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PostPosted: Tue Mar 13, 2018 8:02 am 
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I saw a Mark IIC++ coli listed for $6800.00 on eBay and a Mark IIB coli listed on reverb for $2600.00 and wondered if I changed the preamp board from the IIB with a preamp board from a C+ it would that work?

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PostPosted: Tue Mar 13, 2018 9:24 am 
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This sounds like something I would do. Give Mike B. a call. He’s probably done it already.

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PostPosted: Wed Mar 14, 2018 5:58 pm 
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I talked to Mike B. today. He said it can be done.

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PostPosted: Thu Mar 15, 2018 8:04 am 
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What circuit board is in a Studio preamp?

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PostPosted: Fri Mar 16, 2018 4:37 am 
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Mark II

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xdg999 wrote:
I talked to Mike B. today. He said it can be done.


Do Mesa still have spare preamp boards available for the IIC+? I thought they had run out.

Do you know if the IIC+ preamp board for the coliseum is different to the RP-11A or SP-11A boards for Reverb/Non Reverb models respectively? I would imagine it's just the power section that's different obviously but you never know!

Thanks!

Jon


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PostPosted: Fri Mar 16, 2018 6:42 am 
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They don't have any boards left. I asked Mike B. about taking a board out of an existing c+. I also asked him about taking a 105 transformer out of a Mark lll black dot and putting it in one of my upgraded c+'s.

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PostPosted: Fri Mar 16, 2018 10:49 pm 
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Mark III

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Coli C+ preamps are the same respectfully. If you have IIB Cole and a C+ preamp board. You should be able to make the conversion. But getting past Mike's "huh why" look might be another question. More power is the only difference unless you going form 60/100 to Simul-class. Who needs that much power anymore..

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