Results 1 to 9 of 9
  1. #1
    Forum Regular
    Join Date
    Apr 2007
    Posts
    11

    hook up subwoofer as stereo or mono?

    Current setup:

    Sony STR-DE835 5.1 receiver - 100W per channel
    Polk RC85I in-wall surround speakers (5) 8 ohms 100W per channel
    JBL HTI88 in-wall passive subwoofer 250W max
    Onkyo M-282 2 channel amp 100W per channel at 8 ohms, 125W at 6 ohms

    I have the Onkyo amp connected to the JBL sub. The sub has 2 8" woofers, and my Sony receiver has 2 sub outputs. So should I set it up as mono or stereo? I have the JBL installed vertically on the wall, so the Right would be on top and Left on bottom if stereo is used. Is there really a noticeable difference?

  2. #2
    Suspended markw's Avatar
    Join Date
    Dec 2001
    Location
    Noo Joisey. Youse got a problem wit dat?
    Posts
    4,659

    neither.

    You need to feed that ".1" subwoofer/LFE output to a mono (single channel) amplifier that can handle a four ohm load, and that amplifier's output to the subwoofers, which would be hooked in parallel. I'd recommend a plate amp from parts express or something similar.

    Either that, or you can use a stereo amp that can hanble eight ohms for each subwoofer. It's your choice.

    In either case, your sony won't drive them. It'll have it's amps fully utilized by the other channels.

  3. #3
    Forum Regular
    Join Date
    Apr 2007
    Posts
    11
    thanks for the advise. I already found out my sony won't drive them. So I figure the M-282 can handle it since I'm not using that amp for anthing else. I am trying to find out whether to hook it up as a mono or stereo output. Since my Sony has 2 RCA outputs (though neither are designated L or R) I first thought stereo would be the way to go.

    Quote Originally Posted by markw
    You need to feed that ".1" subwoofer/LFE output to a mono (single channel) amplifier that can handle a four ohm load, and that amplifier's output to the subwoofers, which would be hooked in parallel. I'd recommend a plate amp from parts express or something similar.

    Either that, or you can use a stereo amp that can hanble eight ohms for each subwoofer. It's your choice.

    In either case, your sony won't drive them. It'll have it's amps fully utilized by the other channels.

  4. #4
    Forum Regular
    Join Date
    Mar 2003
    Location
    halifax,nova scotia,canada
    Posts
    1,083
    You can hook it up in stereo mode,but i think the only benefit you would get is a little more volumn.If you do hook it up this way make sure that you remove the strips or it could be bad.The LFE output is not a stereo signal anyway.

    bill
    Speakers-Jm Labs
    Disc player-Sim Audio Moon Calypso
    Pre-amp-Sim Audio P-5.3 SE
    dac= sim audio moon 300d

    Amp-Sim Audio Moon I-3
    Display-Toshiba CRT
    Wires and Cables-Kimber,Straight Wire, ixos, Gutwire and shunyata research
    Sacd-Cambridge Audio
    Bluray--Sony and Cambridge Audio
    Remote-- Harmony 1100

    Power-- Monster

  5. #5
    Forum Regular
    Join Date
    Feb 2003
    Posts
    103
    If you just have one JBL sub, then there is no need to hook it up
    in stereo....If you buy another sub in the future then maybe hook
    it up stereo....I have 2 sub outputs on the back of my B&K preamp,
    and at one time had two subs ( HSU VTF-2's) but I never hooked them
    up in stereo, just ran a second sub cable from the first sub's output
    to the second subs input. Chances are your JBL sub has a left and
    right input...which confuses alot of people because they only have
    one sub output on their receiver. If you use a "Y" adaptor into the
    the left and right inputs on the sub, and /or the receiver, I dought
    it will make any difference sonically....maybe a slight increase in
    volume as musicman has pointed out......vardo
    Last edited by Vardo; 06-10-2007 at 06:08 PM.

  6. #6
    Forum Regular
    Join Date
    Apr 2007
    Posts
    11
    Thanks everyone. I hooked it up mono and it sounds great. That amp really pushes the JBL sub. I might look into a plate amp for it so I can use the Onkyo sub for my rears which are currently powered by my Sony.

  7. #7
    Forum Regular
    Join Date
    Mar 2003
    Location
    halifax,nova scotia,canada
    Posts
    1,083
    I don't believe your reciever has pre-outs so you would be unable to do so.If it does however use it for the front speakers,you would get more use from it.

    bill
    Speakers-Jm Labs
    Disc player-Sim Audio Moon Calypso
    Pre-amp-Sim Audio P-5.3 SE
    dac= sim audio moon 300d

    Amp-Sim Audio Moon I-3
    Display-Toshiba CRT
    Wires and Cables-Kimber,Straight Wire, ixos, Gutwire and shunyata research
    Sacd-Cambridge Audio
    Bluray--Sony and Cambridge Audio
    Remote-- Harmony 1100

    Power-- Monster

  8. #8
    Forum Regular
    Join Date
    Apr 2007
    Posts
    11
    Thanks Bill. You are right I checked and I dont' ahve any pre-outs. I'll be getting a new receiver in the next 6 months so that problem will be fixed.

    Quote Originally Posted by musicman1999
    I don't believe your reciever has pre-outs so you would be unable to do so.If it does however use it for the front speakers,you would get more use from it.

    bill

  9. #9
    Forum Regular
    Join Date
    Mar 2003
    Location
    halifax,nova scotia,canada
    Posts
    1,083
    Happy to be of assistance.

    bill
    Speakers-Jm Labs
    Disc player-Sim Audio Moon Calypso
    Pre-amp-Sim Audio P-5.3 SE
    dac= sim audio moon 300d

    Amp-Sim Audio Moon I-3
    Display-Toshiba CRT
    Wires and Cables-Kimber,Straight Wire, ixos, Gutwire and shunyata research
    Sacd-Cambridge Audio
    Bluray--Sony and Cambridge Audio
    Remote-- Harmony 1100

    Power-- Monster

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •