Question about Sony XS-L120B5D Dual 12" Ported Enclosure

2 Answers

I have the Sony XS-L120B5D subwoofer with enclosure: sensitivity-89db RMS-600 watts Peak-2000 watts impedance-4 ohm frequency rangh-20hz-2000hz its hooked up to an Arc Audio ks 300.2 amp: class-g/h power output @ 4ohm- 180x2watts power output @ 2ohm- 350watts power output @ 4 ohm bridged-700 watts (currently hooked up as) frequency range-7hz-68KHz crossover range-55hz-5.5KHz bass boost-0-15 db @ 45Hz input sensitivity (RCA)-.25v-4v the problem is that the sound coming from the subs isn't "low and deep". its more noise than bass. the gain is not set too high. the bass coming out of it is not clean. please help

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  • cheeseballch Jun 24, 2009

    yes, it's set to low and it's at 55Hz, the lowest the amp goes down to. here is the manual to the amp:

  • cheeseballch Jun 25, 2009
  • cheeseballch Jun 25, 2009

    Here's the set-up

  • cheeseballch Jun 25, 2009

    amp power

  • cheeseballch Jun 25, 2009

    gain-min...Freq.-55Hz on Low...Bass Boost-15dB (adjusting that doesnt help much)...annel switch is at L+R Mono

  • cheeseballch Jun 25, 2009

    i'm pretty sure it's 2 2Ohm subs. i had troubles with a previous amp and i took it in to an expert who told me that the amp i was using before was way too weak for the subs; only putting out like 170 watts RMS. he then refered me to the amp i have now. i know its not the amp cuz the guy knew alot about this stuff. i have the amp running off 8 AWG rockford wire, would it help to increase to 4 AWG? another thought is the size of my car (1997 Saturn SL2 4 dr) it sounds great outside my car but not inside. when i stand next to my car the bass is clear and deep but inside its loud and "messy". in that case, would it help to take out one sub and just have a single 12'' in a smaller enclosure?

  • cheeseballch Jun 27, 2009

    (((sounds like you are out of phase, just reverse the wires for ONE of the
    woofers and that should do the trick. just try it, it will amaze you!))))

    what do you mean by reversing the wires?

  • cheeseballch Jun 27, 2009

    the subs were pre-wired in the enclosure, it wont blow my subs will it?

  • cheeseballch Jul 02, 2009

    i was wondering, if i dynamat the entire trunk, will that make the bass deeper, or instead, i was thinking of replacing the subs with 2 12'' kenwoods


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Sounds like you are out of phase, just reverse the wires for ONE of the woofers and that should do the trick. just try it, it will amaze you!

Posted on Jun 26, 2009

  • jmprestonii Jun 28, 2009

    Reverse the polarity on ONE woofer


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Do you have the crossover switched to "low pass"? and the frequency control below 80hz? Do you have the manual? If you need more help, post a comment and I can walk you thru it. Hope this helps

Posted on Jun 24, 2009

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  • Frank Fulton
    Frank Fulton Jun 25, 2009

    I looked at the manual, If youve got the amp set to Bridged/low pass/55hz and you are still hearing vocals, your x-over has a problem. If it just sounds lame, that's different. Check the wiring on the subs. Make sure you've got it + to + and - to - from driver to driver then to the amp. From the jpeg, it looks as though you've got L+ and R- for output, that's correct. If all that checks out correct. It's an amp problem. Was it ever working correctly or is this a new install?

  • Frank Fulton
    Frank Fulton Jun 25, 2009

    Also, the box was purchased like this? 2 8ohm drivers wired parallel, or is it 2 4ohm drivers wired parallel. If your not sure, if you've got a meter, check the impedance at the terminal on the box.

  • Frank Fulton
    Frank Fulton Jun 25, 2009

    Now, I've got a little better perspective on what your getting at. It's not really a electronics problem, but a sound quality problem. O.k.

    Well the first obstacle you need to overcome is the fact that your subs are firing thru the trunk to the interior. You need to pull everything out of the trunk and Dynamat it. That's gonna take care of alot of the vibration. Underside of the trunk lid,license plate, side walls and floor. You'll probably spend a 100 or so on dynamat and 50 or so on a good heat gun. Next, if you can, can you get rid of the sony subs & enclosure? Japanese subs can't compare to any U.S. products. Depending on what you listen to is going to decide the next step. Have you replaced the interior speakers with components and an amp yet? Look at Hertz, they are way more efficient and clean than anything I've listened to in a while and they won't break the bank. You need to upgrade your power from 8ga to 4 ga. Preferrably Streetwires, as you replace the interior speakers Dynamat the doors and floor. 400-500. Just changing subs around will never satisfy anyone who is interested in "Sound Quality" Period... My last show vehicle had over 100k in electronics in it and 68 drivers of various sizes and 7,500w at .008thd "clean" That one did the trick. Hope you have a good job or like to work alot of hours... that's what it takes.

  • Frank Fulton
    Frank Fulton Jun 28, 2009

    If it's wired out of phase, it would sound horrible; obviously horrible! and no, it will not blow a fuse. It will either sound incredibly worse, or incredibly better. Check all of the wiring from the first sub to the second sub, then to the amp. It should be + to + from speaker to speaker and - to - at the speaker. Then one + and one - to the box terminal, then to the amp. And at the amp you should be using Left + and right -


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