Question about Volfenhag ZX-4712 Car Subwoofer

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Whats is the perfect amp?

I was wonder what is the perfect amp for my 2 zx-4712?

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Re: whats is the perfect amp?

I have 2 of these 12" running in a Large slot ported box with an:
"Ultra Linear UL2402"
600RMS X 2 @ 4Ohm (Stereo) 1200RMS X 2 @ 2Ohm (Stereo) 2400RMS X 1 @ 2Ohm (Mono)
Can be run in Tri-mode with 3 8Ohm subs, which these subs are. I have not tried this mode. This is
600RMS X 2 @ 4Ohm = Max RMS of your subs. You should run the max of your subs, less wear on the amp you are using , and i doubt you will ever need to turn it up far before it blows out your trunk or window :P
1200RMS X 2 @ 2Ohm = Blown Subs!
Has 4 x 25amp fuses, most will tell you this only has an RMS of around 845, an "ultra linear circuit" produces twice the output power over Modern amps.
Can had on Ebay for around $100. I bought mine for $101.
This Amp pounds, i could quickly tell a difference going from 300RMS X 2 @ 4Ohm with a Kenwood amp. I Had to turn all my settings down on the new amp to have a better balance in sound.

Posted on Dec 21, 2009

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Re: whats is the perfect amp?

No amp. is perfect.If you got money go with the pheonix gold series.Economical amp i'll look at soundsteam alos known as spl.I had 1 very cheap and reliable.hi-phonics is alsso a good amp.

Posted on Jan 29, 2008

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I would use 10 to 12 gauge wiring. As fare as your amp's fuse...Check to make sure you are using the correct amp fuse. Make sure your subs are wired to a ohm load your amp is stable with. Check your ground and positive connections. Check and make sure your amp's gain settings are correctly set. Your amp's gain should not be turned all the way up.

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I need to know how many ohms this speaker should measure on my digital volt/ohm meter, i'm getting 2.1 and 2.4 ohms.

You speaker is dual coil one. Each coil have an impedance of 4 ohms. When these coils are connected in parallel then the ohms will be 2 ohms and in serial it will be 8 ohms. slight variations will show in digital multimeter when you measure the ohms. use the lovest ohms range in you meter to measure the coil impedance.

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How do you repair the voice coils in the subwoofers?

if it is just one of the coil wires that have disconnected then you can try resoldering them but if its the actual coil then your out of luck. you should take it to a speaker repair specialist so they can rewind it. or just trash it and but another sub.

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How to wire the dual voicecoil

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Wiring solution

It's usually called wiring the woofer in parallel. Another "avenue" if you wanted to would be to run the coils to two different amps. In most cases, this is done in SPL competitions. It's not needed for normal wear and tear. Parallel is when you basically combine the two voice coils into one input. The thing you have to watch out for is your ohm load on the amp. if you go lower than what the amp is rated at, it will get hot, and shut down, otherwise known as going into protection. Make sure you're good there, wire in parallel if you want, and let her bump.

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best way is to just run the volfenhag with a set of wires for 2 channells(one set per coil) left and right @ 4 ohms per channell. The CVRs you can parallel the coils(2 ohms) and run a set from each sub to the amp in stereo left and right. This will give the kickers a little more juice than the 12 but should be fine.

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1 Answer

If you have an amp thats mono block with 1 channel but two positives and two negatives what is the best way to hook it up for two 12in.

The fact that there are 2 output terminal sets are simply for convenience. You need to know your amps ratings, but it is probably rated to handle 2 ohms. In this case, (assuming your 2 speakers are single coil 4 oh,s each) just connect them one speaker per set of jacks. (the output terminals are electrically connected inside of the amp, and are the same piece of metal (both the positives are the same, and so are the negatives).
By connecting your 2 subs in this manner, your amp will be pushing 2 ohms with the power equally divided between the two woofers.

This is the best way to hook up, and will get the most power from your amp.

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well at this point i would say it is both,, the subs fried because your amplifier passed dc [direct current] and fried the voice coils on your subs....return them if they are under warranty,, the amplifier sound like you either operated it beyound its specifications or it has a defective output stage allowing it to pass or leak turned the voice coils into the equivelent of the runners in a toaster oven....when an amp passes dc it is going to do so to whatever speakers you hook to either bring it to a shop to be fixed/ return it to place purchase for exchange or throw it away.....or you will continue to experience the same problems....I am the amp goes into protection when it detects a short...[ the short is produced by the amp and it is detecting its own fault and putting it in to protection after it BURNS up your drivers....

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