atavid Posted August 10, 2013 Posted August 10, 2013 After pressure from the family i've rolled over and am attempting to connect up a subwoofer to our TV system.Previously i had a different configuration in my media room, and after setting up 7.1 surround sound ,quickly found it irksome and went back to stereo only.But as a compromise today i've agreed to at least re-connect up a sub to make the sound a bit 'fuller' to please the younger bull in the house. Previously i had the sub connected to the AV receiver via the single RCA sub output into the single LFE RCA input on the sub,but this is not now possible because i have no way of getting a shielded cable to the sub in the position it has to be in. BUT i do have a single speaker connection in that position. I'm trying to find out if i can simply connect from the single speaker wall connection (+/-) to the input speaker connections on the sub. I have a wall plate already close to the sub where i used to have my right rear (now gone) speaker,but of course its only one channel. So...since its a sub, can i bridge the left and right speaker connections on the sub inputs and connect to my right speaker wall plate which i can connect to one of the speaker channels on the AV receiver.The next question is of course which speaker connections do i use on the receiver? Sorry if that all sounds too convoluted,i'll attach some pics to help clarify(i hope) Thanks for any advice offered.
alexc Posted August 10, 2013 Posted August 10, 2013 Hmm, You may be able to use the LFE output, connect it to one of the wall plugs and use a speaker to RCA on the other end to connect to the sub. I don't think you could use the speaker outputs on the receiveer as they would be sending down too much power.
atavid Posted August 10, 2013 Author Posted August 10, 2013 Thanks alecx,i did try that and it didnt work too well,something to do with unshielded speaker wire carrying a low level signal i am led to believe. What im asking/suggesting is as per the attached diagram? Excuse my crappy drawing please.
Paul Spencer Posted August 11, 2013 Posted August 11, 2013 Does your sub plate amp have high level inputs? It's either that or low level (RCA) input from the preamp, pre out or AV receiver sub out.
davewantsmoore Posted August 11, 2013 Posted August 11, 2013 I hope my son is like this.... Dad please hook up more subwoofers to the TV !?!
atavid Posted August 11, 2013 Author Posted August 11, 2013 Hi Paul,thanks.Yes the sub has three input types.The high level speaker connections,a set of stereo pre-amp inputs,and a single LFE input. My problem is i only have one option(mabye not even that) to connect to the sub and that is via the high level speaker connections. To further complicate matters i only have one speaker(one red and black) connection available to connect at the sub woofer location. So im wanting to know if i can send a signal from the AV receiver to the two channels on the sub woofer possibly by bridging the two right speaker sub connections and bridging the two left channel speaker sub connections. At the receiver end, i would like to create the signal by using the positive or red terminal from say, the front right channel and connecting to the negative or black terminal of the front left channel on the receiver. Would that work to basically create a mono signal from the front speakers i can send down to both channels of the sub ??(bear in mind i dont connect anything to my front speakers so those connections are available) Whew !
Paul Spencer Posted August 11, 2013 Posted August 11, 2013 It's really quite simple. Connect the subwoofer in parallel with one of the speakers. Job done. It doesn't need to be any more complicated than that. Speaker cable from the speaker terminals to the high level inputs.
atavid Posted August 11, 2013 Author Posted August 11, 2013 Thanks Paul,im sorry to be so thick. This connection is a little out of my experience so i would rather be safe than sorry.Couldnt stand to have to send away any of my gear for repairs. Would you be kind enough to look at my (very bad) drawing and see if what i have in mind will achieve my objective.
Paul Spencer Posted August 11, 2013 Posted August 11, 2013 Looks like your subwoofer has high level inputs and outputs and they allow for the left and right channels. So do it this way: Connect from amp to high level inputs on sub. You have connections for right and left channels. Connect another cable from high level outputs on the sub to the main speakers, one cable for left, one for right. So you have two speaker cables going from amp to sub, two from the sub amp to the mains.
atavid Posted August 11, 2013 Author Posted August 11, 2013 (edited) Thanks Paul,i know i'm not explaining myself well.This is my set up and situation. AV receiver which is only used with centre speaker...no front left or rights...no rear left or rights. I was quite content with centre channel only, no sub woofer. Son decides i need to add a subwoofer. Subwoofer position does not allow for running any addition cabling.Subwoofer has to be at rear of room 6 metres away from receiver. This position does have one set of speaker binding posts ( in wall cabling )previously used for left rear speaker in 5.1 system. Dont want to run any additional speakers other than centre channel and subwoofer. Want to connect subwoofer via old unused left rear speaker binding posts. So i cant get a stereo signal down to the sub only a positive and a negative which is one channel. . Therefore i cant connect a stereo signal to all 4 sub high level speaker inputs.I'm assuming i have to connect to all 4 (2 reds/2 blacks) to effectively connect to both channel amps in the sub. My idea then was to 'mono' the stereo signal from the receiver by taking the + POSITIVE signal from the front right speaker terminal and the -NEGATIVE signal from the front left speaker terminal. At the sub end then i would simply connect the two +positive terminals together and the two negative terminals together to send the same mono signal to both channels of the sub. Remember i have no possibility of running any additional cable from the receiver to the sub. Jeez i'm getting myself confused now. Edited August 11, 2013 by atavid
DoggieHowser Posted August 11, 2013 Posted August 11, 2013 Remember i have no possibility of running any additional cable from the receiver to the sub. I used this last time to run the LFE wirelessly. http://audioengineusa.com/Store/Audioengine-W3 You just need a mini stereo to RCA cable. (one is provided) The USB can be used for computer audio and as a power source. The source can either be the PC or the mini stereo line input.
Paul Spencer Posted August 12, 2013 Posted August 12, 2013 Thanks Paul,i know i'm not explaining myself well.This is my set up and situation. AV receiver which is only used with centre speaker...no front left or rights...no rear left or rights. I was quite content with centre channel only, no sub woofer. Son decides i need to add a subwoofer. Subwoofer position does not allow for running any addition cabling.Subwoofer has to be at rear of room 6 metres away from receiver. This position does have one set of speaker binding posts ( in wall cabling )previously used for left rear speaker in 5.1 system. Dont want to run any additional speakers other than centre channel and subwoofer. Want to connect subwoofer via old unused left rear speaker binding posts. So i cant get a stereo signal down to the sub only a positive and a negative which is one channel. . Therefore i cant connect a stereo signal to all 4 sub high level speaker inputs.I'm assuming i have to connect to all 4 (2 reds/2 blacks) to effectively connect to both channel amps in the sub. My idea then was to 'mono' the stereo signal from the receiver by taking the + POSITIVE signal from the front right speaker terminal and the -NEGATIVE signal from the front left speaker terminal. At the sub end then i would simply connect the two +positive terminals together and the two negative terminals together to send the same mono signal to both channels of the sub. Remember i have no possibility of running any additional cable from the receiver to the sub. Jeez i'm getting myself confused now. In that case, simply connect the left or right channel to the subwoofer high level inputs. You don't need to sum outputs. I used this last time to run the LFE wirelessly. http://audioengineusa.com/Store/Audioengine-W3 You just need a mini stereo to RCA cable. (one is provided) The USB can be used for computer audio and as a power source. The source can either be the PC or the mini stereo line input. We sell a Dayton wireless product that would work here. It takes the LFE signal (RCA) and transmits wirelessly, then receives the signal at the sub end.
Benje Posted August 12, 2013 Posted August 12, 2013 Paul how much for the Dayton wireless product? I might have a use for one or two of those. Benje
Paul Spencer Posted August 12, 2013 Posted August 12, 2013 Paul how much for the Dayton wireless product? I might have a use for one or two of those. Benje The answer is here: http://www.theloudspeakerkit.com/dayton-sub-link-xr-wireless-sub-transmitter-receiver/
atavid Posted August 12, 2013 Author Posted August 12, 2013 Thanks Paul,ok, it seems i can connect how i wish and dont need to 'sum" the high level inputs on the sub.That was the word i was looking for but couldnt remember.. "sum". Thanks DoggieH too for your suggestion of the wireless unit.I didnt realize that such a beast existed.The one Paul suggested looks good too,it seems to come with 2x 240v power packs while the Audio engine only comes with one.I see you can get an additional unit for $18 though so no big deal. I might try Pauls suggestion of connecting to the high level inputs and see how that goes first.
Recommended Posts