I have an 8" sub woofer hooked up to a small amp. The amp powers on but the sub will not make any sound. The terminals for the sub wires that go into the amp and to the sub have not changed and are in the right location. The remote wire (spliced into the remote wire from the head unit)has also not been changed and and sub woofer feature on my head unit is on. The funny thing is that it used to work just fine. But ever since I changed the battery terminal to a gold plated one with an axillary hook up for the amp power wire, the sub has not worked. Everything is tightly connected. What could be the problem?
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the best way? hmm. i would start off with some wire. Keep in mind that you will need to separate the positive (usually red or has a stripe or marking on it) from the negative (Black usually is the common color for this wire) and hook the up according to your amps positive and negative hook ups / terminals following your sub-woofers terminals. then depending on your sub woofers Voice coils (Duel or single voice coils) yours are duel or quad coils but i\'m sure they are duel (2 of each positive and negative equaling a total of 4 posts on each sub-woofer). figure out your amps ohm load handling and does your amp run hot (1,2 or 4 ohm stable some are even less like 0.5 or lower) i would run at a 1 or 2 ohm load as that is usually standard on 1 channel amps. make sure to check your wiring and if your not sure about ohm loads just Google wiring for sub-woofer ohm loads such as 0.5 ohm, 1 ohm, 2 ohm or 4 ohm loads. also make sure your box is not sealed do to the fact they are siht and cant produce sound like a vented / ported enclosure keep the size as big as you can fit in your car or truck the bigger the better. i had one 8\'\' sony sub pounding like a 15\'\' sub real loud . Also MDF particle board is garbage it causes port noise and absorbs water
If you are getting power to the amp, try this....Find a small speaker, unhook your sub and wire speaker to amp. Turn on your system at a low volume....If the other speaker is playing through amp, then your sub is shot.....If the small speaker doesnt work, then its either your channel is gone on the amp or the rcas have quit off off your head unit.
i am having the same problem with mine was told that the amp is not pushen to the sub and to test it with another speaker if it does the same thing with the other speaker then it is the amp if it dont and the second speaker works then the sub is shorten out the amp so i wil have to replace the sub ...eather way if you bought this new they are gonna charge me 70 dollars to fix it they being alpine. I rather pay 70 then another 400 dollars good luck to you and wish me luck gonna hook it up to another speaker tonight
You can hook it up a couple of ways.
Depending on how many subs you have and what ohms they are running at here is the chart you need. If your going to run one sub off it the last option is the way to go. Your going to need to find out the power of your subs or else the power could be off and you could blow the sub. If the rms power is higher than 130watts per coil you will be fine. If so there are four channels on the amp and two should show a line going to each other that says bridge. Hook up the positives and the negative of the subs as shown on the amp that will get your max power. If your sub is running at 4 ohm. Let me know, if not thats how you would do it.
Also for the power and remote wires. Hook up a power wire (16 gauge would be plenty fine) from the battery to the + terminal of the amp. Then take an equal or bigger sized wire from the - side of the amp and secure it to any medal part of the body of the car. If there is paint on it get if off. (not on the outside of your car or where any water would be.) Then run a remote wire from your stereo (most the times it is blue and white) to the remote terminal of the amp. This tell the amp when to turn on and off. Your amp will not turn on with out all of these wires. Good luck to you and let me know how it works out.
It is possible if the model amp you have is bridgable to 1 channel. Usually when you bridge an amp you will need to hook one wire to the positive side of one channel and the negative side to the other. You will need to consult you user manual for the amp or get the manual from the sony website for instructions on how to bridge the amp or if the amp is even bridgable.
You do not say what subs you are connecting or what wiring configuration you are using. But there should be no problem if the amp is powering up normally. I'd check the gain and crossover settings to make sure they match the subs.
Having 2 +'s and 2 -'s is just a convenience for connecting more than one sub to the amp. If you have just one sub, connect to either of the positives and either of the negatives (they're connected internally). If you have 2 subs, you can run separate wires to each sub or you can wire the subs together and then run just one positive and negative to the amp.
You can connect them in a series/parallel configuration. Put two of them in series and then connect the last one in parallel across the two in series. This would give you an impeadance of around 2.7 ohms. Only do this if your amp is stable at 3 ohms or less. I am not familiar with the specs of your amp. If your amp is only 4 ohm stable you can not do this.
This would also give you half the power on the two subs in series as the power for the one that is parallel. The two in series would be sharing the total output signal, where-as the one in parallel would get the entire output signal from the amp.
if you were to connect a fourth sub woofer in this configuration it could give you a 4 ohm load, by adding the fourth sub in series with the single sub that is in parallel. or in other words, yu have two sets of 2 sub woofers each in series. That gives you two 8 ohm loads (two 4 ohm subs in series is 8 ohms). Then you take the two sets of subs and parallel them (two 8 ohm loads in parallel equals 4 ohms).
If i had a picture to show you it would make sense, two subs in series that are in parallel with two subs in series.
What kind of deck to you have? Sometimes there's a setting for the subwoofer output that has to be turned on. How is the deck hooked up to the amp? Be sure of the normal things:
-Make sure the sub is connected in side it's box
-Make sure the RCA cables didn't come off the deck
-Check every connection!
Let me know and be sure to leave feedback or I don't get paid.