need help with zapco z50c2 amp

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equalizir

Copper - Posts: 71

Joined: February 28, 2003

Location: United States

Posted: March 15, 2003 at 6:45 PM / IP Logged

hi all,i got this amp off ebay a couple weeks ago.its a zapco z50c2 competition amp.its rated at 2x25 into a 4 ohm load.but on the outside of the amp its stable at 1 ohm.i bought the amp to drive one 12 "subwoofer.it also has a button that u can switch from mono to stereo.my question is how should i wire to my sub?should i use the amp to its full capacity and bring it to a 1 ohm load or use it in 4ohm?if anyone can give me advice on how to set this amp up and also recommend a sub for this amp id really appreciate it.thanks in advance

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 15, 2003 at 6:54 PM / IP Logged

In order to tell you how to wire it need to know the model # of the sub. If you want to run it as a sub amp then you would run it in mono. But if you wanted it to run at one ohm you would need a sub that has 2 ohm dvc voice coils.

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 15, 2003 at 7:02 PM / IP Logged

Sorry I stand corrected the lowest it will go bridged is a 2 ohm load so you would need 2 4 ohm dvc coils to make it work. The reason being if you bridge a 2 ohm load the amp will then see it at a 1 ohm. Thus you have a 1 ohm stable amp but the lowest independence you can have is 2ohm X1 channel

equalizir

Copper - Posts: 71

Joined: February 28, 2003

Location: United States

Posted: March 15, 2003 at 7:12 PM / IP Logged

so basically i could get a jl audio 12" with the dual voice coil at 2 ohms?also how do i bridge it?

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 15, 2003 at 8:27 PM / IP Logged

No you would need the Jl D4 with the 4 ohm voice coils . You would wire it in parallel like the bottom diagram here http://www.audiobahninc.com/tech/parallel-parallel-dual-4.gif once it’s bridged your amp will see 1 ohm. This article will explain all about bridging http://www.eatel.net/~amptech/elecdisc/bridging.htm but your amp should have a diagram near the speaker connections.

equalizir

Copper - Posts: 71

Joined: February 28, 2003

Location: United States

Posted: March 15, 2003 at 9:09 PM / IP Logged

it has a diagram where the speaker connections are.it has to two pairs of gold screw connectors.the diagram shows a normal setup but then theres a 3rd channel that shows using the two middle screws to connect the speaker to.im not sure what this means but ill check out the how to on bridging.i appreciate the help.thanks

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 15, 2003 at 9:25 PM / IP Logged

You want the one that uses the two middle screws that will most likely be the bridged mode.

equalizir

Copper - Posts: 71

Joined: February 28, 2003

Location: United States

Posted: March 15, 2003 at 9:56 PM / IP Logged

sweet,thanks man.i appreciate the help

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: March 15, 2003 at 9:58 PM / IP Logged

glad to help if you have any more ?'s you know where to find me

dragonrage

Copper - Posts: 193

Joined: March 15, 2003

Location: United States

Posted: March 15, 2003 at 10:08 PM / IP Logged

bberman: the amp does not "see" a different load. It's simply because the current doubles as well as the voltage. Perhaps you were just trying to give a simple understanding, but that will confuse people more than it'll help. Also, 2 4Ohm DVCs will make 1ohm or 4ohm unless you disregard one of the coils on each. Or maybe you meant just a DVC sub.

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