Mesa D800 rattles off cabinet to oblivion

[modbass]

I have the same issue with my Bergantino rig and had it with my Genz Benz…I use a microfiber cloth under my amp and it never moves.

 

[modalsum]

No clue what the problem is. I have my D-800 cabled to 2 1x15 cabs. I have had that cranked during outdoor gigs. Stupid loud.
Volume past noon.

The head never moved. Never had an issue.

out of curiosity... do you have the cabs stacked or side by side?

 

[Hounddog409]

out of curiosity... do you have the cabs stacked or side by side?

Have done both, depending on stage.

They are either stacked, or separated on each end of stage. Head is always on top.

Last outdoor, they were stacked. And cranked.

 

[agedhorse]

Disagree. The head is walking off the cab because of excessive vibration. The cabs need more bracing front to back and side to side.

I have my homebrew 2x15 and a Fearful 12/6 plus sub cab, and the heads do not move. At all.

Not necessarily.

There comes a point where the lighter weight heads that do not use the soft rubber feet will move around on most cabinets. It's the nature of the beast. The bracing of the cabinets are exactly as the designer (me) intended, YOU may not agree but that's ok... you can start your own company, sell your own "more perfect" designs and prove me wrong. I have my track record, you (presumably) have your own track record?

We no longer use the soft rubber feet because complying with RoHS has removed some of the usual stabilization compounds from the softer rubbers. Without the stabilization compounds the soft rubber can break down and become gummy. With the softer feet the amps don't move, but we can't sell amps with the softer feet anywhere in the EU, so we don't use them.

 

[two fingers]

Yeah I've had my TT800 and Subway 115 CRABKED on all kinds of stages and it's never moved even a tiny bit.

 

[agedhorse]

Yeah I've had my TT800 and Subway 115 CRABKED on all kinds of stages and it's never moved even a tiny bit.

It's also a few pounds heavier which helps a lot. The TT uses the newest foot, a little larger and softer than some of the older feet we used on D-800's and 800+'s, but still not what I would call "soft". This appears to be the rubber formulation that will be the standard for these types of parts going forward as it has passed the necessary aging tests without deterioration. There is nothing worse than cleaning up gooey deteriorated rubber, it sticks to everything!

 

[Bill Murray]

Not necessarily.

There comes a point where the lighter weight heads that do not use the soft rubber feet will move around on most cabinets. It's the nature of the beast. The bracing of the cabinets are exactly as the designer (me) intended, YOU may not agree but that's ok... you can start your own company, sell your own "more perfect" designs and prove me wrong. I have my track record, you (presumably) have your own track record?

We no longer use the soft rubber feet because complying with RoHS has removed some of the usual stabilization compounds from the softer rubbers. Without the stabilization compounds the soft rubber can break down and become gummy. With the softer feet the amps don't move, but we can't sell amps with the softer feet anywhere in the EU, so we don't use them.

The cabs and heads are FLAWLESS.

It's 100% because the head is very lightweight.

All it needs is a little traction/grip and it's a done deal. Very quick, easy, and inexpensive solutions are readily available.

 

[FirewalZ]

well not full oblivion. but almost.

i love my d800 w/ my 2 1x12'' cabs. but i'm two gigs in now with it and literally had to keep an eye on the head as it kept vibrating off my cabinet. a few times i'd have to go midsong in between lines and push it back from the edge. and this is w/ the bass around 1 o'clock, master around 11 o'clock and input at 11 o'clock.

thankfully i had PA support each time, but if i had to push the headroom up in a situation w/o PA i'm afraid the head would fall off really quick

i can't be the only person this is happening to and am thinking a rack is probably the only way to suffice - which kind of defeats the handiness of a small head in a shoulder bag. but wondering if anyone else has any crafty solutions?

Same issue.....this works perfectly;

https://www.amazon.com/gp/product/B000AL8XUI/

 

[DionClassic]

I have to agree with this ... if the cabs are vibrating so madly that the amp drops off the cab, then something is kind of wrong with the cabs ... and it's likely that inadequate bracing is the culprit. I have used my WD800 on hundreds of gigs in the past few years .. generally on top of one or another of my Berg cabs and I've never had an issue. I can even put drinks (however bad an idea that may be) on my rig and they never vibrate off.

Cab vibration issues caused me to operate on a 70's era Fender Fullerton EVM 15 loaded cab. I ended up bracing it front to back, side to side and top to bottom, and it really reduced the overall vibration issue.

I agree totally with this! I remember a while back I got this guitar 212 cab that I used for bass (put bass speakers in it and cut some ports) anyway it was poorly done, and the result was tons of vibration, I've never had a cab before or after that ever vibrated that much during a show. So it could be a bit of both

 

[Kipp Harrington]

I love my Mesa Subway rig. I've had a similar problem. The tool mat works pretty well. This is one area where Fender was ingenious with their recessed ports in the Rumble cabs to hold the amp head securely... even on a 45 degree angle. Great idea!

 

[nnnnnn]

If you find yourself at a gig without a non-slip mat or whatever you do have the option of just putting the head on the floor next to the cabs.

 

[pingvuiini]

I have the same issue with a tiny and light Quilter BB800 sitting on a GR Bass 212 Slim cabinet. It would move but would not fall off, probably because of the aluminum edge of the cabinet. A towel took care of the problem easy. Will eventually get some black shelf liner which will look less obvious. Interestingly, no matter where I placed the head it would always vibrate to the exact same spot, same angle, etc.

 

[Rip Van Dan]

One guy in a Phil Jones Bass thread set metal cups into the top of one his powered cabinets for his head so the amp feet fit into them. Problem solved.

I had sunken cups on my Standel amp back in the early 70's that would fit either the head (very light preamp head), or another 215 powered bass reflex ported cab on top of the first one.

 

[JohnnyBottom]

This...easily trimable...
Evans SoundOff Tom Mute - 14"

 

[fakeneckplate'65]

I use a foam pad in between my Mesa Bass 400+ & my cab. But doesn't rattle off because it weighs 55#.

 

[blastoff]

i put these hardware store rubber feets on pretty much anything i have. i really can't say enough about em.

 

[Spectre Gunner]

Also, check that your Speakon cable or power cord (or both) isn't positioned in a way that they are trying to push your amp off the cab. There are ways to secure the cables as well.

 

[2112]

Sounds like another job for the Minimalist Toolkit: a flathead screwdriver, a pair of vise-grips, and a roll of duct tape. Ain't nothing the Minimalist Toolkit can't fix.

 

[agedhorse]

This has been happening since the introduction of the super lightweight heads. It really doesn't matter which heads or which cabinets either, no matter what the brand. Different manufacturers came up with different solutions.

Over 15 years ago, we developed the Shuttle 3 and 6 series saddle that allows the amp to attach (via thumbscrews) to the cabinet, and the saddles were available separately so the amps could be attached to any cabinet. Just another (more expensive) way to keep a head in place.

 

[juggahnaught]

Logic dictates that if you put the cabs on top of the head, the head won't be able to vibrate off of the cabs. That might be a good backup plan if Pauly 4001's solution doesn't work.