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Mesa Boogie Walkabout Mega-thread Part 10

#4,462
rodl2005 said:
What's causing the speaker to do this..any ideas?
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There is offset somewhere within the power amp (or driver) circuit, and since there is no global feedback, there is no correction for leakage. There are a bunch of things it could be, but a QUALIFIED service tech will be able to resolve it.

Since the OP is on our west coast, it may make sense for it to be serviced at the factory. That's why calling the factory customer service guys will be helpful.
 
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#4,464
mikeswals said:
I'd already had this WA gone through at the factory back in Jan 2018. So I'm just contemplating whether to just part-it out for its blackface cosmetics, or go through repairing it again.
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Give the factory a call and discuss this with Garey in customer service. He will help you figure out the best plan of attack. It might be something really simple too, but I'm not familiar enough with the amp's service history to even guess.
 
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#4,465
agedhorse said:
There is offset somewhere within the power amp (or driver) circuit, and since there is no global feedback, there is no correction for leakage. There are a bunch of things it could be, but a QUALIFIED service tech will be able to resolve it.

Since the OP is on our west coast, it may make sense for it to be serviced at the factory. That's why calling the factory customer service guys will be helpful.
Click to expand...
Hi agedhorse, is the fact that there is no global feednack is the keystone of the sound Mpulse serie? Is this caracteristic who inspire the low damping position on the WD800?
 
#4,466
Leo was right said:
Hi agedhorse, is the fact that there is no global feednack is the keystone of the sound Mpulse serie? Is this caracteristic who inspire the low damping position on the WD800?
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Yes, in part. It's not true of the entire M-Pulse series though, just the walkabout.
 
#4,467
This picture show how irrationnal guitar and bass players can be about their gears, I could sell all this in the adds and buy a nice Subway rig but instead I tend to keep it cause I loooove it. I am an electronic guy and I love to say to my guests this is a tube amp that the final class A tube drive a bunch of MOSFET with no global negative feedback loop, this thing sound good in a conversation...:smug:

This is like a mechanic guy that keep a 1969 Barracuda with 440 Magnum/ six barrels in his garage, he love to talk about it and his guests love to go see this beast.:drool: He could sell it and buy a brand new Tesla but he will not...(now)

Maybe in ten years I will finaly get a WD800 and say to my guests: This the the first design of Agedhorse at Mesa, you know the guy that bring some pro audio concept into bass amp....;)

But by the meantime I say to my guests: this is some Mpulse serie example, it is so tubey it is the last serie that was design on a cathode ray tube computer...:roflmao:

No I am not a real vintage guy, just a little nut about good gear:woot:
 

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#4,468
Leo was right said:
This picture show how irrationnal guitar and bass players can be about their gears, I could sell all this in the adds and buy a nice Subway rig but instead I tend to keep it cause I loooove it. I am an electronic guy and I love to say to my guests this is a tube amp that the final class A tube drive a bunch of MOSFET with no global negative feedback loop, this thing sound good in a conversation...:smug:

This is like a mechanic guy that keep a 1969 Barracuda with 440 Magnum/ six barrels in his garage, he love to talk about it and his guests love to go see this beast.:drool: He could sell it and buy a brand new Tesla but he will not...(now)

Maybe in ten years I will finaly get a WD800 and say to my guests: This the the first design of Agedhorse at Mesa, you know the guy that bring some pro audio concept into bass amp....;)

But by the meantime I say to my guests: this is some Mpulse serie example, it is so tubey it is the last serie that was design on a cathode ray tube computer...:roflmao:

No I am not a real vintage, just a little nut about good gear:woot:
Click to expand...

What am I looking at? A couple of turned off Mesa amps and fender with nothing plugged into them, and a sansamp going into a silver box of some kind
 
#4,469
Luke the Fluke said:
What am I looking at? A couple of turned off Mesa amps and fender with nothing plugged into them, and a sansamp going into a silver box of some kind
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The SansAmp is for playing without the fan noise(acoustic not electric) into my board, the silver box is a 1000 watts Powersoft Class D power amp. There is nothing plugged at the moment the picture was took, the Bassman is the old standby (I'm sentimental) and there is four Rumble cabs but only one on the picture, also not show, a Traynor DNBH, the last non-class D Traynor did.
 
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#4,470
Leo was right said:
The SansAmp is for playing without the fan noise into my board, the silver box is a 1000 watts Powersoft Class D power amp. There is nothing plugged at the moment the picture was took, the Bassman is the old standby (I'm sentimental) and there is Four rumble cabs but only one on the picture, also not show, a Traynor DNBH, the last non-class D Traynor did.
Click to expand...
utterly OT but a digimod module or something else?
 
#4,472
Ok after that slight detour... a walkabout question ... if I have a cab designed to be full range flat response ... and feed a amp modelling pedal into the effects return on the Walkabout - at not Gig volumes - how well will the Walkabout do at giving me a reasonable reference of what the pedal will sound like into the PA? (A lot of my gigs are no backline)
 
#4,474
Thanks!

I was tying myself in mental knots with a “Oh no the Walkabout isn’t going to be powerful enough for this cab”
Then realised it won’t be much less sensitive than the scout cab (but sound v different) and i never have needed to use much of the WAs power anyway so I’ll probably get by ok.
If I do need more power I’ll eithrr get another amp, or the fun option, build another cab!

(OT It’s a design some guys on another forum have designed based a 60l ish cab around a Faital 12pr320 and a Celestion CDX1-1425 horn - while something like greenboys fearful are great for DIY designs, those eminence drivers sure aren’t cheap in the EU compared to Faital and Beyma et al)
 
#4,475
As a devoted owner/player of 2 Walkabout heads who hopes to keep playing them for years to come, how concerned should I be about service/ availability of parts going forward? I just acquired an early blackface version and already have a silver/black one which was updated. I have seen agedhorse post that some parts can become unavailable over time......and am looking to get an idea of if/how/when that's likely to affect this particular head.
 
#4,479
HotelX said:
How important is it to have the WA updated? I’ve got an old silver face that likely needs an update. I’m still using it fairly regularly at gigs driving a barefaced cab. Been fairly reliable through the years.
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If you're running it per manufacturer recommendations (at 4 or 8 Ohms) and it's been solid I'd leave well enough alone. FYI some of the updates include changing the separate active/passive inputs to a single input with a toggle switch, adding a defeat toggle for the FX loop, venting the top cover......if it starts to make any weird noises, 2 simple DIY fixes that often work are 1)spray some DeOxit on a 1/4" plug and ream the FX send/return holes with it 2)swap the tubes.
 
#4,480
HotelX said:
How important is it to have the WA updated? I’ve got an old silver face that likely needs an update. I’m still using it fairly regularly at gigs driving a barefaced cab. Been fairly reliable through the years.
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Generally they are pretty reliable, but you can always call customer service and they can look up the serial number to see where in the revision level your amp falls.
 

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