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How to properly set a sub with a seperate amp?

Discussion in 'Archived Threads 2001-2004' started by Phil_Lunar, Aug 20, 2002.

  1. Phil_Lunar

    Phil_Lunar Stunt Coordinator

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    I made a lot of mistake on my first attempt on the subject line so I can understand why I haven't got any answers so far, so here is is again:


    My system consist of a Kenwood VR-410 system with a 5 speakers suround kit from kenwood.

    with that kenwood kit come a 8' passive subwoofer.

    so I've decided to use my old Pionner stereo amp 100WX2(200W thru mono?) to power the sub

    Everything is fine now and I am quite pleased with my setup

    but now I am wondering if I plugged everything the right way for the sub and amp??

    here is how it is setup :

    I got a RCA cable going out of my Kenwood receiver through the sub preout plugged into the stereo Pionner receiver using a splitter to go on left and right input of the line in(CD actually)

    now I got a pair of 12g speaker cable running from both left and right channel into the left and right input of the passive sub(got input for left and right speakers pair so I thoughtit might be better)

    Now, I put the sound level of the stereo amp at about 50% and I left the sub Out level of my kenwood receiver to 0db

    it's not bad I got pretty solid low deep bass, but could it be better?

    I ma not an expert in amp so I suppose that if I plug it in mono(not splitting my RCA cable and only running one 12g speaker wire to the left or right input of the sub) I will not used the 200W that my stereo amp can give me. is this right or do the 200W can got thru only a mono signal?

    also, should I crank up the sound level of my sub to 100% and lower my receiver setting to someting like -5 to -10db?(like they recomend on the SVS website, and I know I don't have a SVS CS sub so It might be irelevant) or should I leave it like it is now(50% and 0 db?

    to much possible tweeking for my poor soul! :) please help me!
     
  2. Juan Castillo

    Juan Castillo Second Unit

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    Do you know if your sub has a dual voice coil woofer, in other words, two voice coils,one input for each. If so, than your setup is like mine, where I am using a stereo reciever to power a passive sub. But since I know for sure that mine is dual voice coil, I need both left and right channels live, so that I am taking advantage of powering both voice coils. If not, than your sub may combine the left and right channels to one mono feed to the woofer. If this is the case. Just plug the single sub cable from your kenwood, to either the red or white input on the CD input from your pioneer, and turn the balance to the corresponding side, and then run one line to the same corresponding side input on the sub. I don't know if your Pioneer will pass the signal, if both left and right are not hooked up at the same time tho. Just try it and see if there is a difference in sound.
     
  3. Wayne A. Pflughaupt

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    Phil,
    Have no fear, you did everything right.
    No disrespect to Juan, my bud and fellow Texan... [​IMG]
    ...but if the sub “combined the left and right channels to one mono feed to the woofer,” this would mean there is an internal amp (no speaker engineer or designer in his right mind would combine two speaker leads to a single voice coiled driver!). It’s already been established that the sub is passive (non-powered).
    Still, experimentation never hurts, so you can try Juan’s alternate connection scheme and see if you like it better.
    Regards,
    Wayne A. Pflughaupt
     
  4. Juan Castillo

    Juan Castillo Second Unit

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    Ah Wayne... I know you would not disrespect a fellow Texan.. especially one who is still a newbie.

    Question tho. Can we also assume that Phils sub has a dual voice coil woofer? Why else would they have given him left and right inputs? right?


    Word to the wise Phil.. listen to what Wayne has to say whenever he offers his opinion or knowledge. He's one smart cookie.
     
  5. Wayne A. Pflughaupt

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  6. Phil_Lunar

    Phil_Lunar Stunt Coordinator

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  7. Wayne A. Pflughaupt

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    I think the way you’re doing it is probably best – receiver up high, sub output low.

    Regards,
    Wayne A. Pflughaupt
     

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