amplifier problem.

[timo38]

Hey guys,

for the past 6 - 8 months ive ran my Alpine MRV-F450 5 channel amp with 2 bridged Alpine type R splits with 8g power and earth wires, and its ran just fine.

about a week ago I decided to make use of my 5th channel (sub channel) and I bought a DVC JVC CS-GX2200 12" subwoofer, I hooked up the sub, and it played for about 5 seconds and the whole stereo cut out and the amp went into protection mode (red light came on). Since then I have disconnected the sub and now my amp cuts in and out and goes into protection mode each time.

I have checked all my connections and ground point and all seems to be in check which has really left me scratching my head.

Im hoping i havent fried my amp :|

If anyones had any similar problems or knows of a possible cause please feel free to help //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

An hour a day of driving with no music is very dull!

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[SicAudio 5,000+ posts]

wow 8 guage really? voltage drop dude check that first

 

[SicAudio 5,000+ posts]

and the ohm load at the amp!!!

 

[timo38]

Im a major greenhorn with the car audio technical side, would you be able to tell me how to check for volt drop and ohm load?

also would 8 gauge be too small for what im running?

 

[timo38]

Im a major greenhorn with the car audio technical side, would you be able to tell me how to check for volt drop and ohm load?

also would 8 gauge be too small for what im running?

 

[timo38]

Im a major greenhorn with the car audio technical side, would you be able to tell me how to check for volt drop and ohm load?

also would 8 gauge be too small for what im running?

 

[timo38]

Im a major greenhorn with the car audio technical side, would you be able to tell me how to check for volt drop and ohm load?

also would 8 gauge be too small for what im running?

 

[timo38]

arrrrrrgh my computer had a fit and posted it more than once.

 

[SicAudio 5,000+ posts]

u need a voltmeter set it to 20 volt dc and go to the amp while it is playing bass hvy songs and make syure the vlotage is above 12 volts ( you cant do this because u siad ur amp is stuck in protect? ) for ohms set it to the ohms scale or continuity and probe the speaker terminals.

 

[timo38]

it goes in and out of protection mode. when the volume is above 20 on my pioneer head unit it cuts in and out.

 

[SicAudio 5,000+ posts]

then check the sub for ohm reading un hook it no power use the speaker wire to the sub but disconnected from the amp. i bet you are running it below the amps minimum load. is it a dual coil sub? if it is ur fawked lolz

 

[timo38]

yeah its a dual voice coil, youve got me all worrried now haha :|

 

[Effidasus 10+ year member]

That battery is small but I dont see that causing your problem.

I would check voltage at the alt, batt, and amp and compare them all under the same load. That will get you started.

Iraggi

 

[SicAudio 5,000+ posts]

yeah its a dual voice coil, youve got me all worrried now haha :|

•50 watts RMS x 4 + 200 watts RMS x 1 at 4 ohms

•60 watts RMS x 4 at 2 ohms + 200 watts RMS x 1 at 4 ohms

•120 watts RMS x 2 + 200 watts RMS x 1 at 4 ohms

your amp is only 4 ohm stable x 1 channel for the sub ur fawked i bet ya smoked it.

 

[SicAudio 5,000+ posts]

That battery is small but I dont see that causing your problem.
I would check voltage at the alt, batt, and amp and compare them all under the same load. That will get you started.

retardedhicksister****er

he never said anything about a battery so stop posing as Dom you ****ing ***.