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Re: 15 cvr 4ohm trying to drop to 1 ohm
Are these Dual Voicecoil Subwoofers? Are there 4 terminals on each sub for wires?
If they are Dual 4 ohm voicecoil subwoofers
- connect both + on subwoofer 1
- connect both - on subwoofer 2
- connect both + on subwoofer 2
- connect both - on subwoofer 1
This will give you a 2 ohm STEREO load.
To get a 1 ohm MONO load...
now connect only one of the + on EACH sub to the + on the amplifier.
and the - on EACH sub to the - on the amplifier.
You now have a 1 ohm mono load.
If your speakers are 4ohm single voicecoils (one pair of terminals) the lowest impedence possible is 2 ohms.
This is wired in the same fashion. Both + on the subwoofers to the + on the amp, and both - on the subwoofers to the - on the amp.
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Are your subwoofers wired in series or parallel? Check your connections, if everything is ok, the problem is with your amplifier. It might have a blown capacitor inside or its not really a 1ohm stable amplifier. Have it repaired if thats the case.
CVR series do not have large power handling capabilities. Your subs will melt before the amplifier is used to its full potential. If the subs arent in a ported enclosure - do that. They both handle 500w rms - so the pr1000 is perfect. bass response is all in the enclosure!
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If you have the version with 2 ohm voice coils, you want to use the 2nd diagram for a final load of 4 ohms to the amp. The 1 ohm load is too low for the amp and will cause it to overheat and possibly fail. If you have the 4 ohm version, use the wiring shown in the 3rd diagram which is a perfect match for the amp.
Use the above site for several wiring schematics on dual voice coil speaker hookups. It will show how to wire for different impedance.
Also, I think the CVR 12's come in 2 ohm and 4 ohm impedance. See if you can check yours to determine which you have....
With a single 4ohm DVC sub there are only two possible wiring solutions, parallel the voice coils for a final 2ohm load or series the voice coils for an 8ohm load. In your case, you want to wire them in parallel, both positives and both negatives connected to the amp terminals.
Here are the diagrams: (-) to (-) and then to the amp - (+) to (+) and then to the amp. Impedance = 2ohms.
175W x 2 @ 2 ohms
350W x 1 @ 4 ohm
Your amplifier is not stable @ 2 ohm bridged. So you will have to wire them independantly on each channel.
+/- on sub to +/- on L channel
+/- on sub to +/- on R channel
Wiring the subwoofers in paallel will result in a 2 ohm load, which your amplifier is not rated to do. Doing so will cause heat buildup, and damage to the amplifier.
How you wire it depends on how hard you want drive your amp. If your woofer runs 4ohm per coil I would wile it in series (amp +to sub +1 sub -1to sub +2 amp - to sub -2) then run it for a week and see if it has enough power. the lower your Impedance (the resistance load on the amp) the harder your amp works and more THD (noise) is produced. (Dclass amps aren't know for being clean to begin with) configured like this your amp will see 8ohms and sound the clean east. if this turns out to be not enough power wire it in parallel and double the output. wire amp + to sub +1 and +2 then amp - to sub -1 and -2.
A word to the wise... start with your volume very low and work up slowly most speakers will puk up the voice coil before the amp starts to get warmed up. you would hate to have to buy a new sub.
For best results the output resistance of the amplifier must equal the combined resistance of the speakers. So if the amps says 8 ohms and you have two 4 ohm speakers you put them is series or if the amps says 4ohms and you have two 8 ohm speakers put them in series. If it says 4ohm and you have two 4 ohm speakers best to use only one. It Depends on the output resistance of the amps. It is usually written at the terminals where the speakers are connected.