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EV 7300A Power amplifier is blowing fuses. Any recommendations?

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Can u tell me what amp I need to run my 2 x 400w EV sb122 bass speakers and 2 x 300w EV sx300w top speakers


The wattage listed on the speakers is the peak wattage the speakers are rated to handle. You need amplifiers that do not exceed that maximum. A 50 watt amp would drive them fairly well but you would do better with a 100 to 200 watt amplifier. Note: the speaker rating is peak power handling. Amplifiers these days are usually rated at peak output too but sometimes (old or very high quality) amplifiers are rated at sustained power (RMS). If you are working with one of these amplifiers you will need an amplifier with a lower rating. Also make sure the amplifier is designed to run the same load as the speakers. This is usually either 8 ohm or 4 ohm. Make sure the speakers and amplifier are rated the same.

Apr 17, 2013 | Audio Players & Recorders

1 Answer

Fuse apx200m


HI,
If the fuse is blowing of then there is problem with the inverter stage of amplifier. There is an inverter stage in the amplifier to boost the 12V to + or - 30 to 40V normally. Its a switching circuit normally uses Mosfets and ferrite core transformer and a driving IC. If the mosfet is shot then the fuse will blow off immediately after power is connected.

Check on thing remove the REM connection and then connect the power. If the fuse blows the there is fault with the Mosfet Its short.
If the fuse blows only when you connect the REM then the amplifier stage is faulty.

Also check by disconnecting the speakers. if any of the speaker is faulty then there is a chance for fuse blow off.

Ajin

Apr 27, 2012 | Clarion APX280M 2-Channel Car Amp

1 Answer

Keeps blowing the fuse.


You may have a power supply issue, but I think it is more than likely it is the audio outputs that are the problem. I strongly recommend a professional look at it with a estimate in mind.

Dec 31, 2010 | Inter-M PA935 Amplifier

1 Answer

I have an spl gorilla series 1250watt amp that blows fuses


REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL BLOWS THE FUSE, THEN IT WILL NEED TO BE SERVICED. IF IT BLOWS THE FUSE BEFORE TURNING IT ON, THEN YOUR PROBLEM IS IN THE POWER SUPPLY SECTION. IF IT BLOWS THE FUSE AFTER ATTEMPTING TO TURN IT ON, THEN YOUR PROBLEM IS PROBABLY IN THE OUTPUT SECTION. ALSO KEEP IN MIND THAT THE P1'S ARE REALLY NOT RATED FOR THAT MUCH POWER AND YOU MAY HAVE DAMAGED THE VOICECOILS. BEFORE REINSTALLING THE AMPLIFIER, MAKE SURE TO CHECK THE SPEAKERS FOR SHORTED VOICECOILS OR YOU WILL POSSIBLY DAMAGE THE AMPLIFIER AGAIN. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Nov 19, 2009 | Rockford Fosgate P3001 Car Audio Amplifier

1 Answer

Kenwood KAC-729S keeps blowing fuses. Checked all cables, re-ran power, remote, and ground. All good, still blows them at power-up.


Hello opey_69a,

Here are the troubleshooting steps for fuses blowing.
1) Remove all wiring except ground, power and remote and see if the amp powers up without blowing the fuses. If it does, the problem is in the input cables or speaker wiring.
2) The use of loudspeaker impedances below the recommended minimums will cause the amp to draw excessive current - check.
3) A shorted or grounded RCA cable may cause the fuses to blow - check.
4) If an amplifier fuse blows continually, with only +12 volt, ground and remote leads connected, the amplifier is probably defective, most likely shorted output MOSFET's. In this case the amp needs professional repair or replacement.

Hope this helps.

Sep 19, 2009 | Kenwood KAC-729S Car Audio Amplifier

1 Answer

REVERSE TERMINAL WIRE AND TO MUCH VOLTAGE 18 TO 12V AMPLIFER


The Power Mosfets may be damaged and therefore causing your power supply fuses to blow. The fuses on your amp may be higher current rating than the ones in your vehicle and that is why they are not blowing

Sep 18, 2009 | Metrik Amplifiers MAX-1202 Car Audio...

1 Answer

I have a dual XIA3145 580 watt amp that keeps blowing fuses


Generally, this indicates that there's at least one shorted output transistor.

Disconnect all speaker wires from the 'amplifier's speaker terminals' and disconnect RCA/signal cables from the amp. If it powers up normally, the speakers/wiring need to be checked. If it still blows the fuses, the amp almost certainly has shorted output transistors and will need to be repaired.

I'd recommend using two 10 amp fuses. The amp will power up with 10 amp fuses if there is no problem. If there is a problem, there's less of a chance of doing more damage by using the 10 amp fuses.

Let me know if you have any other questions.

babin_perry@yahoo.com

Sep 04, 2009 | Dual Electronics illumiNITE XIA3145 Car...

1 Answer

I recently purchased a EV P3000 amp not working.


get all components from (rs components).take fuses down there and there let u know the right ones.mapdata?cxw3pxedhfvx-f8gdwxajgjiuqfsakdckaecygeczw4

Aug 03, 2009 | Audio Players & Recorders

1 Answer

I have a 25 wat fuse in my power wire connected to my amp and i keep blowing it. should i put a bigger fuse in it?


Hello grabert205,

You do not say if the fuse blows immediately upon powering up or while the amplifier is operating. If it blows immediately, I'd check the power and ground.

If it is blowing the fuse while operating, I'd try a 30A and see if it holds. At maximum output of 100 watts times 4, the amplifier needs about 31 amps of current at 12.8V. So driving it hard could certainly blow a 25A fuse.

Hope this helps.

Jun 13, 2009 | DHD LCD-9444 Car Audio Amplifier

1 Answer

Fuses


If you connect the fuses in parallel yes. You can use 12v circuit breakers as long as they are the same fast/medium/slow blow speed as the fuses the manufacturer recommends.

Thing is that most standard fuses are not made to exact standards and one of the two might blow earlier than the other which then in turn wil blow. I would go for either a 40 amp single fuse made for something other than a car situation and place that in the power line or get a 12v circuit breaker

Jan 11, 2008 | PPI2360 Car Audio Amplifier

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