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Amp? I have a 4 channel alpine amp running a pair of component speakers (6 1/2 and 1") and a pair of 4x6 plate speakers. A separate amp runs the subs. At anything higher than low volume the highs cut out every few seconds and then come back on. It happens when playing the radio, cds, or thumb drives in the USB. It worked fine for a couple mounths. Now I have problems. Any help would be appreciated. Thanks

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Re: amp?

Make certain that each ouput channel from the unit is driving no more that 4 ohms each. If you have more than one speaker attached to an output then be sure they are wired in series NOT parallel. Two 4 ohm speakers in series is an 8 ohm load and the same two speakers in parallel is a 2 ohm load. If the speakers are dual voice coils then you must treat each voice coil as if it were another speaker when it comes to wiring.

Posted on Aug 17, 2007

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I have an alpine cda9831 unit with 10" subs. I have an alpine v power m500 independently running them. The subs will randomly cut off and on and the wires to the head unit have been checked for loose...

so you have already ensured that there are no crossed/loose wire strands.

you are running 2 subs off a single alpine mono amp.

if subs are 4 ohms apiece, you should be fine. if you have 2 ohm subs, or you have dual voice coil subs and you are running all the voice coils parallel, then there is your problem. you can have a maximum of a 2 ohm (2x4 ohm speakers= 2 ohms.) load with that amp.

ensure that the subs are 4 ohms apiece, and that you are not using dual voice coils. if the subs have 2 inputs (dual voice coils) then only use 1 input apiece.

if this is already taken care of, then your amp is defective.

Nov 06, 2010 | Car Audio Receivers

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depending on how many channels the amp is, you may not be able to hook everything up to it.

usually you have a separate amp for subs. 4 channel amp for the speakers in the car, and a mono amp for the subs.

To hook them all up to the same amp you would need an amp with 5 channels. It wouldn't work out right.

If you have a mono amp its only for subs.

If you have a 2 channel you can either hook it up to the rear speakers or bridge them to mono to run the subs.

you need a channel per speaker basically.

Dec 15, 2009 | Pioneer DEH-P2000 CD Player

3 Answers

I need help installing a 4 Channel Power Acoustik Amplifier to Two Pioneer Subwoofers. I hooked up the power wire to the positive battery terminal in the engine compartment. I then cut the power wire and...

You are doing right on what you described. I really like to work with a clearly described what involved in an issue.

Now we have to use a Voltmeter to check if there is power to the amplifier. If there is power to the amplifier terminal, then the problem is at the amplifier, not the connection. Let check it out:

1- Turn on your Kenwood radio, make sure to hear sound from your regular speakers.
2- Turn remote control knob to the mid level between min and max.
3- Measure the blue wire where you spliced to ground to see if you have 12V, if it is not then the problem is right there.
4- Measure the Red wire power from the Amplifier to ground ( the bolt that you connect the negative power to see if there is 12V, if not trace back to the Fuse that you inserted between the positive terminal of the battery and the wire going through the firewall to correct it.
5- If you have 12V at step 3 and 4, then you have a defect unit, return it to the manufacturer for a replacement.

Sep 06, 2009 | Car Audio Receivers

1 Answer

Hey is ther any why i can run six Speakers off this head unit + an amp and sub system?

The head unit will drive four speakers, 2 front ,2 rear.
Best way to add two more speakers and a sub is to get a 4 channel amp. Hook it up to the RCA jacks from your head unit. Bridge two channels of the amp to drive your sub, and use the other two channels of the amp to drive the extra two speakers. Just make sure whatever amp you get it's bridgeable.

Aug 05, 2009 | Sony CDX-M800 CD Player

1 Answer

I have a jvc kds580 and i wanna run a passive Bazooka EL and 4 other speakers. Can i drive the sub with the 2 RCA OUTS on the back of the unit? If not, how do i drive the sub?

RCA Outs are very low power signal connectors. They would have a hard time running a pair of headphones.

What you need is a Power Amp that the RCA's plug into and your subs Connect to.
You need an Amp (Amplifier) that powers a similar number of Watts to what your Subs Capacity is. (ie; your subs have a ratting of 100W (Watts), then you need an amplifier with 100W per channel; that's a 200W amp for a two way (Speaker) amp, or a 400W rating for an amp with 4 channels (4 Speaker connectors)
You can run a lower power amp on your subs, and use ony a portion of your speakers capacity; but if you get an amp that supplies more wattage than your speakers capacity, then you'll blow your speakers, their performance will deteriorate slowly. eventually they will not be able to generate a clear reproduction, Speakers are irrepairable.

Sorry for the long explanation.
This is something you wan't to do right, the first time.


Jun 21, 2009 | JVC KD-S580 CD Player

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Some decks only give one pair of pre outs. Most 4 channel amps can use just a 2 channel input and feed the other 2 channels by the flip of an input selection switch. I recomend a 4 channel amp if you want to power front and rear speakers and be able to set the gains to blend properly, or you can run all 4 speakers at a 2 ohm stereo on 2 channels and run a sub on the remaining r channels. It just depends on how you want the setup to be nd to how much control you want. Let me know.

Larry T
Winona Lake, IN

Jan 22, 2009 | Kenwood KDC-215S CD Player

2 Answers

Alpine cde 9852

In actuality the resistance of the speaker depends on the frequency the speaker is playing. For example, a speaker may have a 3 ohm resistance at 80 Hz and a 9 ohm resistance at 300 Hz. If you were to make a plot of resistance versus frequency you would get what is called the impedance curve of the speaker. Also, speakers act in some ways as inductors and capacitors so a true model of a speaker must include those components as well. How does this affect the sound you ask? Well if you have an amp that has very weak current capability it may work fine into perfect 4 ohm loads but when you connect our real speaker which has an impedance dip at 80 Hz the amp may have difficulty and smear sounds that have 80 Hz components. These are minor but audible effects. This is why it is good to get a 2 ohm stable amp even if you never plan on running 2 ohm loads.

Mar 03, 2008 | Alpine CDE-9852 CD Player

1 Answer

How to wire a stereo system

Connect the 2 gage to the battery thru at least s 50 amp fuse, then connect the capacitor in line before the amps. Then run the 2 gage to a connector/splitter block and run 4 gage leads to each amp. You also will need at least 4 gage ground leads from each amp to a body grounded bolt or screw. You need to run a quality set of speaker leads from the head unit to the amps. The speakers will need separate leads from the amp to each speaker.You will need to try some different combinations to get the sound and bass you want. You want to be able to fade from front to rear and control everything thru the head unit.
Use a hole saw to cut a 2 to 3 inch diameter hole in the side of the speaker box for a port to get a better punch from the sub.
Hope this helps some....

Nov 03, 2007 | Alpine CDA-7863 CD Player

1 Answer

No sound to the in car speakers from my alpine cda-9827 cd player

What kind of car did you install this in? Did it have a factory radio in it? If I had to take a guess I would think that there is a factory amp that you may have hooked the blue wire from the alpine deck to. If this is the case when you switch to CD the alpine deck turns off the power to the power antenna lead(blue wire) and thus your factory amp. If this is the case hook the factory amp turn on to the blue and white wire and you should be good to go.

Sep 02, 2007 | Alpine CDA-9827 CD Player

1 Answer


if you get a buzz or whine noise that changes on acceleration of the engine,,, for some reason your amp is picking up alternator "noise" the most common cause of this is a corroded/dirty/non bare metal/poor ground connection to the cars chassis form your amp.. recheck your connections and make sure! Another trick is to run the rca cables on the opposite side of the car as the power wire. Also if your rcas have a small wire in the center DO NOT USE IT FOR A REMOTE WIRE!!! it is meant to be grounded on both ends to eliminate noise. Also p.a.c.(pacific accessory corporation) makes a noise filter you can put inline betwen your rca cables and the amp. I have had some sccess with that..

Aug 22, 2007 | iLO XM-MP3-CD Car Stereo

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