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Mesa/Boogie Titan V12 megathread!

#541
If it's in a rack, drill holes on the side of it. It's simpler and more reliable than adding a fan. Also, it will never fail. That's what I did and the amp runs hot but not as hot as what you describe.
I did that for my previous amp that had a thermal shutdown once, it was an Ampeg SVT 4 Pro. Since I drilled those holes, I never had any more issues.
 
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#543
Well, it comes from the back of the amp and mainly flows out on both sides of it. Here's what I did (my APN really suck btw):
DSC_0014.jpg


DSC_0015.jpg
 
#548
baxter_x said:
I'll give a try just to check how it sounds with a new tube. But I'll probably keep the stock tubes anyway.
Does it also have any effect on the clean signal?
Click to expand...

Of course it has effect on clean signal too... I wouldn't change the types of tubes if it were me. As i've checked the signal path --> preamp section of TITAN has a different schematic than other amps. If I am not mistaken, the signal goes directly from preamp tubes to MOSFET-s so there is a big chance that you will do something bad to the power section of the amp (if you will choose any other tubes than the ones currently installed).
If you don't like the "character" of the amp - change the amp. If it sounds broken - change the tubes. If not - let it go. :)
 
#549
Well, I just want to give a try, just to hear how it affects the tone of the amp.
I'll keep the stock tubes and probably put it back in the amp, unless there a "huge" sound improvement.

However I don't see how it could damage in any ways the power section? To me any hybrid amp is the same preamp feeding the power section.
Tell me if I'm wrong
 
#550
baxter_x said:
Well, I just want to give a try, just to hear how it affects the tone of the amp.
I'll keep the stock tubes and probably put it back in the amp, unless there a "huge" sound improvement.

However I don't see how it could damage in any ways the power section? To me any hybrid amp is the same preamp feeding the power section.
Tell me if I'm wrong
Click to expand...

I'm not 100% sure - but as I've spoken with my local repair guy, he told me that this amp has a really really complicated schematic & that the tubes "drive" directly into MOSFET-s (literally - directly). I'm not an electrician so I wouldn't know the details.
 
#553
baxter_x said:
Well... I tried another tube in each slot and I didn't hear any diference at all.
Click to expand...
Mesa sources tubes from a lot of different manufacturers, so it's quite possible that you swapped like for like if you heard no difference. Also, keep in mind that the differences will be somewhat subtle; I swapped all four tubes at one point and found that the high end was a little softer with the Tung Sols that it had been with the Mesa-branded tubes, and overall seemed to have less gain (definitely more noticeable with overdrive than otherwise).

As with all things tone related, your mileage may vary greatly.
 
#555
Did you ever have your amp looked at by an authorized factory service center like I suggested?

Sorry you had a problem, I tried hard to help you but got a lot of push back from you about seeking QUALIFIED help with your amp.
 
#556
agedhorse said:
I tried hard to help you but got a lot of push back from you about seeking QUALIFIED help with your amp.
Click to expand...

I think you are mistaking as I never had any problem before yesterday and never pushed you back. However another user had shutdown problems and was actually pushing you back from seeking qualified help.
Just to say I'm totally open minded to seek qualified help. I actually contacted Mesa a severa weeks ago and they told me if the amp has worked flawlessly since it was built it should still run for a long time without any issues

However the amp was working flawlessly when I came back home. So to me it was just overheating, so the thermal protection kicked in to protect the amp. Which proves the amp works actually fine and as expected. As I mentione dearlier, it's the first time I use the amp in a big venue. That means more power and the amp in direct sunlight.
So I have a simple question: As the amp sits in a rack , should I consider drillinf bigger holes in it?

Here are to pictures of my rack from both sides to give you an idea. According to you, is it enough?
Anyway, thanks for your very valuable inputs.

DSC_0028.jpg


DSC_0029.jpg
 
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#559
Those molded racks with recessed sides do not have adequate clearance to the sides of the amp. There needs to be at least 1-1/4" clearance on each side in order for the fan cooling to work properly. This is a general warning for any amp that has side vents.

I can't say if your problem stems from the rack, if there is a problem with your amp, or if maybe there is a problem with your speakers (such as a replacement driver, wiring change, improper repair, etch). It's not uncommon to see this on "defective" amps that we troubleshoot with a customer.

This is why I encourage engaging a qualified factory service center as they have the experience and knowledge to be able to help you most effectively. Otherwise everything is just a wild ass guess.
 
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#560
Thanks a lot to both of you for you inputs.
I don't have time to bring it to a qualified service center as I play tomorrow. So I'll pull the amp off the rack and see how it goes.
I'm pretty sure the amp is fine as it was very hot when I touched it yesterday. So I'll see tomorrow.
But I'll double check that with a qualified engie soon.

Thanks again
 
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