Grandmaster
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so i can or cannot use the spare front channel output to power the sub

[Edited on June 15, 2007 at 2:15 PM. Reason : marked "front remote"]

6/15/2007 2:15:22 PM

moron
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It should say something like 4O or 3O on the sub.

The receiver is probably only rated for 6O or 8O (also should be on the receiver).

edit:
That should be the symbol for ohms but TWW is messing it up...

[Edited on June 15, 2007 at 4:31 PM. Reason : ]

6/15/2007 4:30:36 PM

Grandmaster
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sub is 4Ohms

dunno what the receiver is

6/15/2007 4:43:31 PM

Grandmaster
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sub is 4Ohms

dunno what the receiver is


doublepost ftw

hmm, looks like it's cut off on the diagram, let me go look.

so if it's anything other than 4, i can't use it?

[Edited on June 15, 2007 at 4:45 PM. Reason : .]

6/15/2007 4:44:20 PM

moron
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On the very far right of the graphic you posted, it looks like it says "4 ohm min" so it might be okay.

The last thing to do is to check to see how your receiver feels about mix/matching ohms, this would be in the manual. I would say it would probably work fine, but it's also possible (but unlikely) that the amp might overheat, or you'll lose some sound quality (that's a crappy sub, so you'll be losing sound quality regardless ).

6/15/2007 4:47:58 PM

Grandmaster
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it's actually 6 :\

6/15/2007 5:00:57 PM

 Message Boards » Tech Talk » Connecting a Subwoofer pre-out Page [1]  
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