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PostPosted: Wed Nov 02, 2016 12:13 am 
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Mark I

Joined: Sat Jun 28, 2008 11:26 pm
Posts: 22
Location: Athens, GA
Hi All--
I'm sorry if this topic has been beaten to death here; I searched, but if there are a lot of similar threads I missed, feel free to delete and accept my apologies. I also read the IIC+ guide for dummies, of course.

I was just wondering if there's a generally-held opinion on upgraded IIC+s vs. stock ones. For example, is a great-condition IIC that was upgraded to C+ specs by Mike considered to be indistinguishable from an original (keeping in mind the variance from amp to amp, of course)? Or are there still differences that would make a stock, post 12500 serial more desirable? In other words, is a IIC upgraded to a C+ an ACTUAL C+, soup to nuts, or just the closest approximation that circuit will allow?

Thank you all for your wisdom and insight.

Cheers,
Matt


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PostPosted: Wed Nov 02, 2016 9:56 am 
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Mark IV

Joined: Sat Jul 07, 2007 9:13 pm
Posts: 505
I'm no IIC+ expert, but everything I've read on the topic suggests that there's absolutely no intrinsic flaw in an upgraded amp compared to a factory one.


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PostPosted: Wed Nov 02, 2016 1:02 pm 
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Road King
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Joined: Wed May 18, 2005 2:57 pm
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Location: MIA, NYC, CA
It's the same thing as far as the circuit board goes. However, the transformers on the upgrades will usually be smaller, resulting in a bit more sag, which some people really like for blues. For metal I prefer larger transformers.

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PostPosted: Thu Nov 03, 2016 3:41 am 
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Mark I

Joined: Sat Jun 28, 2008 11:26 pm
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Location: Athens, GA
Excellent. Thanks guys.

Matt


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PostPosted: Wed Nov 23, 2016 6:14 pm 
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Mark III

Joined: Sat Jan 24, 2009 6:22 pm
Posts: 453
This question always gets a great reaction from Mike Bendinelli at Mesa. You can hear him shaking his head over the phone.
Same amp. No difference. It's just people pay more for a non upgrade.
As stated the transformer is the only difference. I have an upgraded DRG with a 100 transformer. They started using 105 in the production C+'s
The 100 is similar to the export tranny in sag.


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PostPosted: Wed Mar 01, 2017 12:25 am 
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Mark III

Joined: Sun Mar 06, 2016 10:38 am
Posts: 240
Location: Western Colorado
I've read all IIC+ are upgraded IICs, the only difference is what year Mike did the mod. :)

Regarding transformers- has anyone ever measured the various depths & corresponded that to the numbers? Looking at photos of various IIC & IIC+ 75 & 100w models it seems to me they're not all the same size. Is bigger better, or is the 105 the king even though it's not the biggest?


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PostPosted: Wed Mar 01, 2017 2:46 pm 
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Donating Member
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Joined: Mon Jan 24, 2005 10:36 pm
Posts: 1463
Location: DC Metro Area
Elpelotero wrote:
It's the same thing as far as the circuit board goes. However, the transformers on the upgrades will usually be smaller, resulting in a bit more sag, which some people really like for blues. For metal I prefer larger transformers.


^This, 100%. It's just a matter of which transformers you prefer. The 105 PT has personally been my favorite, though I have been known to slave it into a Mesa Strategy 400 at times as well... :mrgreen:

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Boogie user of 20+ years, previous owner of 150+ Rectos, author of the previous "2 Channel Recto User Guide" and current "3 Channel Recto User Guide" (if I ever stop being lazy and finish it)...


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