Question about Alpine IVA-D300 6.5" LCD Screen DVD Player

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No sound from Subwoofers

I have a iva-d300. i also have aftermarket subwoofers and mids. i have Rockford Fosgate subs and amps and MB quart mids so they r not junk. both on Rockford amplifiers. i have all of the wiring correct and my mids work fine and i have power to my sub amp. i went thru the manual and im positive i have done everything it says to do.but i have no sound at all coming from my subs. im not sure if there is a hidden setting for the subwoofers in the head unit or not???

Posted by liltownryder on


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Did you check the gain level on the amp? Sometimes a bad or loose ground can cause this also. Was it working previosly and it stopped or did it never work at all. Let me know. Hope this helps.

Posted on Sep 14, 2007


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You may be surprised to learn that even though there is a negative and positive on the sub it usually dont matter all that much because that amp allows you to switch the polarity of its outputs to allow your mids to sound better... anyways on to your question To wire a sub it depends on how many you have, if they are dual or single voice coils, what impediance your amp is stable at. Tell me what type of amp you are hooking this subwoofer up to and how many are being connected. And ill try and give you the best way to connect the sub(s) to your amp.

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