Originally posted by ThomasW
EP1500 and RL-p15 dual 2ohm or dual 4ohm?
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EP1500 and RL-p15 dual 2ohm or dual 4ohm?
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The VC's of the dual 2 ohm driver should be wired in series to create a single 4 ohm load. Strap the amp into mono and hold on ....:wink:
IB subwoofer FAQ page
"Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson- Bottom
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Originally posted by ThomasWThe VC's of the dual 2 ohm driver should be wired in series to create a single 4 ohm load. Strap the amp into mono and hold on ....:wink:- Bottom
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Lots of people are running these amps strapped it's no big deal since it will barely be off idle powering a ported sub.
You can certainly buy the dual 4 ohm unit and run one VC to each channel.
The computer models will look a bit different; but in the real world, any performance difference between the 2-2 ohm and the 2-4 ohm drivers will be minimal.
IB subwoofer FAQ page
"Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson- Bottom
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Originally posted by palmtreeI was under the impression that a 4 ohm bridged-mono load stresses the amp the same as a stereo 2 ohm load. But I am no expert at this stuff--actually, I may not even be to the "novice" level yet. :B
For example, if the amp can deliver 2 x 400 watts into 4 ohms and 2 x 700 into 2 ohms or 1400 watts bridged into 4 ohms, the most you can get into the dual 4 ohm speaker would be 800 watts, where as with the dual 2 ohm speaker you could get 1400 watts. This is assuming that the amp is not rated for bridged into 2 ohms.
I should end this by stating that this is my understanding of how all this works and there is always room for error.
Brian Walter- Bottom
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Originally posted by ThomasWThe VC's of the dual 2 ohm driver should be wired in series to create a single 4 ohm load. Strap the amp into mono and hold on ....:wink:- Bottom
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For example, if the amp can deliver 2 x 400 watts into 4 ohms and 2 x 700 into 2 ohms or 1400 watts bridged into 4 ohms, the most you can get into the dual 4 ohm speaker would be 800 watts, where as with the dual 2 ohm speaker you could get 1400 watts.
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You are correct that it is not quite that simple, but I would expect the relationship between the two drivers to be similar to that of my example. Assuming the curve you have shown is for the RL-p15 dual 4 ohm voice coil, it would be interesting to see the curve of the dual 2 ohm voice coil driver plotted on the same graph. I suspect you would see the dual 2 ohm curve about 1/2 of the dual 4 ohm curve. If so, my assumption of close to double the power would be pretty close through out the frequency response.
Brian Walter- Bottom
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It sounds like your amp can handle the 2 ohm load, so I agree with Thomas and Kyle, go with the dual 2 ohm driver and wire the voice coils in series and drive it with the amp in bridge mode.
How long does it take to get one of the D2's? I've been seriously thinking of getting one myself.
Brian Walter- Bottom
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Originally posted by Brian WalterIt sounds like your amp can handle the 2 ohm load, so I agree with Thomas and Kyle, go with the dual 2 ohm driver and wire the voice coils in series and drive it with the amp in bridge mode.
How long does it take to get one of the D2's? I've been seriously thinking of getting one myself.
Brian Walter- Bottom
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Quote:
Originally Posted by ThomasW
The VC's of the dual 2 ohm driver should be wired in series to create a single 4 ohm load. Strap the amp into mono and hold on ....
So your saying its better to bridge the EP1500 and wire the D2 in series than wire each channel to each VC? Why would it be better? Will you realy hear a difference doing it the bridge way? How would I know if the amp could not handle the 2 ohm load? Wont the amp blow the built in fuse and shut off or does it do something else if it cant handle it? I cant say I have ever had a problem running a 2ohm load unless its doing something Im not noticing.- Bottom
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Originally posted by Jerm357Quote:
So your saying its better to bridge the EP1500 and wire the D2 in series than wire each channel to each VC? Why would it be better?
Brian Walter- Bottom
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I think there are several people running the D2 with an EP1500. I haven't seen any bad reports. I wouldn't worry about it.
I personnaly run two D2s on an EP2500. Both drivers are wired in series and hooked up to seperate channels. So, I guess this is actually less power to each driver than an EP1500 in mono would be to a single. And, I've haven't had a problem.- Bottom
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Originally posted by ---k---I think there are several people running the D2 with an EP1500. I haven't seen any bad reports. I wouldn't worry about it.
I personnaly run two D2s on an EP2500. Both drivers are wired in series and hooked up to seperate channels. So, I guess this is actually less power to each driver than an EP1500 in mono would be to a single. And, I've haven't had a problem.- Bottom
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The QSCs and their Behringer clones have extensive protection circuits. The amp won't blow up or blow a fuse or anything nasty like that. It will simply shut down for a while if it gets too hot or draws too much current or whatever. Highly unlikely to ever happen in a home environment; these things are meant to power rock concerts.- Bottom
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About the "false adverstising" QSC makes it quite clear in their manuals that the amps can't run at full power at 2 ohms for extended periods of time without tripping the thermal protection circuits. But that's no big; as they show in the specs, an amp running at 1/8th continuous power on music material will be clipping occasionally and there's no reason we would want to push an amp any harder than that. Who wants to listen to clipped music?- Bottom
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