I want to change my goliath III 8 ohm to a 4 ohm without changing speakers

[manfredbass]

I want to change my goliath III 8 ohm to a 4 ohm without changing speakers. A diagram would be handy

[Gruuve]

Originally posted by manfredbass:

I want to change my goliath III 8 ohm to a 4 ohm without changing speakers. A diagram would be handy

The only way I know of to do this is to change the speakers, unfortunately. You could rewire it completely in parallel to a 1 ohm load, but I don't know of any amps that will drive that low of a load, plus you'd have to also replace the crossover with one that is custom-made to work with a 1-ohm load.

 

I'd assume you want it to be 4-ohm to use more power from your amp, right? It might be cheaper and less problematic to just get a bigger amp...

[57pbass]

I once owned a Bag End 4 x 10 - 8 ohm cab and had the same request.

Bag End told me they would have to replace all the drivers and the circuitry.

 

I sold that and purchased a 4 ohm Goliath 4 x 10 and it working outvery well..

 

I would contact SWR directly about your request and find out if or how you should proceed.. I dont know what type of impact it will have on the warranty if you blow it up! Good luck

[musicfiend]

Search feeature shows that it's possible

 

http://www.musicplayer.com/cgi-bin/ultimatebb.cgi?/ubb/get_topic/f/5/t/010923.html

 

Edendude let's us know that he rewired his cab from 4 ohm to 16 ohms....

[Big Red 67]

Wire it to one ohm. Then run it with a car audio amp. they go to one. hehehe

[Edendude]

You can't go from 8 ohms to 4 ohms without changing out the drivers on either a 2x10 or a 4x10 cab. If you are going to keep a balanced power distribution among the individual drivers, no conbination of series/parallel wiring will work.

 

Here's a VERY useful 'Impedance Calculator' resource to help you figure out what kind of cab impedance changes you 'can' make by re-configuring your cab's wiring.

 

Just plug in the impedance values of various drivers and the calculator will show you the total impedance values for a multitude of series/parallel wiring configurations, using up to 16 individual drivers.

 

Click here...

 

http://www.colomar.com/Shavano/impedance_proc.php

 

But a word to the wise...

 

Changing the impedance of your cab by reconfiguring the wiring, also moves your crossover point.

 

When I changed my Eden 2x10 over from 4 to 16 ohms, I took the horn and x-over out of the circuit, because the one horn in the other 2x10 cab is plenty enough. So the x-over issue was not an issue I needed to be concerned with.

 

P.S...

 

The really cool thing about that impedance calculator I have given you...

 

It generates a detailed wiring diagram for every possible wiring combination you feed into it. Cool or what?!

[manfredbass]

very useful information. I have never tried a forum before, but I can surely say I am talking with serious professionals. Thanks a lot. I will buy a 15" cabinet, and go break by back all for good tone!!! it surely pays!!!

[Edendude]

The real advantage of forums like these, is that you can benefit from the mistakes others have made in the past.

 

 

Glad to have been of some help to you.