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Deck,amp and sub

Ok my subs kept on pulsing and my friend says that it could be the deck that is messing it up or is it the amp thats making the subs pulse. Also the face of my deck is blank but it still works

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  • 113 Answers

If it still plays then it could be low current.check for proper wire guage

Posted on Sep 09, 2008

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1 Answer

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well sounds like you crossed a wire somewhere. I would go through all the wires and check all the fuses on the amp and car.

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Not knowing what Sony unit you had, I can't be sure, but it is likely your Sony had higher voltage preamp outputs than the Kenwood, as the KDC315 has 2V outputs.

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Could try switching right and left subs. If the problem moves to the other side pull the wiring and redo.
Then if the wiring is ok check the sub.

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Subs make one very loud bang when car starts i have a kenwood kdc 528 deck and 2 pioneer 12in subs an amp


Hook it up properly to the deck remote on wire ,(Dude) End stay off the (Drugs)

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Ok i got a mtx 12' 500 sub matched to a alpine mrd-m500 mono amp. The deck powers the 4 speakers, as i turn the volume up on my deck (alpine cde 100) the sub/amp cuts out at around volume 20-22 and E-3...


Sorry,after rereading your problem,I gave a wrong answer.Do you have the deck sub RCA pre-amps connected to the amp,then the wires from the amp to the sub?If you do,you need to check what the sub and amp are rated as such as,peak or rms.They are 2 completely different meanings.Greg

Feb 11, 2011 | Alpine MRD-M500 Car Audio Amplifier

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My subs are moving and pulsing with the volume off


I am currently having this problem. Im no professional but i have done installs on my own personal cars and my friends cars (saab 95, Mitsubishi 3000gt, 1996 mustang, 1999 mustang, ect..) I have replaced every but my amp, so today i tried using a friend of mine amp and that solved the problem. I have a TON of research on this and everything i've read says its more than likely a bad relay on the amp and unless you have FLAWLESS soldering skills not to mess with it. idk if this helps much but it was the solution to my problem!

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Sony is not a bad brand if you use it correctly... This is what is happening my friend. You are what is called "clipping" your amplifier. What you need to do is make sure you are running your subs at the correct impedance or also known as resistance. Then make sure you are running them at the correct frequency, there is a turn tab on the amp to match the sub to the amp. Then never never turn the gain all the way up. This over works the amp and will wear it out much faster. This also does not actually give more power to the subs it just gains the power sooner then later. Never turn the gain more then half way up.. Hope this can step you in the correct direction my friend.

By the way plaztiksr4me kenwood is junk too :O

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I got the same problem since thair is no sub out for this deck


Hello livinglifeas,

You can connect the regular preamp outputs to a sub amp. Dedicated sub outputs will normally have a built-in crossover whereas the regular front/rear preamp outs will be full-range. Just make sure that the amp you use for your sub(s) has a "low pass" filter.

Hope this helps.


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I just got the Kenwood Sub KSC WA100 from my cousin with no electric wires or nothing so pretty much what all do i need and where can i find it i will be putting it in a 07 nissan sentra 2.0


Subs are subs, they come with no wiring. You need an amp and all necessary wiring to get it bumping. What type of deck do you have? Where will the sub be placed? In the trunk? Amp install is easy. Also suggest purchasing one of those amp kits for $20-$30, makes it a bit easier.

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Blown solobaric?


how did he messed up? anyways, if u push the cone of the sub down and u hear a sound like "TUN!" its most likely ur sub is irremediably damaged. The cone needs to come up perfectly as a good sub would do. I need to know exactly what ur friend did b.c it is quite weird to mess a good sub by slightly switching cables

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