ok this is a weird one,
i have the power cable hooked up to the battery then it gose through a fuse in the cored, then to the amp. my amp is a 425W and my speakers are 12inch 600W each, i just briged the speakers today so they are getting more W's and the fuse in the cable blows vary fast, i can get about 2 BooMs out of the subs befor the fuse in the cable blows,
i was thinking it could be the ground wire, but i don't see how that would make the fuse blow, it has to be because it's drawing to much curnt
thanks for any help
Replies (5)
Swez on 09/24/2003 06:49:46
Fuses blow for 2 reasons:
1. Dead short (circuit blows immediately)
2. Too much current draw for the fuse (takes a few seconds of audio, the poof goes the fuse)
Your amp... is this a MONO (1 channel amp) or a 2 channel amp, bridged to a single channel?
Also, what is the voice coil resistance (ohms) of your subs and how are the subs wired to the amp? Fuse size and wire gage used for power and ground wires???
It sounds like the speakers may be wired too low of an ohms load for this amp and as it tried to support the load, it draws way too much current and poof, your fuse goes out.
Can you give more details on the subs and amp used here? Brand and model numbers are most helpful. Then we can make a few recommendations to cure this ill.
Swez
HGI on 09/24/2003 17:43:43
ok the subs are 12 inch kentwood 600w, 4ohms, the fuse is a 30,
the speaker wire is a 6 or 8 guage i cant really remeber,
and the power and ground wire are like pff 4 or 2 guage,
the amp is a 425W MTX RT2200X,
it's a 2 channle and the subs are wired up separatly, i had it wired this way for about 4 month and it worked fine, the fuse only blew on me once in that whole time,,, i just bridged the subs yesterday and now the fuse blows to the moon.
if u need anymore info i can give more
ohh could it be the gain and bass settings on the amp?
and the amp has a x-over witch is on
thanks
Swez on 09/24/2003 19:49:47
Just a note, we bridge amp channels... we configure subs in series, parallel or a combination of the two.
If I get your meaning, you probably wired both subs in parallel, then bridged the 2 channel amp, down to a single channel. This nets a 2 ohm load to the amplifier while bridged and it cannot handle that low an ohmic load.
Is this the amp you are using now? http://www.mtxaudio.com/caraudio/archive/rt2200.cfm
If yes, this is a very small amp and not much power to give you much bass, no matter what subs are used. (200 RMS when bridged at 4 ohms min.)
If you want more bass power, consider a larger MONO Class D amp as it will handle 2 ohm loads w/o any trouble. The only thing I am not sure of, is the RMS power rating on your present subs.
Comments?
Swez
HGI on 09/25/2003 02:22:46
sweet dude, i understand now why this is happening.
thanks for all the time and help u provided
peace
Swez on 09/25/2003 09:33:57
You bet... tell your friends about the site and invite them to come and chat, ask question etc.
Swez ><>
i have the power cable hooked up to the battery then it gose through a fuse in the cored, then to the amp. my amp is a 425W and my speakers are 12inch 600W each, i just briged the speakers today so they are getting more W's and the fuse in the cable blows vary fast, i can get about 2 BooMs out of the subs befor the fuse in the cable blows,
i was thinking it could be the ground wire, but i don't see how that would make the fuse blow, it has to be because it's drawing to much curnt
thanks for any help
Replies (5)
Swez on 09/24/2003 06:49:46
Fuses blow for 2 reasons:
1. Dead short (circuit blows immediately)
2. Too much current draw for the fuse (takes a few seconds of audio, the poof goes the fuse)
Your amp... is this a MONO (1 channel amp) or a 2 channel amp, bridged to a single channel?
Also, what is the voice coil resistance (ohms) of your subs and how are the subs wired to the amp? Fuse size and wire gage used for power and ground wires???
It sounds like the speakers may be wired too low of an ohms load for this amp and as it tried to support the load, it draws way too much current and poof, your fuse goes out.
Can you give more details on the subs and amp used here? Brand and model numbers are most helpful. Then we can make a few recommendations to cure this ill.
Swez
HGI on 09/24/2003 17:43:43
ok the subs are 12 inch kentwood 600w, 4ohms, the fuse is a 30,
the speaker wire is a 6 or 8 guage i cant really remeber,
and the power and ground wire are like pff 4 or 2 guage,
the amp is a 425W MTX RT2200X,
it's a 2 channle and the subs are wired up separatly, i had it wired this way for about 4 month and it worked fine, the fuse only blew on me once in that whole time,,, i just bridged the subs yesterday and now the fuse blows to the moon.
if u need anymore info i can give more
ohh could it be the gain and bass settings on the amp?
and the amp has a x-over witch is on
thanks
Swez on 09/24/2003 19:49:47
Just a note, we bridge amp channels... we configure subs in series, parallel or a combination of the two.
If I get your meaning, you probably wired both subs in parallel, then bridged the 2 channel amp, down to a single channel. This nets a 2 ohm load to the amplifier while bridged and it cannot handle that low an ohmic load.
Is this the amp you are using now? http://www.mtxaudio.com/caraudio/archive/rt2200.cfm
If yes, this is a very small amp and not much power to give you much bass, no matter what subs are used. (200 RMS when bridged at 4 ohms min.)
If you want more bass power, consider a larger MONO Class D amp as it will handle 2 ohm loads w/o any trouble. The only thing I am not sure of, is the RMS power rating on your present subs.
Comments?
Swez
HGI on 09/25/2003 02:22:46
sweet dude, i understand now why this is happening.
thanks for all the time and help u provided
peace
Swez on 09/25/2003 09:33:57
You bet... tell your friends about the site and invite them to come and chat, ask question etc.
Swez ><>
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