hey guys, first of all, thx for the help on my post yesterday, u were right on the dot. now that everythings working, i just need a bit more help to further my knowledge and experience.
heres the info:
i have a 12" dual 4ohm sub connected to this amp: Crunch PZi250.2 1000watt max, im not quite clear on the different options as far as the wiring and what the ohms mean. right now its just connected from 1 channel of the amp to 1 voicecoil on the sub. how much wattage am i getting? and would one of these options below give me more power? my buddy told me i should wire the second channel to the other voicecoil, and another person told me to use a + from one channel and the - from the other instead of running 2 separate speaker wires therefore 'bridging' the connection,but hes just taking a guess at it too i think, any info u can provide me is appreciated as always
i got this info on it from the amp manual if that helps 250W x 2-Ch @ 4-Ohms or 500W x 2-Ch @ 2-Ohms or 1000W x 1-Ch @ 4-Ohms
Replies (5)
vkan702 on 04/27/2006 17:43:26
just wanted to add the subwoofer info:
its a 12" Rockford Fosgate Punch DVC rfp1212
Ash on 04/27/2006 19:02:22
In reality, that sub and amp combo is not a good match. The sub handles 400rms and made to run loads into 2 ohms (parallel) or 8 ohms. Yet the amp is maximized at 4 ohms bridged. The only way to run this sub is one channel to each coil, which may not be enough power to get the full potential. Wired in a 8 ohm bridged will net the same results as well. If possible, I would find a suitable 2 ohm maximized class D monoblock amp within +/- 50rms of the sub's 400rms watts handling.
vkan702 on 04/27/2006 22:08:50
cool thx, i will run one channel to each coil like you said, i know its still not gonna get its full potential. My friend gave me the sub cuz he wasnt using it and i just bought the amp on sale sort of an impulse thing since i had a sub laying around all of a sudden. anyway, thats the reason i dont have a good match. I was actually thinking of getting a new sub down the road because this ones been around for years and has probably taken some wear and tear. you mentioned getting a different amp, so am i better off keeping the sub and changing the amp? or is there a nice sub you can recommend to match the amp?
swez on 04/28/2006 10:09:18
If you buy a new sub, either use a 4 ohm SVC type or 2+2 DVC. Here, you can bridge the amp MONO and get a very good match.
What size fuse(s) are used in this amp model? That will help determine the power output and sub to handle it. It looks like this amp may be close to 500 watts RMS when bridged to a 4 ohm load. If you have ~60A's worth of fusing, this needs a pretty stong sub. If fused below 40A's, a modest sub is fine. (300 watts RMS range)
Swez
Ash on 04/28/2006 19:02:07
Made by Maxxsonics that amp isn't a bad one at all with mosfet outputs. It should have two 25 amp fuses with a bridged output of 450 rms. Too bad that sub isn't matched in ohms, else they would be a good pair.
As far as which one to switch, depends. Usually power is cheap, yet a decent sub can be too if you can use the same box. If you give the cubic feet the sub is in, a match can be found.
heres the info:
i have a 12" dual 4ohm sub connected to this amp: Crunch PZi250.2 1000watt max, im not quite clear on the different options as far as the wiring and what the ohms mean. right now its just connected from 1 channel of the amp to 1 voicecoil on the sub. how much wattage am i getting? and would one of these options below give me more power? my buddy told me i should wire the second channel to the other voicecoil, and another person told me to use a + from one channel and the - from the other instead of running 2 separate speaker wires therefore 'bridging' the connection,but hes just taking a guess at it too i think, any info u can provide me is appreciated as always
i got this info on it from the amp manual if that helps 250W x 2-Ch @ 4-Ohms or 500W x 2-Ch @ 2-Ohms or 1000W x 1-Ch @ 4-Ohms
Replies (5)
vkan702 on 04/27/2006 17:43:26
just wanted to add the subwoofer info:
its a 12" Rockford Fosgate Punch DVC rfp1212
Ash on 04/27/2006 19:02:22
In reality, that sub and amp combo is not a good match. The sub handles 400rms and made to run loads into 2 ohms (parallel) or 8 ohms. Yet the amp is maximized at 4 ohms bridged. The only way to run this sub is one channel to each coil, which may not be enough power to get the full potential. Wired in a 8 ohm bridged will net the same results as well. If possible, I would find a suitable 2 ohm maximized class D monoblock amp within +/- 50rms of the sub's 400rms watts handling.
vkan702 on 04/27/2006 22:08:50
cool thx, i will run one channel to each coil like you said, i know its still not gonna get its full potential. My friend gave me the sub cuz he wasnt using it and i just bought the amp on sale sort of an impulse thing since i had a sub laying around all of a sudden. anyway, thats the reason i dont have a good match. I was actually thinking of getting a new sub down the road because this ones been around for years and has probably taken some wear and tear. you mentioned getting a different amp, so am i better off keeping the sub and changing the amp? or is there a nice sub you can recommend to match the amp?
swez on 04/28/2006 10:09:18
If you buy a new sub, either use a 4 ohm SVC type or 2+2 DVC. Here, you can bridge the amp MONO and get a very good match.
What size fuse(s) are used in this amp model? That will help determine the power output and sub to handle it. It looks like this amp may be close to 500 watts RMS when bridged to a 4 ohm load. If you have ~60A's worth of fusing, this needs a pretty stong sub. If fused below 40A's, a modest sub is fine. (300 watts RMS range)
Swez
Ash on 04/28/2006 19:02:07
Made by Maxxsonics that amp isn't a bad one at all with mosfet outputs. It should have two 25 amp fuses with a bridged output of 450 rms. Too bad that sub isn't matched in ohms, else they would be a good pair.
As far as which one to switch, depends. Usually power is cheap, yet a decent sub can be too if you can use the same box. If you give the cubic feet the sub is in, a match can be found.
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