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I have a 4 channel amp run to two twelves. waited a couple of days to bridge the speaker wire. It hit twice as hard as expected but after a few hours it went back to the power of strait wiring with nothing traumatic happening. At first i thought maybe the speaker wire came undone but i checked and everything is still hooked up and the power is running to the amp. I'm not sure what to do next. Please Help!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

The Marv
  • 72 Answers

SOURCE: Please help

Check to make sure you speaker has not shorted. Try a different speaker. If this is not the case you could have an internal shorted transistor inside of the amplifier. or in some cases both. If it is in the amp and you are comfortable working on the amp remove the cover and along the side connected to the heatsink. You will find the smps and the output transistors. use an ohmeter and check across the three legs one way you sould get one reading and if you flip the leads you will get another. if you encounter no resistance, no matter which way the leads are placed. That transistor will probaly need to be replaced. But check the speaker before you do anything. and the wires going to the speakers.

Posted on Aug 03, 2006

  • 631 Answers

SOURCE: kenwood ps 150

With your multimeter set to DC volts and the black meter lead on the ground terminal of the amp, touch the red lead alternately to the B+ and remote terminals as the amp shuts down. If the voltage drops below ~11 volts, you need to check the wiring feeding whichever line is dropping too low.


If the voltage is not dropping too low, you may have a defective speaker or a short in the wiring. Check the resistance of each individual voice coil to make sure all are near the rated impedance.

Posted on Dec 01, 2007

jdrrwoods
  • 82 Answers

SOURCE: wiring my subs to my amp

bridge it and rear channel if you need to know how to bridge let me know

Posted on Feb 09, 2008

  • 21 Answers

SOURCE: Left speaker channel not working

you may have to send it in or back to the company... being that its one side it could be a blown amp or perhaps a bad speaker on that side ..

hooking up two 6x9s and a sub in bridge mode you could have a wiring problem when i bridge an amp i go from positive of one side and negitive on the other to the same positive and negitive on the sub or box



+--------------------\
` bridge =========== > SUB
- --------------------/

hope this helps

Posted on Dec 26, 2008

blueextc3221
  • 15935 Answers

SOURCE: need specs and wiring options

Eclipse 36401 eclipse%20pa36401.jpg

  • 105W x 4 Channel Max. Power Output at 2o.gif Stereo
  • 60W x 4 Channel 0.1% THD at 2o.gif Stereo @13.8V (RMS Continuous Power)
  • 40W x 4 Channel 0.1% THD at 4o.gif Stereo @13.8V (RMS Continuous Power)
  • ChannelFlex Crossover
  • Adjustable High-Pass Frequency (50-200Hz, L/R Independent)
  • Low-Pass Frequency (120Hz)
  • Adjustable Bass-Boost Level (45Hz, 0-9dB, F/R Separate)
  • High-Current, High-Speed Output Devices
  • High-Efficiency, High-Energy MOS-FET Power Supply
  • Audiophile Grade Component Selection
  • Intelligent 7-Way Discrete Protection Circuitry
  • Noise Reduction with Low Distortion & Ultra-Low Negative Feedback
  • High-Level Input - Add on Capability
  • Epoxy Composite PCB
  • 2o.gif Stable Design
Each 6 1/2" speaker will see 40 Watts
Each 6"x9" will see 521/2 Watts

Yes your solution is correct. Front wired in stereo, bridge rear.

Posted on Dec 29, 2008

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1 Answer

Do you bridge a 850.4 four channel amp when it is 2 ohm stable and ur subs are wired up as series/ parallel and there 2 ohm dual voice coil speakers


If you wire 2 ohm dvc speaker parallel that would give you a 1 ohm load. If your amp is only 2 ohm stable that would not work. You would have to wire the speaker in series giving you a 4 ohm load. Then you can bridge the 4 channels into 2 with each speaker running at 4 ohms.
If you want to run a 2 ohm load use all 4 channels on amp and speakers. No need to bridge.
For 2 ohm DVC:
Parallel = connect both + and - together. = 1 ohm
Series = connect + from 1 channel to - from the other channel. = 4 ohm.

Jul 06, 2014 | Car Audio & Video

2 Answers

How to wire a crossfire vr602 2 channel amp at 4ohm and 2ohm


I would be more worried about the amp than the speakers, those subs should handle the watts with no problem. The problem will be in the amps ability to remain working with a bridged 2 ohm load. It may not even stay on without going into protect mode with a 2 ohm load. If it does stay on then it may get really hot and shut off from the heat off of the Mosfett Transistors, or it could burn the Mosfetts from driving them too hard. Basically it's your choice, run your amp hard and gain more volume or run it with slightly less sound and have a cleaner sounding more stable amp that will stay on and have less chance of being damaged. If it's not loud enough the best thing to do is buy a different amp that better suits your needs and fits the application. In your case a 2 ohm stable Mono amp is going to be your best bet or a 4 channel amp bridged into 2 channels and run with 4 ohms on each channel. Or another exact matching amp like your 2 channel amp bridge them both and have each powering 1 of your 4 ohm subs. I used two VR mono amps to power my two 12" 4 ohm subs for a few years

Apr 03, 2013 | Crossfire VR602 Car Audio Amplifier

1 Answer

I just bought 2 plsq10d/ 10" square Pyle subwoofers. I've got some questions. What would be better, one amp or two? How many watts for the amp(s)? Do I need to mess with my alternator to power this system?...


Hi, tech specs say 1200 watts peak. what you want is RMS value and quick guide I use to comvert watts peak to Rms is divide by 3 (approx=400Wrms) Ok to drive a little harder - use 500Watt RMS amps per speaker. decision to use 1 or 2 amps depends on amp capability -use 2 x 500wrms 2 channel amps(1 per speaker bridged mode) or 1 x 1000wrms 4 channel amp (bridge 2 channels for each speaker). Whether you need to do anything about your charging system will depend largely on the capability of your alternator and the various vehicle loads that need to be supplied on a day to day basis ( use winter for worst case scenarios) as this system could be reasonably expected to consume 60 amps on large bass notes (dead giveaway is to add the fuse ratings on nominated amps). there is vast amounts of knowledge for this subject and what has been touched on here is just that

Aug 10, 2010 | Car Audio & Video

1 Answer

Can you bridge the vega 124 or just use 1 channel on a punch 400x4


Here are the important concerns:
The power rating of the speaker(400W) should be 25% HIGHER than the maximum output of the amplifier BRIDGED. (Amp bridged output 200W - OK!)
The amplifier will get twice as warm running the speaker when loud.
The impedance of the speaker can be no less than 4 ohms when the amplifier is bridged. (Yes, this speaker is 4 ohms - OK!)
Your punch amp is capable of running TWO Cerwin Vega 124s, bridged.

Apr 02, 2010 | Cerwin Vega 124 Car Subwoofer

2 Answers

Two terminals? bridging theory?


Hello again jm129852,

Having two power and ground terminals allows you to run two smaller wires instead of one big one. It's a convenience. No, you do not have to use them both. They are connected together inside. Yes, you should still use a single fused battery lead. Connect the big wire and fuse holder to the battery and to a distribution block and run the smaller wires from the output side of the distribution block.

When you connect the outputs of a two channel amp to two separate speakers, each speaker gets the power produced by it's channel only. If you are using only one speaker, and the amp is rated to operate bridged, then the speaker will receive the power from both channels, typically twice as much. You do need to be careful when using bridged mode because many amps will only operate safely at a higher impedance when bridged. For example, when operated with both channels connected to separate speakers (not bridged), it may be stable to 2 ohms. But when you connect both channels together (bridged), it is only stable to 4 ohms. Usually, the specifications will tell you the lowest impedance at which the amp should be operated. The specifications for the current RF Punch 500.2 are like this: 125 watts X 2 at 4 ohms; 250 watts X 2 at 2 ohms; 500 watts X 1 bridged at 4 ohms (4 ohm stable in bridged mode). You would NOT want to connect two 4 ohm subs in parallel to this amp in bridged mode. It would result in a final 2 ohm load and the amp would overheat and fail. One 4 ohm sub would be OK, and it would receive the full 500 watts as stated in the specifications. You could connect four 4 ohm subs, two each in parallel to each channel, and the 2 ohm loads on each channel would be OK. Or you could series two of them together for an 8 ohm load, do the same with the other two, and then parallel the two 8 ohm loads for a final impedance of 4 ohms and connect them into the bridged terminals. With DVC subs the connection possibilities get more complex. There are many good impedance calculators online that can help you determine the best wiring solution for various amp/sub combinations. I like the one above at the12v.com web site. Rockford-Fosgate also has one which allow you to select the a number of subs (up to 4), their voice coil configuration (single or dual), and the voice coil impedance. The RF calculator then shows you what configurations are available and what your final load impedance will be.

Hope this helps.

Apr 28, 2009 | Rockford Fosgate Punch 800a2 Car Audio...

1 Answer

Subwoofers


This will depend on the amplifiers capabilities.

I will give 2 different scenarios.

#1 Stereo configuration

If the amplifier supports an RMS power output close to the RMS input power of the subwoofers then run the amplifier in stereo mode. For example 150 watts RMS X 4 channels driven at 20-20khz. (If you can provide a model # for the subs and the amp your looking at I can help you further with this decision.

Wiring for this is easy and simply involves matching the connectors for 2 of the channels (Front or Rear) to each of the subwoofers.

#2 Mono Bridged mode.

If the amplifier is lower power but mono bridgable you can bridge two Pairs of channels and power each of the subwoofers this way.

Generally speaking a 2 channel bridgable amplifier will be able to at least combine the wattage of each channel into a single monural channel and in many cases its actually higher.

So you would bridge the front 2 channels into a single bridged mode for one subwoofer. and then you could bridge the read 2 channels into another bridged mono channel for your other sub woofer.

For example if you had bridgable amplifier thats 50 watts RMS X 4 you coudl very likely (Generalization based on quality of amplifier) send 150 watts RMS to each subwoofer.

Again I would need to know what amp you're refering to to provide specific wiring instructions. Many Bridging amplifiers either have a single switch that will send them to bridged mode or you would use the positive + terminal from one channel and the negative - terminal from the other channel or a combination of both.

Sep 17, 2008 | Kenwood 12" 4-Ohm Single-Voice-Coil...

1 Answer

Sony xplod xm-1652z amp


You probably have the output bridged at 2 ohms. This amp is not a 2 ohm bridged stable amp. It is 2 ohm stable only in stereo. That means each channel can be 2 ohms, buts not bridged at 2 ohms.

If you have two 4 ohm speakers that are wired in parallel and then you bridge them, you have a 2 ohm load.

They only safe way to use two 4 ohm speakers is to run one speaker to each channel and then you have a stereo 4 ohm load.

When you use a 2 ohm load you get twice the current draw thru the amplifier as you would with a 4 ohm load. That means that the fuse you are using, the rating the amplifier is designed for, will blow any time you have a big bass hit.

If you are not using a 2 ohm bridged load, and you are using a 4 ohm bridged or something the amplifier is rated for, and you still have this problem, you may have a bad speaker. Even a speaker that will play can sometimes be on the brink of shorting out and causing the amplifier to draw lots more current than it is rated for.

If this is the case, you should go and get your speakers checked and see if they are still measuring at 4 ohms or at least close to it. Most speakers will measure a little lower than what the are rated. It is not unusual for a 4 ohm speaker to measure at 3.5 ohms, but if it is less than that, you problem is the speaker. Even if the speaker still plays.

I hope this was helpful for you, if you require any further help just ask.

If you did find that this was helpful in solving your problem, I would really appreciate a good rating.
Thanks and have a great day,
Dave

Jun 19, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

2 Answers

Bridge subwoofers


Without looking up the individual specs of your speaker and amp, I'll offer a few basics when it comes to bridging an amp.
Most important...find out what impedance (ohm) that your amp can handle bridged!! If you go below this rating, you will run the risk and most likely eventually overheat and short circuit the amp. You must also know the impedance of your sub (which can come in a variety) to be able to match them. Depending on this impedance match-up, it may be less beneficial to bridge the speaker to this amp. For example if there is an impedance mismatch you'll either get less power from the amp or short circuit the amp. If you know these I can help you come up with the best solution.
If you know bridging is the best option, then you'll have to know which terminals on the amp to use in order to bridge. This is how it normally works. On a 2 channel amp...you would normally take the positive from one channel to the positive on the speaker, and the negative from the OTHER channel to the negative on the speaker...and this is how you bridge the amp. The other two channels would remain UNCONNECTED. BUT!!! you have to make sure you use the correct 2 channels...it varies from manufacturer. But take heed not overload the amp...and not to overpower the sub. There are a few different ways that you can configure the subs if you find it beneficial to bridge your amp, these would take long to explain and would depend on the impedance of your subs and specs of your amp...these wiring configurations is how you match the impedance of the speakers input to the amps output (and is very important to do correctly) Look up "parallel and series" wiring configurations. Let me know if this helps, or if you need further help. Find out the impedance of your subs and the specs of your amp and i'll be able to assist you more. Hope this helps.

Mar 27, 2008 | Car Audio & Video

1 Answer

ONE CHANNEL NOT WORKING


Please don't take offense, but some tips on submitting problems on Fixya:
  • Resist the urge to use all capital letters. Reserve them for frustrating yells :).
  • Use a period or two. It's very hard to read without them.
The easier to read, the better responses you'll get!
Anyway, back to the issue at hand.....

Definitely get a handle on the gain adjustment. Both channels should start with a gain at the 50% point. Also, you can try bridging the amp ("+" speaker outputs tied together, "-" speaker outputs tied together) and run the full 800W into the single 10" sub, but that is going to depend on what your sub is rated to handle.

The only other thing I can recommend is call around to a couple stereo shops and see if anyone can test the amp for output power. That'll verify whether there's really a problem on the one channel.

Mar 14, 2008 | Rockford Fosgate Punch 801S Car Audio...

1 Answer

My Kenwood 800watt amplifier


Sounds like you have overloaded your amp. When you bridge you MUST make sure that you still have the proper speaker load. One 4 ohm speaker on one channel is fine, but when you bridge that same 4 ohm speaker, it gives you a 2 ohm load on each of the two channels that are now bridged. If you made the mistake of wiring two 4 ohm speakers in parallel (plus to plus and minus to minus) then when you bridge you will be driving a one ohm load on each channel. This is very close to a dead short. Stop using your amp at once until you get your speaker load correct. This will damage your amp and it will cause you to have to go to a repair shop to fix it. DO NOT RUN YOUR AMP ANYMORE UNTIL YOU FIX THIS. Good luck.

Jan 22, 2007 | Kenwood KAC-9152D Car Audio Amplifier

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