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Thread: SVS trouble

  1. #1

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    Default SVS trouble

    I have a brand new PC PLUS 16-46 runing on the preout's on my ES sony receiver. When turning the sub up to feal good auto-gun fire like in {We where solders} and they drop a bomb the sub cant take it and cracks, bottoming out, it just cant handle the peakes on a lot of thing. My room is verry small so i know its not that.This thing should kick ass but i'm kicken myself know. Any thought

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    You need to calibrate your system with an SPL meter.

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    Quote Originally Posted by toddco
    I have a brand new PC PLUS 16-46 runing on the preout's on my ES sony receiver. When turning the sub up to feal good auto-gun fire like in {We where solders} and they drop a bomb the sub cant take it and cracks, bottoming out, it just cant handle the peakes on a lot of thing. My room is verry small so i know its not that.This thing should kick ass but i'm kicken myself know. Any thought
    Any chance it is the AVR that is clipping, not the sub? i.e. the AVR is sending a distorted signal to the subwoofer.

    Go into the setup on your AVR and verify that the channel for the subwoofer is set to 0 or less. Just a thought - you are correct, it should be knocking your socks off. If that does not work give SVS a call tomorrow - I am sure they will set you straight.

    Michael

    (to test - you might set your AVR to sub = off and plug your sub into the pre-out for one of your front channels just to see what happens.)
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

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    Try using the LFE out on your receiver, not the R/L pre-outs. This way any bass management controls on the receiver will work for you. I have the 20-39 PC+, and if it's cracking then you are overdriving it somehow. Start with the gain on the SVS at about 1/4 of the way up. Check your sub settings in the receiver and make sure they are at 0, and ideally around -5. Then start calibrating. Once calibrated, make sure you have tight socks on and all the pictures are firmly mounted on the walls :D
    DKG999
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    HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED

    Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC

  5. #5

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    Have a spl meter and used it with disc from svs and sub is pluged into pre-out

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    Make sure you have your subsonic filter on the correct setting on the sub also. If you dont have any ports plugged then it should be on the "16hz" setting.

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    I have tryed no pluges and one plug with the amp set for each. Same problem

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    i too have a sony es receiver and a 20-39 pc plus hooked up through the preouts. No problems here. Do you have another sub to try the amp with? Maybe try an A/B test with 2 subs to see if its the sub or amp. But it sounds like its the sub so id call svs...

  9. #9

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    Calibrate! Sub into "sub out". Set to small. What is your sub out set to? It should be to atleast 0 or below. Your sub gain should be no more than 50%.
    PS3 and HD Front Projection, life is good. Too bad Blu-Ray and the PS3 are already obsolete.....

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    what do you have the volume knob on the back of the SVS set to? do you have it cranked beyond 12 o'clock? if so.. turn it down to 10 or 11 o"clock. if it bottoms out even on low volumes. then you got other problems.

    call SVS in that case then.

    good luck.
    PolkFest 2012, who's going>?
    Vancouver, Canada Sept 30th, 2012 - Madonna concert

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    That SVS is a good sub but if you run it too hard it will chuff and bottom out. I used to have one of their cylinder subs and that is why I upgraded. I second the calibration for yours just to make sure.
    Sharp Elite 70
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    Polk Atrium 7s on the patio just to keep my foot in the door.

  12. #12

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    One cannot simply put in place an SVS sub and turn the volume up on it and expect trouble/problem free operation. Proper calibration is an absolute requirement, as I have learned. In addition, proper room placement can have a HUGE effect on bass. With sub frequencies, the ROOM is the sub enclosure.

    Search around for proper sub placement techniques. With large subs, this is tough, but one way is to place the sub in your listening location, and crawl around the room listening for the spot where bass is most pleasing to you. Put your sub there.

    Both of my subs are properly calibrated and the gains on them are barely 1/4 way up - but there's enough bass to energize the concrete floor. If I turned them up to 1/2, they would bottom out when given tough tasks.

    Why then do they make amps with extra gain? Because all rooms are different.
    HT/music rig
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    All is calibrated, is in the left- right pre-out,never go past 11 o'clock on the gain.Guess i need dual pb12+2, A?

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    I have had this on a second receiver diffrent room same problem

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    Quote Originally Posted by toddco
    All is calibrated, is in the left- right pre-out,never go past 11 o'clock on the gain.Guess i need dual pb12+2, A?
    Can you elaborate on why you are using the L+R pre outputs on the receiver for the subwoofer. Do you have the LFE turned off and the front L+R set to full range (should default to this I believe)? Are you aware of there is a difference between the signal content of the LFE and L+R pre outs?

    As others have suggested, use the LFE output to the sub. Adjusting the 'subwoofer' output level on the SSP (receiver) will have no effect when you connect the sub using the pre outs.

    Am I missing something here?

  16. #16

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    Call / Email SVS.
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.

  17. #17

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    Yes, no ajust effect with the pre-out being used. Using the pre-outs because polk says its the only way to go if you want to do it right. LFE out same problem.

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    Where do you have the gain control set on the back of the sub? (like about 11:00 or less?) What is your sub channel set to in the AVR? (provided you are using your LFE out on your AVR) Do you have the sub end of the cable plugged into the unfiltered or lfe in on your sub?

    Set up like this (just for testing and to humor us):

    in AVR - set sub to on, set all other speakers to small (80hz crossover), set sub channel (the speaker balance part) to 0.
    hook sub cable from LFE out on your AVR to LFE in on your sub.
    turn sub amp to 10:00-11:00 position.

    Play movie of your choice and let us know what happens.

    Michael
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

  19. #19

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    Call or email SVS. Their tech support is fantastic (just like Polk)! :D
    H/K AVR 635 receiver
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    Panamax 5100
    RTi8 fronts (200 watts/channel from bi-amping)
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    SVS 20-39 PCi
    AQ Type 8 speaker wires (fronts/center)
    AQ Type 2 wire for FXi5's
    AQ Diamondbacks-Fronts & center powered by Rotel
    AQ I/C throughout

    Harmony 880

    My System Pics

  20. #20

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    honestly, i find it VERY difficult to bottom out an SVS if everything is set up properly.. unless of course. something went bad in transit to your place.

    I know other Polkies have bottomed out their SVS's before.. but I never have.. and like i said earlier. it's very difficult to do, not impossible, just not easy.

    so toddco, what else can you tell us about your AVR settings? in the menu is the sub volume set to 0 ? are you running two pre out RCA cables to your sub? If so.. unplug one and only use one from your pre out.

    At what volume does it bottom out? Buying a larger SVS may help.. but it still doesn't account for what you are saying that your current sub is bottoming out.

    Maybe the amp is shorted out or something.
    PolkFest 2012, who's going>?
    Vancouver, Canada Sept 30th, 2012 - Madonna concert

  21. #21

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    Do not use the L or R repout, use the Sub pre-out. You're sending a full range signal not the LFE. Use the SVS setup tips not Polk.

    Combo rig:

    Onkyo NR1007 pre-pro, Carver TFM 45(fronts), Carver TFM 35 (surrounds)
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  22. #22

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    Quote Originally Posted by Ron Temple
    Do not use the L or R repout, use the Sub pre-out. You're sending a full range signal not the LFE. Use the SVS setup tips not Polk.
    Yep, that is what the sub-out/lfe is for.
    PS3 and HD Front Projection, life is good. Too bad Blu-Ray and the PS3 are already obsolete.....

  23. #23

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    he says he's tried the LFE output as well with same results.

  24. #24

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    Yes full signal that is Y the amp has a crossover and is being used with one cable. I know SVS subs are at the top of the food chane and i will be happy once i get this handeled. I went SVS because of this forum and others. you guys know what your talking about and i'm lissnen

  25. #25

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    So is SVS sending another one?????? You say it's defective and that is the simple solution.
    PS3 and HD Front Projection, life is good. Too bad Blu-Ray and the PS3 are already obsolete.....

  26. #26

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    Ya, OK!!!!
    PS3 and HD Front Projection, life is good. Too bad Blu-Ray and the PS3 are already obsolete.....

  27. #27

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    where working on IT. THANKS

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