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Mike and I had this conversation a couple days ago when I was at Mesa. He did a IIC SR—>IIC+/++ SRG conversion for me. The only difference in tone from a IIC—>IIC+ upgrade from a factory IIC+ would be the power transformer (100 vs 105), which is negligible. If you have the export...

@Anxiety Serum ok so you found the blown fuse. My 2 cents, replace the fuse and buy a new quad of tubes from TAD, Tube Amp Doctor. Your old tubes are TAD, so they should have numbers on the base indicating their values. Those numbers will enable TAD to provide you a matched quad which should...

Was there a burnt smell when the amp shut down? If not, you most likely did not fry a screen resistor and just had an output tube go south. The reason why the amp shut down is due to a fuse blowing. They do this to protect the amp. You’ll need to replace the fuse and output tubes. I put a...

Mark IIC+ DRG w/ 105pt all stock down to each component. Pull Treble, Deep and Lead.

Mark III+ DRG No Stripe w/105pt. Pull Treble, Middle, Deep, Lead. GEQ different because I find the III’s a little brighter and tighter compared to the IIC+’s. ***May end up selling this one***

Mark IIC+/++ HRG w/ P100 Pull: Treble Shift, Pull Deep, Pull Lead & Pull Middle for ++. Similar settings to DRG with exception to GEQ.

Mark IIC+/++ DRG w/ 105pt Pull: Treble Shift, Pull Deep, Pull Lead & Pull Middle for ++.

Welcome!

@PurityS.L.G good point. Most Mesa's are biased very cold. The stock bias point on my old Badlander 100 was 15ma. Most EL34 amps run around 34ma. Not sure why it was biased to 15ma, but the tubes lasted long and sounded good.

Calling @UberKrankenschtein …. Seeing that you currently own all these amps, would you care to weigh in on this thread?

@Jimty I spoke with Mike B about this earlier last week. He said there's no such thing as an A/B transitional circuit. There are 2 circuits A & B. As far as those transitional models go, Mesa always used whatever parts they had. Hence the reason you see early Mark IVb's with Mark IVa...

Welcome Klugster, glad to see you made it to Mecca.

And just like that 💨 it’s gone!!!

https://reverb.com/item/73810454-mesa-boogie-dual-rectifier-solo-head-2-channel-100-watt-guitar-amp-head-9-8-1992-sn-r0525?utm_source=rev-ios-app&utm_medium=ios-share&utm_campaign=listing&utm_content=73810454 Rev E - It’s got an offer button. Just saying…

Keep the IV. Sonically, they hold up well for their age and are already starting to jump in value. The VII will drop in value as more used ones pop up. You can always wait and score one cheaper in the not too distant future. In regards to how the IV's stack up in the lineage of Marks, I'd...

@Markedman that CL ad is a scam. I’ve swapped texts with whomever it is. They refuse to talk via phone. They also have 2 other ads out of ATL. One for a VII and another for a No Stripe. The No Stripe pic was lifted from another CL ad.

@narad what Preamp Board version of the IIB is your Coliseum (RP-9C, RP-9A, etc.)?

Best to leave the bear traps flat. Leaving the traps against the glass can be microphonic. Shouldn't be a big problem since the chassis isn't top mounted.

Just sold my Badlander 100. Definitely a cool amp, but it lacked a resonance/depth knob, which may have helped loosen the bottom-end. I found myself always running a 5-band or PEQ in the loop to compensate for this. The clips you posted of the C sound like that bottom end is there, but not as...

@GJgo was that straight into the amp w/ 5881’s or were you hitting the front of it with a boost? Btw sounds direct with no flub. Those G12-75’s are very tempting. Was that a 16 ohm cab?