i just got a new 1800w power acoustics amp and 2 power acoustic fubar 12's. i put the 12's in my bandpass and i cant get them to sound good, if i unplug one rca to the amp it sounds awesome, but then i plug it back in and it sounds like crap. i checked all my connections and polarity, i dont know whats going on, it seems like the speakers are fighting each other but it doesnt matter which one i unplugg to make it sound good.
Replies (5)
swez on 03/29/2009 20:32:10
A simple test can tell if polarity is the issue here. Just rewire one sub polarity at the amp or a sub and see what the results are. If the bass comes up nicely, you have recified the problem.
What is the model # of this PA amp you have now? (A link would be most helpful. These Fubar subs, what voice coils do they have? (2+2 or 4+ 4 DVC's?)
Swez
whysohigh on 03/29/2009 20:46:06
its a ps21800 http://www.audiodiscounters.com/shopping/POWER-ACOUSTIK-PS21800-p-2012.html
all i can find for the voice coil info is its got dual 4ohm voice coils and it also says its a 2" basv voice coil.
swez on 03/29/2009 21:45:40
Good feedback and I can see this is a 2 channel amp and you have a pair of 4+4 DVC subs.
The easiest way to wire these subs is to treat the package as one amp channel per sub. (2 ohms per channel is just right)
This is the easiest way to do this if your BP sub box has dual speaker terminals. (One terminal cup pre sub) If that is true, here's the wiring configuration for each sub to its own amp channel: Option #1
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=1&woofer_imp=4
If your BP box only has 1 terminal cup, then we have to employ another method that will work equally well. (Series/Parallel wiring and bridge the amp to MONO. Use Option #2... a 4 ohm load
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=2&woofer_imp=4
Polarity is the key to strong bass for this package and one sub is likeley out of phase to the other.
Comments?
Swez
whysohigh on 03/31/2009 18:41:15
it was the polarity coming off my line-out converter, it was backwards. thanks so much you were a big help
swez on 03/31/2009 22:13:15
Glad you mentioned that part as that is not as common a problem, but nets the same issues. (Subs are out of phase)
Good catch!
Swez
Replies (5)
swez on 03/29/2009 20:32:10
A simple test can tell if polarity is the issue here. Just rewire one sub polarity at the amp or a sub and see what the results are. If the bass comes up nicely, you have recified the problem.
What is the model # of this PA amp you have now? (A link would be most helpful. These Fubar subs, what voice coils do they have? (2+2 or 4+ 4 DVC's?)
Swez
whysohigh on 03/29/2009 20:46:06
its a ps21800 http://www.audiodiscounters.com/shopping/POWER-ACOUSTIK-PS21800-p-2012.html
all i can find for the voice coil info is its got dual 4ohm voice coils and it also says its a 2" basv voice coil.
swez on 03/29/2009 21:45:40
Good feedback and I can see this is a 2 channel amp and you have a pair of 4+4 DVC subs.
The easiest way to wire these subs is to treat the package as one amp channel per sub. (2 ohms per channel is just right)
This is the easiest way to do this if your BP sub box has dual speaker terminals. (One terminal cup pre sub) If that is true, here's the wiring configuration for each sub to its own amp channel: Option #1
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=1&woofer_imp=4
If your BP box only has 1 terminal cup, then we have to employ another method that will work equally well. (Series/Parallel wiring and bridge the amp to MONO. Use Option #2... a 4 ohm load
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=2&woofer_imp=4
Polarity is the key to strong bass for this package and one sub is likeley out of phase to the other.
Comments?
Swez
whysohigh on 03/31/2009 18:41:15
it was the polarity coming off my line-out converter, it was backwards. thanks so much you were a big help
swez on 03/31/2009 22:13:15
Glad you mentioned that part as that is not as common a problem, but nets the same issues. (Subs are out of phase)
Good catch!
Swez
Copyright ClubKnowledge 2009 * All Rights Reserved
