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Mike Bungo

8ohm to 4ohm rewire??????

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Hi everyone

I'm after a bit of advice.....

I have a Trace Elliot Elf which is just fab and I believe it's rated 130 watts @ 8ohm and 200 watts @ 4ohm 

I also have a TC Electronic RS210c 400 watt @ 8ohm

It is possible or wise to rewire the 210 as a 4 ohm cab so that I' m getting the most out of my ELF or would this damage the amp???

Thanks in advance

Mike :) 

elf.JPG

rs210.JPG

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I am sure a grownup will be along shortly.  In the interim, I have also pursued this dream in the past, only to be told variations on :

"It cannot be done.  Additionally, it is pointless because even if your amp doubled it's wattage output going from 8 ohms to 4 ohms it would only get you an increase of +3db."

Never quite got that but there you go.  

PS love the colour and cuteness of these little guys.  You just want to pinch their chubby little cheeks.

 

Edited by lownote12
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31 minutes ago, lownote12 said:

It cannot be done.  Additionally, it is pointless because even if your amp doubled it's wattage output going from 8 ohms to 4 ohms it would only get you an increase of +3db.

 

 

Not necessarily pointless, especially if you have a particularly anemic amp where even 3dB helps. But what you're  going to get is not all that much, and the difference between 130w and 200w isn't even 3dB.

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The only way to drop to 4 ohms would be:

a) rewrite the cabinet to only use one speaker - giving a 200W can at 4 ohms or

b) buy another identical cab and uses magic lead to run them in parallel.

 

I (along with most other BCers would opt for more cabs) 😎

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2 minutes ago, paul_5 said:

The only way to drop to 4 ohms would be:

a) rewrite the cabinet to only use one speaker - giving a 200W can at 4 ohms or

b) buy another identical cab and uses magic lead to run them in parallel.

 

I (along with most other BCers would opt for more cabs) 😎

Thanks Paul

 

I do have an RS112 so I can do that but was just wanting to stay really compact for travelling :)

 

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No

Because:

There are only two ways to wire two speakers. In parallel or in series. In series the total resistance is = R1 + R2  - if these speakers are the same that is 2 x R. in parallel the total resistance is total = 1 / (1 / R1 + 1/R2) - if the speakers are the same that is R / 2

So if they are wired in series, the individual speakers would have to be half the total resistance, so 2 x 4 ohm speakers, so rewiring them in parallel would give you a 2 ohm output. If they were wired in parallel they would need to be double the total, so 2 x 16 ohm speakers, so wiring them in series would give you a 32 ohm output. I am guessing the former.

 

 

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Just now, Woodinblack said:

No

Because:

There are only two ways to wire two speakers. In parallel or in series. In series the total resistance is = R1 + R2  - if these speakers are the same that is 2 x R. in parallel the total resistance is total = 1 / (1 / R1 + 1/R2) - if the speakers are the same that is R / 2

So if they are wired in series, the individual speakers would have to be half the total resistance, so 2 x 4 ohm speakers, so rewiring them in parallel would give you a 2 ohm output. If they were wired in parallel they would need to be double the total, so 2 x 16 ohm speakers, so wiring them in series would give you a 32 ohm output. I am guessing the former.

 

 

Thank you :)

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An interesting way to connect speakers on a stereo system is normal left and right channels but also have a third speaker and connect both +ves to the terminals and you will hear the difference signal. Any common signal will cancel.

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1 minute ago, grandad said:

An interesting way to connect speakers on a stereo system is normal left and right channels but also have a third speaker and connect both +ves to the terminals and you will hear the difference signal. Any common signal will cancel.

Not if it is a valve stereo system!

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