Planning on getting a RE XXX 12" or 15" with quad 2ohm voice coil with a PPI dcx-1000.4 which is 250w x 4 into 2ohms
can this work on the sub.thanks for any help
Replies (8)
P0werLifter on 12/14/2004 23:51:55
Good Choice of the subwoofer. I own a RE XXX 15 and love it. Very impressive.
May i ask why you wish to run the quad 2ohm coils with a 4channel amplifier?
Running a mono amplifier is much better for subwoofer applications due to the high efficiency
Id reccomend going with a solid 1500watt mono amp with the Dual Voice Coil configuration.
What type of enclosure are you going to build for it? Whats your focus? SPL? SQL? SQ?
swez on 12/15/2004 04:55:21
Agreed! DVC's are tough enough for most folks to tinker with. Couple that with a 4 channel amp, I don't think it's a wise choice as gain matching each half of the amp to this sub could present some challenges unless you have some heavy duty load resistors (4 ohms each) and an AC meter to match the gains. Also need a test tone generator or test CD.
Finally, that's a fine amp you have... but a Class D MONO amp is much more efficient on power consumption VS output power. That 4 channel is probably a Class A/B amp (50-60% eff.) A Class D sub amp of same power is more like 90% eff. A lot less current draw with a Class D or T MONO amp.
Swez
BassInYourFace on 12/15/2004 22:49:43
Sorry but thats the only amp i have swez i will be getting some help from some friends of mine who are installers i'm from the bahamas and would really like to try this sub because folk here only know the big brands (jl,rf.pioneer,etc) and i would like to try something different, i had a orion p-series 10" but some ass mess with it, was using it for sq competition and came second on my first try so now i'm looking at trying those because i hear some very positive responds about them and the prices aren't bad comparable to the w7
MrBrownstone on 12/16/2004 00:20:38
if it's the only amp you have, then I'd consider running only one side of the amplifier. Not that you couldn't do it properly, but I just don't that you could match both sides up very well....and it would be such an inefficient installation.
BassInYourFace on 12/16/2004 08:14:35
I'm planning on wiring two of the coil in series the get a daul 4 ohm setup also where can I find them in the florida area I live in the bahamas
swez on 12/16/2004 09:01:44
That's the best you can do here... wire a pair of coils in series for a 4 ohm load, then the other coil set, same thing.
Bridge the amp down to 2 channels and hook up your sub, 4 ohms per ganged coils. Once you get some bass signals going, (long test tones at 40-60 Hz., are best for this part) get out the voltage meter and measure the voltage going to each coil set.
Do this at low signal levels of say 5-10 volts AC readings, until gains are matched and each ganaged coil is getting the same voltage readings.
Once you have them balanced, bring up the HU input signal and try to get say 20-25 volts off each coil set. If they don't match, adjust gains again until they do. (that's 100-150 watts per coil set range)
Repeat this test again as you are shooting for ~40 volts AC to each coil set to get full power from this amp. (that's ~500 watts RMS per coil set) off each amp channel. That's max power this amp can deliver with clean, non-clipped signals.
Got the idea?
Swez
BassInYourFace on 12/16/2004 16:15:59
yeah thanks for the help
swez on 12/16/2004 18:45:21
You bet... good luck on this nice SQL application. That RE XXX is a great sub.
Swez
can this work on the sub.thanks for any help
Replies (8)
P0werLifter on 12/14/2004 23:51:55
Good Choice of the subwoofer. I own a RE XXX 15 and love it. Very impressive.
May i ask why you wish to run the quad 2ohm coils with a 4channel amplifier?
Running a mono amplifier is much better for subwoofer applications due to the high efficiency
Id reccomend going with a solid 1500watt mono amp with the Dual Voice Coil configuration.
What type of enclosure are you going to build for it? Whats your focus? SPL? SQL? SQ?
swez on 12/15/2004 04:55:21
Agreed! DVC's are tough enough for most folks to tinker with. Couple that with a 4 channel amp, I don't think it's a wise choice as gain matching each half of the amp to this sub could present some challenges unless you have some heavy duty load resistors (4 ohms each) and an AC meter to match the gains. Also need a test tone generator or test CD.
Finally, that's a fine amp you have... but a Class D MONO amp is much more efficient on power consumption VS output power. That 4 channel is probably a Class A/B amp (50-60% eff.) A Class D sub amp of same power is more like 90% eff. A lot less current draw with a Class D or T MONO amp.
Swez
BassInYourFace on 12/15/2004 22:49:43
Sorry but thats the only amp i have swez i will be getting some help from some friends of mine who are installers i'm from the bahamas and would really like to try this sub because folk here only know the big brands (jl,rf.pioneer,etc) and i would like to try something different, i had a orion p-series 10" but some ass mess with it, was using it for sq competition and came second on my first try so now i'm looking at trying those because i hear some very positive responds about them and the prices aren't bad comparable to the w7
MrBrownstone on 12/16/2004 00:20:38
if it's the only amp you have, then I'd consider running only one side of the amplifier. Not that you couldn't do it properly, but I just don't that you could match both sides up very well....and it would be such an inefficient installation.
BassInYourFace on 12/16/2004 08:14:35
I'm planning on wiring two of the coil in series the get a daul 4 ohm setup also where can I find them in the florida area I live in the bahamas
swez on 12/16/2004 09:01:44
That's the best you can do here... wire a pair of coils in series for a 4 ohm load, then the other coil set, same thing.
Bridge the amp down to 2 channels and hook up your sub, 4 ohms per ganged coils. Once you get some bass signals going, (long test tones at 40-60 Hz., are best for this part) get out the voltage meter and measure the voltage going to each coil set.
Do this at low signal levels of say 5-10 volts AC readings, until gains are matched and each ganaged coil is getting the same voltage readings.
Once you have them balanced, bring up the HU input signal and try to get say 20-25 volts off each coil set. If they don't match, adjust gains again until they do. (that's 100-150 watts per coil set range)
Repeat this test again as you are shooting for ~40 volts AC to each coil set to get full power from this amp. (that's ~500 watts RMS per coil set) off each amp channel. That's max power this amp can deliver with clean, non-clipped signals.
Got the idea?
Swez
BassInYourFace on 12/16/2004 16:15:59
yeah thanks for the help
swez on 12/16/2004 18:45:21
You bet... good luck on this nice SQL application. That RE XXX is a great sub.
Swez
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