vibe 250 protection again

[thechris 10+ year member]

this **** amp goes into protection when it hits low freq at high volume...how would i be able to eliminate this problem ...

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[Bumpin03 10+ year member]

buy a crossover and set it so it doesnt let the lower frequencies go through the amp.

 

[thechris 10+ year member]

hey i havent tried that yet ... i'll do that and see what happens ...

 

[MikeofTulsa Moderator]

or set the gains properly, use a large enough power wire, .......sounds like the gains are eitehr set to high....or the main power wire isnt large enough for the amp...its trying to draw more power than the wire will allow.....

 

[thechris 10+ year member]

im using 4 ga. and i know its not the gain ...

its all the way down ... im just using bass boost ...

or i would set it 1/3 and bass boost off ...

still same problem ...

stupid amp ...

amp is pissing me off ...

i should have gotten the opti ...

or better yet .... go crossfire ...

 

[avistar23 10+ year member]

Turn the gain all the way up to its max then try.

 

[MikeofTulsa Moderator]

mike? why'd u suggest that???? how large of an amp is this amp??? how many ampers does it draw? and how big is the ground wire????

 

[thechris 10+ year member]

sent message ...

AMPLIFIER GOES INTO PROTECTION WHEN I HIT LOW FREQ. AT HIGH VOLUMES ... HOW WOULD I ELIMINATE THIS PROBLEM...THANKS ....

???WOULD A CROSSOVER HELP???

reply...

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To: "CHRISTOPHER OCAMPO"

Subject: Re: VIBE 250

Date: Mon, 19 May 2003 11:16:07 -0400

Sounds like the amp is lacking power, look into the amperage of the fuse prior to your battery it should be aprox. 10 amps higher than the amperage fuses loaded in your amplifier to begin with.

my translation ... my fuses on the amp are 25+25=50 ... should my fuse on the wire be 60 then? if so ... im using 4 qa. to distrubitor block to 8 ga. fuse is i believe 80. please help

 

[avistar23 10+ year member]

Originally posted by Goddyd4me mike? why'd u suggest that???? how large of an amp is this amp??? how many ampers does it draw? and how big is the ground wire????

Just to make shure that it wasn't a gain problem.

 

[MikeofTulsa Moderator]

ok...so the wire size doesnt appear to be a problem.....how are the subs wired? what ohm load is the amp seeing??? what ohm load is the amp stable to????

 

[thechris 10+ year member]

...subs are crossfire p1 12's dvc (4 ohms per coil)

...amp lanzar vibe 250 2x250@4 ohms 2 x450@2 ohms 1x900@4 ohms bridge (bs specs)

either way i wire them up 2 channel or bridge it still would go into protection ...

when it hits low freq. at high volumes ...

i read on another forum (dbdragracing.com) that the vibe series's protection circuit are very sensitive ... that really sucks ... but im hoping for a solution ... cause i know these subs can really hit ... i ran them off one off my boys rf 2000 amp at 700 watt total to both woofer and it was two to three times louder ... please help me ... thanks

 

[MikeofTulsa Moderator]

so u have them wired like either of the following and it happens correct?

thats a 2ohm sterio load which is to low for the amp

and thats a 1ohm mono load which is to low......

so if wired like either of the above mentioned ways your presenting to low of an ohm load for your amp....

 

[Wonderbread 5,000+ posts]

what's probably hapenning is this. the amp is probably barely keeping up with the low load. It's straining to stay active. when these long low notes come, teh impedance across the coils does drop somewhat significantly. this is why it cuts out. these impedance drops are too low for the amp to stay stable.

 

[thechris 10+ year member]

amp is 2 ohms stereo stable 4 ohms mono stable

 

[thechris 10+ year member]

so i would wired them up either 2 ohms stereo ... or 4 ohms bridged mono ... not 1 ohm mono