Jump to content

Please note: You can easily log in to MPN using your Facebook account!

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


Recommended Posts

  • Replies 7
  • Created
  • Last Reply
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... ;)

Old bass players never die, they just buy lighter rigs.

- Tom Capasso, 11/9/2006


Link to comment
Share on other sites

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



Link to comment
Share on other sites

Search feeature shows that it's possible




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

Hiram Bullock thinks I like the band volume too soft (but he plays guitar). Joe Sample thinks I like it way too loud (but he plays piano). -Marcus Miller
Link to comment
Share on other sites

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...




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.




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?!

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...