Potential Mesa Reissues? IIC+ and Dual Rec

banned said:
I have a history of this unfortunately. I sold a Mint condition PRS DGT for something like $1750 in 2018. Most of the used ones in Excellent condition are going for like $2900 on Reverb.
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I got ya beat. I sold a Steinberger GM5T for $800. I’m not going to look up the current price because I’ll have to kick myself.

I also sold my Mk III for like $400 back in 1993 but i hated that thing. Passionately.
 
Yup, I checked Ola’s video again and all the non-pro YT videos about the oscillation issue with the Mark IIC+ Reissue.

No question about it, there’s something extremely fishy about it.

My own thinking is that he must be running the guitar into a modeller or plugin or something.

Those settings would have made the real amp squeal.

Here is video proof from one of our forum members, just look at how low the settings are when it starts to oscillate.



And yes, the lead master is in about the same position.
 
***Waits for demo of 30+ year old amp to confirm it can do the thing it’s done for the last 30+ years***

Tired Bored To Death GIF
 
nightlight said:
Yup, I checked Ola’s video again and all the non-pro YT videos about the oscillation issue with the Mark IIC+ Reissue.

No question about it, there’s something extremely fishy about it.

My own thinking is that he must be running the guitar into a modeller or plugin or something.

Those settings would have made the real amp squeal.
Click to expand...

So, you watch Ola’s vid and see him moving the knobs on the amp and the amp responding to those changes as he’s doing it, for your conspiracy to work, do you think there is someone off camera with a modeler mimicking the same movements Ola made on the amp?
 
DrewJD82 said:
So, you watch Ola’s vid and see him moving the knobs on the amp and the amp responding to those changes as he’s doing it, for your conspiracy to work, do you think there is someone off camera with a modeler mimicking the same movements Ola made on the amp?
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They could have edited it in post… :bag I can’t believe I just made an argument for a MB conspiracy theory!!!!!
 
nightlight said:
Yup, I checked Ola’s video again and all the non-pro YT videos about the oscillation issue with the Mark IIC+ Reissue.

No question about it, there’s something extremely fishy about it.

My own thinking is that he must be running the guitar into a modeller or plugin or something.

Those settings would have made the real amp squeal.

Here is video proof from one of our forum members, just look at how low the settings are when it starts to oscillate.



And yes, the lead master is in about the same position.
Click to expand...


Seems like the issue in NOT happening to all reissues, its a simple as that. Saying that Ola is doing something fishy its not the case when doing the chug videos, guitar is going direct to amp.
 
nightlight said:
Yup, I checked Ola’s video again and all the non-pro YT videos about the oscillation issue with the Mark IIC+ Reissue.

No question about it, there’s something extremely fishy about it.

My own thinking is that he must be running the guitar into a modeller or plugin or something.

Those settings would have made the real amp squeal.

Here is video proof from one of our forum members, just look at how low the settings are when it starts to oscillate.



And yes, the lead master is in about the same position.
Click to expand...

“My own thinking” i.e. “I’m going to accuse someone of being a fraud, because I’m into this conspiracy”.

Not all have issues. Those that feel they do, make a fucking warranty claim. They’ve got 5 year warranties.
 
EOengineer said:
This oscillation issue is IMO more telling of the state of our current production preamp tubes than anything else. It’s an extremely high gain amp and I think a lot of people are encountering one or more microphonic tubes.
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Nah there have been high gain amps made for decades with the same damn tubes without any issues, amps that have several more gain stages than the IIC.

If an amp needs some pricy NOS tubes to not squeel like a pig, then that sounds like either the original circuit is not stable, or there's some issue if it does not occur for every user. To me it sounds like something Mesa should solve, even if it means deviating from the original. To my knowledge Mark V or VII don't have any similar issues.

The only time I've been able to get that sort of issue happening was with an amp absolutely cranked, using long plate preamp tubes that are known to be more prone to microphonics for example.
 
laxu said:
Nah there have been high gain amps made for decades with the same damn tubes without any issues, amps that have several more gain stages than the IIC.

If an amp needs some pricy NOS tubes to not squeel like a pig, then that sounds like either the original circuit is not stable, or there's some issue if it does not occur for every user. To me it sounds like something Mesa should solve, even if it means deviating from the original. To my knowledge Mark V or VII don't have any similar issues.

The only time I've been able to get that sort of issue happening was with an amp absolutely cranked, using long plate preamp tubes that are known to be more prone to microphonics for example.
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Fair enough. Then what’s your theory on why some amps don’t exhibit the symptoms? Natural variation in other components in the circuit? I suppose that’s possible.

The IIC+ in its original form is a borderline unstable circuit. There’s some weird inductance behavior that IIRC is attributed to the circuit boards - I’d need to dig for specifics. Perhaps something changed in this new layout and that formerly controlled behavior is getting amplified.
 
EOengineer said:
Fair enough. Then what’s your theory on why some amps don’t exhibit the symptoms? Natural variation in other components in the circuit? I suppose that’s possible.

The IIC+ in its original form is a borderline unstable circuit. There’s some weird inductance behavior that IIRC is attributed to the circuit boards - I’d need to dig for specifics. Perhaps something changed in this new layout and that formerly controlled behavior is getting amplified.
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Yeah my guess is that it might be borderline unstable, and if enough component variance occurs, whether in tubes or other components, then the issue might manifest. Who knows, maybe even e.g how wires connected to the PCB are arranged can have an effect..something too close to something else etc.

In the video posted earlier in this thread none of those settings seem that extreme, and the way the issue manifests with various different settings means it's likely something other than "just using it with the wrong settings bro".
 
laxu said:
Yeah my guess is that it might be borderline unstable, and if enough component variance occurs, whether in tubes or other components, then the issue might manifest. Who knows, maybe even e.g how wires connected to the PCB are arranged can have an effect..something too close to something else etc.

In the video posted earlier in this thread none of those settings seem that extreme, and the way the issue manifests with various different settings means it's likely something other than "just using it with the wrong settings bro".
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If it’s fairly widespread I’d expect Mesa of days gone by to release a service bulletin and make it right. They seem to have made good on issues with other series - the transatlantic had some problems.

Many of us definitely noted the conservative treble settings in the Gibson videos. They seemed to be running away from that treble knob. I just saw a video showing the pulled lead bright to also trigger oscillation at fairly modest treble and drive settings. That has the potential to be a showstopper for the heavy guys.
 
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