hey what's up all, i'm new to the board here and i was hopin somebody might have some advice or tell me what's up......anyways......i've got a 1000wbd fosgate amp and 2 fubr power acoustik 12's...with 4 gauge wires.....and i was popin fuses left and right.......so i went to the store and the guy convinced me to by a 100 w circuit breaker to replace the inline fuse......he said i'd never have to worry about fuses again...so i installed and went for a drive and it was real nice and loud......but then i came back home.......and when i went to listen to it a second time.....it can't even go as loud as it was when i was using the smaller in-line fuse...and the system kicks off when i turn it up too "loud"....but if i shut cd player off and back on the subs will kick back on.......i was reading about it on the internet....and i was wondering if i mesed up my voice coils(fubr has duals)....would that cause the system to bug up and shut off or what?
Replies (6)
ttocs on 04/25/2006 11:19:01
you have all 4 voice coils hooked up right? Is the gain on the amp too high? sounds like your amp is seeing too low of an impedence load and shutting down to protect itself. Do you have all the coils wired in parallel?
swez on 04/25/2006 12:06:20
This is one of the most common problems we hear on this forum. You are in good company!
Here are the specs on this amp: This amp is 1 ohm stable and puts out > 1000 watts RMS # 1 ohm loads.
http://acaraudio.com/product_info.php?cPath=22_36&products_id=1435
It requires 1/0 gage power and ground wires and a 150A fuse. If you don't use this level of power management gear, this amp will cycle on and off as the relay trips, (over current) then will cool down and come back on in a few minutes. Also, overtime, breakers that cycle often, will develop charred contacts. Now, the system gets a lower voltage due to high resistance at the contacts. (corrosion from arcing)
Your guy that recommended the 100A breaker, gave you a bum steer. He probably did not realize how much current this amp can draw, or only had 100A breakers on hand. YOU NEED A 150A ANL FUSE LINK FOR THIS AMP ALONE. Especially if running this amp at 1 ohm loads.
Also, if the HU and amp gains are set improperly, the amp will drive hard, overheat and go into protect mode to cool. To set this correctly, we match the HU RCA voltage output to the amp gain input. (Ie: A given HU specs the RCA voltage @ 2.0 volts [some have different voltage values] @ 75-80% of full volume) The amp gain is also set to 2.0 volts)
If the HU voltage is say 4.0 volts... and we set the amp gain at say 2.0 volts, the amp will sound louder, but clip heavily, overheat and shut off.
Hope that helps,
Swez
robertcoon on 04/25/2006 13:04:51
hey thnx for the help i'm gunna go check everything out......and also the amp in thepic isn't my amp.....i've got the older version i think......it's more rigid like the old amps......but i'll go check it out and hopefuilly i can figure somethin out......hopefully i didn't fry my speakers though that wuld suck
robertcoon on 04/25/2006 13:30:41
k....i just went and unhooked the speaker i'm pretty sure is blowm......and the problem went away........any ideas?
ttocs on 04/25/2006 16:20:13
how are you sure it is blown? so you are running both voice coils on one speaker?
Taking one speaker out will fix the problem. IF you want to keep the 2nd sub you will need to upgrade your wiring size, and maybe your alt........
swez on 04/25/2006 21:16:25
That was my next question too... are both subs working? If one sub shorts out the amp will continue to work at low power to some degree, But, if one coil fries, it will usually change the load impedence to amp and cause it to shut off at high power.
The Fubar series are pretty strong subs, but they are not bullet proof in the wrong enclosure design or if they get too much clipped signals. Even a smaller amp will kill a potent sub when we run the amp into heavy clipping mode a lot, or use the wrong enclosure design.
Swez
Replies (6)
ttocs on 04/25/2006 11:19:01
you have all 4 voice coils hooked up right? Is the gain on the amp too high? sounds like your amp is seeing too low of an impedence load and shutting down to protect itself. Do you have all the coils wired in parallel?
swez on 04/25/2006 12:06:20
This is one of the most common problems we hear on this forum. You are in good company!
Here are the specs on this amp: This amp is 1 ohm stable and puts out > 1000 watts RMS # 1 ohm loads.
http://acaraudio.com/product_info.php?cPath=22_36&products_id=1435
It requires 1/0 gage power and ground wires and a 150A fuse. If you don't use this level of power management gear, this amp will cycle on and off as the relay trips, (over current) then will cool down and come back on in a few minutes. Also, overtime, breakers that cycle often, will develop charred contacts. Now, the system gets a lower voltage due to high resistance at the contacts. (corrosion from arcing)
Your guy that recommended the 100A breaker, gave you a bum steer. He probably did not realize how much current this amp can draw, or only had 100A breakers on hand. YOU NEED A 150A ANL FUSE LINK FOR THIS AMP ALONE. Especially if running this amp at 1 ohm loads.
Also, if the HU and amp gains are set improperly, the amp will drive hard, overheat and go into protect mode to cool. To set this correctly, we match the HU RCA voltage output to the amp gain input. (Ie: A given HU specs the RCA voltage @ 2.0 volts [some have different voltage values] @ 75-80% of full volume) The amp gain is also set to 2.0 volts)
If the HU voltage is say 4.0 volts... and we set the amp gain at say 2.0 volts, the amp will sound louder, but clip heavily, overheat and shut off.
Hope that helps,
Swez
robertcoon on 04/25/2006 13:04:51
hey thnx for the help i'm gunna go check everything out......and also the amp in thepic isn't my amp.....i've got the older version i think......it's more rigid like the old amps......but i'll go check it out and hopefuilly i can figure somethin out......hopefully i didn't fry my speakers though that wuld suck
robertcoon on 04/25/2006 13:30:41
k....i just went and unhooked the speaker i'm pretty sure is blowm......and the problem went away........any ideas?
ttocs on 04/25/2006 16:20:13
how are you sure it is blown? so you are running both voice coils on one speaker?
Taking one speaker out will fix the problem. IF you want to keep the 2nd sub you will need to upgrade your wiring size, and maybe your alt........
swez on 04/25/2006 21:16:25
That was my next question too... are both subs working? If one sub shorts out the amp will continue to work at low power to some degree, But, if one coil fries, it will usually change the load impedence to amp and cause it to shut off at high power.
The Fubar series are pretty strong subs, but they are not bullet proof in the wrong enclosure design or if they get too much clipped signals. Even a smaller amp will kill a potent sub when we run the amp into heavy clipping mode a lot, or use the wrong enclosure design.
Swez
Copyright ClubKnowledge 2009 * All Rights Reserved
