sub cable question ???

espcrowe
espcrowe Posts: 4
edited December 2010 in Subwoofer Hookup & Bass Management
im new to the site so hello to everyone...... I was informed by an employee at Furture Shop today that single ended sub cable was enough for a sub that is set up for left/right plug ins. Is he correct or am I going to lose performance in my sub. Any advise would be greatly appreciated??? heres a picture
82-290-035-11.jpg
similar to the back of my sub....thanks
Post edited by espcrowe on
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  • cnh
    cnh Posts: 13,284
    edited December 2010
    WELCOME TO CLUB POLK!

    The PSW 10 does not have a single LFE IN but since the sub out on a receiver is a mono signal that might work. I've never used this sub?

    But, if it were me, I would use a Y cable into the L/R INs on the sub above, from a single ended cable from the AVR LFE or SUB-out.

    What does the Polk Manual say to do?

    cnh
    Currently orbiting Bowie's Blackstar.!

    Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
    [sig. changed on a monthly basis as I rotate in and out of my stash]
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  • espcrowe
    espcrowe Posts: 4
    edited December 2010
    The manual shows using Y into L/R ...but the future shop didnt have any of these cables and the guy said a single sub cable would work ....
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  • WilliamM2
    WilliamM2 Posts: 4,775
    edited December 2010
    Is it a PSW10? Should be ok with or without the Y cable:

    http://www.polkaudio.com/forums/showthread.php?t=40723
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  • comfortablycurt
    comfortablycurt Posts: 6,745
    edited December 2010
    You'll be fine with just a single cable. Connect it to one of the inputs, and that input will effectively act as an LFE input.
    The nirvana inducer-
    APC H10 Power Conditioner
    Marantz UD5005 universal player
    Parasound Halo P5 preamp
    Parasound HCA-1200II power amp
    PolkAudio LSi9's/PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Speaker Cables and IC's
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  • espcrowe
    espcrowe Posts: 4
    edited December 2010
    would it be louder if i used a Y cable???? the sub came with the rm6750 audio package...it was a xmas present from my girlfriend....one more thing should i unplug the sub when im not using it.... i noticed it doesnt have an on off button....thanks...
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  • txcoastal1
    txcoastal1 Posts: 13,283
    edited December 2010
    The switch labeled on-auto/off is the power switch
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • espcrowe
    espcrowe Posts: 4
    edited December 2010
    txcoastal1 wrote: »
    The switch labeled on-auto/off is the power switch

    ok....thanks....
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  • samnor
    samnor Posts: 155
    edited December 2010
    espcrowe wrote: »
    would it be louder if i used a Y cable???? the sub came with the rm6750 audio package...it was a xmas present from my girlfriend....one more thing should i unplug the sub when im not using it.... i noticed it doesnt have an on off button....thanks...

    you may get a 3db output boost since you are effectively sending a mono signal on both the inputs so the output would typically be summed...also can help turn on the sub (trigger) at lower levels due to the summing...some people have issues with the sub not turning on automatically during certain scenes that may have low LFE so the y adaptor could help there...
    Fronts: Wharfedale diamond 9.6
    Sub: Wharfedale sw250
    Rears: Wharfedale diamond 9.1
    Center: Paradigm cc-350
    Pre-amp: Oppo dv981hd
    Amp for fronts: Parasound hca-1500a
    Amp for rears: Adcom gfa-5400
    Amp for center: Marantz MA500 monoblock
    Polk multimedia speakers for PC setup
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  • comfortablycurt
    comfortablycurt Posts: 6,745
    edited December 2010
    samnor wrote: »
    you may get a 3db output boost since you are effectively sending a mono signal on both the inputs so the output would typically be summed...also can help turn on the sub (trigger) at lower levels due to the summing...some people have issues with the sub not turning on automatically during certain scenes that may have low LFE so the y adaptor could help there...

    I don't see how a Y adapter would help with the auto turn off.

    The solution to that issue would be to turn up the sub level in your AVR, and compensate for the increased volume level by turning down the gain on the sub itself. This causes the sub to sense a higher voltage input, and prevents the sub from turning off during quiet passages.



    Also, I can't see how it would be louder with a Y cable. It's still receiving the exact same signal from the AVR...and thus should be the same volume. Either way, the volume levels can be compensated for in setup.
    The nirvana inducer-
    APC H10 Power Conditioner
    Marantz UD5005 universal player
    Parasound Halo P5 preamp
    Parasound HCA-1200II power amp
    PolkAudio LSi9's/PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Speaker Cables and IC's
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  • samnor
    samnor Posts: 155
    edited December 2010
    in my personal experience, I did get a boost due to the "summing" that I mentioned above. IF you search for y adaptor 3db output boost, there are a lot of other forum posts talking the same thing...

    I dont want to post forum links so I'll post one from aperion audio.. ymmv on whether you indeed get a boost as I said above as well...

    http://www.aperionaudio.com/product/Aperion-HP-Y-Adapter,52,0.aspx
    Fronts: Wharfedale diamond 9.6
    Sub: Wharfedale sw250
    Rears: Wharfedale diamond 9.1
    Center: Paradigm cc-350
    Pre-amp: Oppo dv981hd
    Amp for fronts: Parasound hca-1500a
    Amp for rears: Adcom gfa-5400
    Amp for center: Marantz MA500 monoblock
    Polk multimedia speakers for PC setup
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