Rebel 20 - Speaker cab combination and impedance

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UncleNazz

UncleNazz

New member
Hi All,

I'm a brand new member . . .
I bought a Rebel 20 last week from GuitarGuitar in Newcastle England and want to say how blown away I have been. I woke up last Thursday without a thought in my head about buying another amp but a short conversation with a very helpful Dean Curry from the shop and a loud tryout later I had to have it !!! I cannot recommend it highly enough.

Last night I tried it in a rehearsal situation with drums and it was everything I'd hoped for. I have a very loud drummer but it was able to hold its own no problem and the tone was awesome. This was through a Marshall 4x12 at 16 ohms and we were playing Clash, ACDC, Pistols, Van Halen etc.

I play a White LP Custom bought new in 1989 (for £675!! it was a lot then.. )

Now to my question-

I have a 16 ohm 4x12 and also a 2x12 combo which I've wired at 4 ohms to connect to the Rebel's 4 ohm output. They both sound good separately but can I connect both at the same time without causing problems ?

Or do I need to be creative with the series/parallel wiring configuration to end up using just one output from the amp ?


Hope someone can help - I sent a query to info@egnater.com but haven't had a reply yet..

Cheers,,

UncleNazz
 
Welcome,Nazz :) ! Congrats for your new Rebel! I'm sure you'll get a response from Egnater very soon.I don't see why you couldn't connect both cabs at the same time but i would still wait for Egnater's answer ;) I use mine with a 4X12 16ohms,like yours..
 
UncleNazz":2jzjdk6z said:
Hi All,

I'm a brand new member . . .
I bought a Rebel 20 last week from GuitarGuitar in Newcastle England and want to say how blown away I have been. I woke up last Thursday without a thought in my head about buying another amp but a short conversation with a very helpful Dean Curry from the shop and a loud tryout later I had to have it !!! I cannot recommend it highly enough.

Last night I tried it in a rehearsal situation with drums and it was everything I'd hoped for. I have a very loud drummer but it was able to hold its own no problem and the tone was awesome. This was through a Marshall 4x12 at 16 ohms and we were playing Clash, ACDC, Pistols, Van Halen etc.

I play a White LP Custom bought new in 1989 (for £675!! it was a lot then.. )

Now to my question-

I have a 16 ohm 4x12 and also a 2x12 combo which I've wired at 4 ohms to connect to the Rebel's 4 ohm output. They both sound good separately but can I connect both at the same time without causing problems ?

Or do I need to be creative with the series/parallel wiring configuration to end up using just one output from the amp ?


Hope someone can help - I sent a query to info@egnater.com but haven't had a reply yet..

Cheers,,

UncleNazz
Click to expand...

So the Rebel can handle 2 16-ohm cabinets...or 2-8ohm cabinets at the same time. 2-16 ohm cabinets would create a 8 ohm load on the rebel, which would mean you would need to set the impedance switch to 8 ohm. 2-8 ohm cabinets would create a 4 ohm load on the rebel, which would mean you would need to set the impedance switch to 4 ohm.

To get to 4 ohm load on a 2x12 cabinet you would have to be wiring 2 8 ohm speakers in parallel. If you rewired the 2x12 cabinet to series, the 2 8 ohm speakers would create a 16 ohm load.

So...to use both a 2x12 and a 4x12 in this fashion, you would need to rewire the 2x12 to be in series, and then you could run 2-16 ohm cabinets w/ the rebel. You would set the ohm rating to 8 ohm on the rebel in this configuration.

Eric
 
The Rebel 20 has 1x 16 ohm, 1x 8 ohm and 1x 4 ohm output sockets. There is not a selector switch.

My naive question was really whether I could connect the 16 ohm load to the 16 ohm output and the 8 ohm load to the 8 ohm output - at the same time without any grief. I know they both work together as I tried it for a few seconds (couldn't resist)

I have read quite a bit about the subject since posting so feel a bit more clued up - I think I need to make a cable spider :D

Once you Rebel you'll never go back.......

Cheers

U
 
Not sure if you can only use ONE speaker output at a time, but if that is the case, another solution is to make some sort of dual-jack plate for the back of ONE of the cabinets, so that there's an "in" and a "thru", so you can daisy chain the cabs.
 
Cheers,

I think I'll make the combo into 16 ohms and create a way of connecting that and the 4x12 to make 8 ohms....
 
UncleNazz":48d7ym47 said:
Cheers,

I think I'll make the combo into 16 ohms and create a way of connecting that and the 4x12 to make 8 ohms....
Click to expand...
I think this is the best way to do it. Hooking up both the 16 ohms cab and the 4 ohms cab would unevenly load the amp. If the 2x12 is 4 ohms right now, that would lead me to believe that there are two 8 ohms speakers inside and they're wired in parallel, right? If you put those in series then you'll have a 16 ohms cab. Daisy chain that through the 16 ohms 4x12 you have and plug into the 8 ohms output on the amp and you're in business.
 
Gino's solution is the correct one. If your 2x12 has a jack plate you could add a switch that could select between 4 and 16 ohms. Is there a reason you need the 2x12 to be 4 ohms?
 
With my M&B Nomad55 212 combo,i'm connecting 2 cabs (8 ohms+ 16 ohms) at the same time:1 connection for the inside cab (2x12,8ohms) and 1 for the extra cab (Marshall 4x12,16 ohms).There are 3 output sockets,if i remember,4,4 & 8 ohms.It works fine.Anything wrong? :confused:
 
You should be using the 4 ohm taps for that. Product/Sum = 16*8/(16+8) = 5.33 Ohms.
 
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