I have a Orange CR 120 head. I have been using an Orange PPC212 (closed back) cab. Today I stumbled into a used Orange PPC212-OB cab that was almost free. I want to run the CR120 head through both cabs at once. The head has two output jacks so, do I simply run speaker cables from the head to both cabs or do I run one speaker cable from the head to one cab, and from that cab run a second cable to the other cab? Will either way work? If either way works, is one preferred over the other and why?
Many thanks.
Another ohm compatability question using one head and two cabs
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Another ohm compatability question using one head and two cabs
Last edited by jmb79 on Sun Jul 28, 2019 10:22 am, edited 1 time in total.
Re: Another ohm compatability question
Are both outputs on the CR120 the same impedance? If so either way works. No real benefit one way or the other.jmb79 wrote: ↑Sun Jul 28, 2019 1:39 amI have a Orange CR 120 head. I have been using an Orange PPC212 (closed back) cab. Today I stubbled into a used Orange PPC212-OB cab that was almost free. I want to run the CR120 head through both cabs at once. The head has two output jacks so, do I simply run speaker cables from the head to both cabs or do I run one speaker cable from the head to one cab, and from that cab run a second cable to the other cab? Will either way work? If either way works, is one preferred over the other and why?
Many thanks.
Re: Another ohm compatability question
The two speaker outputs have the following written below them:
"1 x 8 ohms or 1 x 16 ohms or 2 x 16 ohms (minimum total impedance 8 ohms) speaker outputs are wired in parallel"
"1 x 8 ohms or 1 x 16 ohms or 2 x 16 ohms (minimum total impedance 8 ohms) speaker outputs are wired in parallel"
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- Tiny Terror
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Re: Another ohm compatability question
If both cabs are 16 ohm, you can plug them into the outputs marked '8 ohms'. If both cabs are 8 ohms, you can't do this, but you could either buy or make a 'parallel box' to run the two 8 ohm cabs at 16 ohms.
Re: Another ohm compatability question using one head and two cabs
Both cabs are 16 ohms. It would seem that since the amp reads "2 x 16 ohms" I should be ok. Why do you say both cabs can be 8 ohms when the back of the amp doesn't provide for that option?
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- Tiny Terror
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Re: Another ohm compatability question
You would need a "series box" to run two 8 ohm cabs at 16 ohms.northernguitarguy wrote: ↑Sun Jul 28, 2019 12:25 pmIf both cabs are 8 ohms, you can't do this, but you could either buy or make a 'parallel box' to run the two 8 ohm cabs at 16 ohms.
Mr. Mustard
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- Tiny Terror
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Re: Another ohm compatability question
Oops. Yup, they would need to be run in series.Mr Mustard wrote: ↑Sun Jul 28, 2019 2:19 pmYou would need a "series box" to run two 8 ohm cabs at 16 ohms.northernguitarguy wrote: ↑Sun Jul 28, 2019 12:25 pmIf both cabs are 8 ohms, you can't do this, but you could either buy or make a 'parallel box' to run the two 8 ohm cabs at 16 ohms.
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- Tiny Terror
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Re: Another ohm compatability question using one head and two cabs
I didn't. I said you couldn't run two 8 ohm cabs, unless you run them in series (I goofed and said 'parallel'). Just plug a 16 ohm cab each in the 8 ohm outputs and rock out.
Re: Another ohm compatability question using one head and two cabs
I think you're confusing him by saying "the two 8ohm outputs" the CR120 doesn't have 8ohm outputs like some of the other amps do. It just has 2 outputs total and (at least in images online) they're both labeled 16 ohms.northernguitarguy wrote: ↑Sun Jul 28, 2019 10:54 pmI didn't. I said you couldn't run two 8 ohm cabs, unless you run them in series (I goofed and said 'parallel'). Just plug a 16 ohm cab each in the 8 ohm outputs and rock out.
jmb79, plug each cab into the head and you should be fine.
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- Tiny Terror
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Re: Another ohm compatability question using one head and two cabs
Or, getting back to your original question, you can also run one speaker cable from the head to one cab, and from that cab run a second cable to the other cab. Either way will work the same.
Mr. Mustard
Re: Another ohm compatability question using one head and two cabs
Thanks everyone for all the help. I've managed to not damage anything and the two different cabs sound really good together.
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- Tiny Terror
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Re: Another ohm compatability question using one head and two cabs
Oops again! Sorry to OP for any confusion on my part. I'm glad you got this all working!Phlowen wrote: ↑Tue Jul 30, 2019 6:52 pmI think you're confusing him by saying "the two 8ohm outputs" the CR120 doesn't have 8ohm outputs like some of the other amps do. It just has 2 outputs total and (at least in images online) they're both labeled 16 ohms.
jmb79, plug each cab into the head and you should be fine.
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