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An ohmy question


Raskolnikovs axe

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Posted

So i'm trying to help my bassist put together a rig - a 4x10 and a head - and I just got an 8 ohm Avatar 4x10 on eBay. Question is, most of the bass heads I'm finding are 2 or 4 ohm. The Avatar has 2 inputs - is there any way to rewire or hook it up to a 4 ohm head so that it will work?

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Posted

 

Originally posted by Raskolnikovs axe

So i'm trying to help my bassist put together a rig - a 4x10 and a head - and I just got an 8 ohm Avatar 4x10 on eBay. Question is, most of the bass heads I'm finding are 2 or 4 ohm. The Avatar has 2 inputs - is there any way to rewire or hook it up to a 4 ohm head so that it will work?

 

 

With a solid state head, the ohms rating is just a minimum. An 8 ohm cab will work fine.

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Posted

Bass heads with 2 or 4 ohm are usually the minimum (2 is pretty rare by the way).

 

8 ohms should be fine through any amp.

 

Rewiring? I've got no idea. But I do know that if you wire it together with another 8 ohm cab you will have two cabs running at 4 ohms.

 

Yo.

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Will I still get enough volume out of it? I'm asking because on one head I'm looking at ( a peavey Mark VI ) it says 400 watts at 2 ohms, 250 watts at 4 ohms, so I'm assuming going up to 8 ohms would reduce the wattage even more. We're a fairly loud rock band so a decent amount of volume will be needed. Thanks for the help!

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Posted

It's OK to run the setup the way that it is. You can run an 8ohm cabinet with a 4ohm head, just not the opposite. If you run too low an impedence, that's when you end up with problems. IE: 8ohm head to a 4ohm cabinet.

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Posted

 

Originally posted by Raskolnikovs axe

Will I still get enough volume out of it? I'm asking because on one head I'm looking at ( a peavey Mark VI ) it says 400 watts at 2 ohms, 250 watts at 4 ohms, so I'm assuming going up to 8 ohms would reduce the wattage even more. We're a fairly loud rock band so a decent amount of volume will be needed. Thanks for the help!

 

 

The volume difference will just be a little noticable, not extreme.

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Posted

Tube amps can't automatically switch impedances like solid state amps can. Most tube amps have a 4 ohm and an 8 ohm output which need to be used for the respective cabs/cab combinations. I don't know the specific electronic details, but that's the case. But since you got a solid state head you don't need to worry about that.

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