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Posted on Aug 24, 2007
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No power output

I am having trouble getting power from my amp output terminals to my subwoofer. I am positive I have powered my amplifier correctly and inputs are correct as well. Green LED comes on, but no sound from sub. Subwoofer was tested and it is fine. I have an LOC connected to my factory wire harnesses, and RCA cables from LOC to amplifier inputs. Monster cable speaker wire from amp to sub. When I try to test the terminals of the speaker outputs on the amp with a voltmeter, it reads about .5 ohms, and zero AC volts...Help!! Thanks.

  • Anonymous Jan 15, 2008

    No sound comming from amp. Amp is on and it is pluged up right.




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  • Master 631 Answers
  • Posted on Oct 05, 2007
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Set the meter to AC volts and measure the AC voltage on the RCA cables where they plug into the amplifier. The black meter leat will go on the shield ground of the RCA cable. The red lead on the center conductor. You may have to turn the volume up to get a reading on the meter. At high volume, you should read at least one volt but the actual voltage will vary due to the audio signal. If you get no voltage on the RCAs, measure the AC voltage on the input to the LOC. Let me know what you find.

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1helpful
1answer

I have an Impulse 1252xi kicker and 2 12" kicker compvt 2 ohm shallow mount subs in custom ported box. How would I hook the subs up to keep the ohms correct and get the best bass I can get.

To properly wire your 2-ohm Kicker CompVT subs in a way that maintains a 2-ohm load for your Impulse 1252xi amplifier, you can use the following wiring configurations:
Assuming each Kicker CompVT subwoofer has a 2-ohm impedance:

Wiring Configuration 1: Series-Parallel Wiring for 2-Ohm Load

  1. Connect the positive terminal of the first subwoofer to the positive terminal of the second subwoofer.
  2. Connect the negative terminal of the first subwoofer to the negative terminal of the second subwoofer.
  3. Connect the positive terminal of one of the subs to the positive terminal on the amplifier.
  4. Connect the negative terminal of the other sub to the negative terminal on the amplifier.
This configuration results in a 2-ohm load. It combines the two 2-ohm subs in series (4 ohms) and then connects them in parallel, resulting in a final 2-ohm load.

Wiring Configuration 2: Parallel Wiring for 1-Ohm Load

  1. Connect the positive terminal of each subwoofer to the positive terminal on the amplifier.
  2. Connect the negative terminal of each subwoofer to the negative terminal on the amplifier.
This configuration results in a 1-ohm load. It directly connects each 2-ohm subwoofer in parallel.

Choosing the Best Configuration:

The Impulse 1252xi amplifier is likely designed to handle a 2-ohm load without any issues. However, it's essential to check the amplifier's specifications to ensure compatibility with a 2-ohm load.
Choosing between the two configurations depends on the capability of your amplifier. If your amplifier is stable at 1-ohm, you might opt for the second configuration to maximize power. If it's not stable at 1-ohm, go with the first configuration to maintain a 2-ohm load.
Always refer to the amplifier's manual or specifications to confirm its minimum stable impedance and adjust your wiring accordingly. Incorrect impedance matching can result in damage to your amplifier or subwoofers. If you're unsure, consult with a professional car audio installer for personalized advice.
tip

How To Bi-Amp And Bi-Wire Speakers!

What is the difference between bi-wiring and bi-amping?
Bi-wiring is using the same power source (amplifier) but separately connecting that power source to a woofer and a midrange/tweeter on a speaker.

Bi-amping is using two separate power sources (amplifiers) and connecting one amplifier to a woofer and the other amplifier to a midrange/tweeter on a speaker.

How do I bi-wire?
Your speaker must have two separate positive and negative connections (one set for the woofer and one set for the midrange/tweeter). Connect one wire between the positive terminal on the amplifier/receiver the positive terminal on the speaker. Connect the other wire from the negative terminal on the amplifier/receiver to the corresponding negative terminal on the speaker. Remove the jumper straps connecting the two sets of speaker inputs. Repeat this process for the second set of terminals on the speaker, connecting them to the same positive and negative terminals on the receiver/amplifier. Repeat the steps for each speaker you wish to Bi-Wire, connecting them to the appropriate terminals on your receiver/amplifier.

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How do I bi-amp?
Bi-amping is similar to bi-wiring, but involves separate amplifiers: one for the woofer and one for the midrange/tweeter. Passive bi-amping involves a direct hookup between each amplifier and the speaker terminals. True bi-amping involves hooking the preamp to an electronic crossover that replaces the passive crossover network in the speaker. The active crossover then connects to multiple power amplifiers.

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0helpful
1answer

4-8 Ohm Output Overpowered?

You weren't by chance connecting a powered subwoofer to the standard speaker channels? Most powered subs require a dedicated output from the amp, otherwise you would be amplifying the signal twice over!
0helpful
1answer

When I hook up the speakers in the back to the left and right side for the in and out, do I connect the front or rear speakers. do the speakers connect to the subwoofer first then to my receiver or the...

I was trying to find an owner's manual or picture of the rear panel of the sub, but had no luck. The subwoofer is a powered type - or "active" speaker. This means it has a built in amplifier. These active subs usually provide for one or both "low level" and "high level" inputs. Low level signals are usually carried by shielded coaxial cables and have RCA type plugs on the end. The low level is also called "line level". This is an un-amplified signal that might be heard on cheap earphones - but that's about it. It is similar to the output of a tape deck, DVD or phonograph. These signals require an amplifier to be heard. If you have a sub woofer output on your receiver or amplifier, you could run a patch cable between the low level input on the subwoofer and the subwoofer output of the amp or receiver. You receiver or amp may call this output "low frequency effects" or similar. The front and rear speakers would then connect directly to the receiver or amp's corresponding connections.

If you lack low level outputs on the amp or subwoofer, you'll need to run speaker wires from the amplifier or receiver's front left and right speaker output terminals to the subwoofer's high level input terminals. High level signals are speaker connections or amplified signals. These are typically connections that accept bare wire connections. The front speakers would then connect to the subwoofer's front left and right speaker output terminals. The rear speakers connect to the amplifier.

I hope this helps - and good luck!
1helpful
1answer

I want to connect YST-Sw1500 sub woofer to the AX-596 amplifier .How can I do the connections .

on ur subwoofer u will see HPF output, connect this output to MAIN IN of ur power amp (first remove jumper between pre-out and main in from ur power amp) connect pre-out of ur power amp to input 2 L&R (Left is also for mono input). the HFP selector switch will cut off 80Hz or 100Hz to the main input depending on the position enabling u to have high frequency sound on your main speakers. connect the speakers to the main output terminal of ur power amp. do not connect speakers on the woofer ouput.
make sure u are using the right impedance speakers. do not switch speaker impedance selector while the unit is on. 
2helpful
2answers

My amp automatically goes into protect mode

There are 4 reasons an amplifier tries to protect itself.

Overheating - thermal shutdown.

Over Impedence - The subwoofers installed are not configured into a load the amplifier can handle.

Output is grounded - a positive wire strand may be touching the ground terminal - a wire may be shorted, or a speaker voicecoil is blown.

Intennal problem - Output on amplifier blown, or some other component has failed.

Check your wiring to the amplifier again - if all is good - disconnect the speakers and try to power on. If the amplifier turns on normally - test the speakers for blown coils.

If the amplifier still goes into protect mode - the problem is internal and needs professional repair.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.
0helpful
1answer

No output

The output input cables try that first
0helpful
1answer

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.

0helpful
1answer

Sound

Hi monmax,
I hope you are aware that in bridged mode your amp will become monaural (single channel, double power). If you still wish to bridge it:
Switch of power.
Set mode switch behind amp to "bridge" position.
Connect speaker positive to CH1+ve terminal of amp output and connect speaker negative to CH2 +ve terminal.
Be aware that now, in bridged mode your amps output power delivery is 1100 watts for a 4 ohm speaker and 900 watts for an 8 ohm speaker. Make sure your speaker can handle that.
Peace
Jango.
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