Head keeps rolling off my cab? - Page 2

Jazz Ad · #21 01-28-2013, 03:00 PM

Velcro is your friend.

**Chef** · #22 01-28-2013, 03:01 PM

Velcro isn't gonna hold down a 90lb SVT very well.
Which really shouldn't be vibrating off the cab.

IMO.

joelb79 · #23 01-28-2013, 03:03 PM

I want to see a video.

An auralex grammapad would solve this problem though (between the cab and head).

B-string · #24 01-28-2013, 03:39 PM

Any cab vibrating that bad is wasting large amounts of acoustic energy! That is power that should be providing sound instead of shaking itself.

Downunderwonder · #25 01-28-2013, 04:17 PM

Cab has an undamped resonance which isn't changed by adding 80lb or 20lb. The 80lb isn't as remarkable as one might think, you can lift up a car with a foot powered airbag.

Probably a missing brace.

**mjac28** · #26 01-28-2013, 04:21 PM

And the crowd shouts "video sir"

rockman1 · #27 01-28-2013, 04:38 PM

one word to fix your problem-VELCRO.put a piece under each foot of your amp.i had the same problem with my acoustic 301 cab.that monster 18 inch speaker would rattle any amp off,no matter the weight.it has pockets built into the top so a acoustic amp would fit right in.my problem was a did not have my acoustic 220 head anymore,and the new heads do not line up.so anything i used had to be velcroed.hope this helps,good luck.

Blue_Whistle88 · #28 01-28-2013, 04:42 PM

Try sticking some thick rubber pads on the bottom of the head. Putting an insulator under the cab probably won't do anything because the issue lies in the vibration transfer from the cab to the head. I'm really surprised to hear of this issue with a head THAT massive, but... hey, I guess anything's possible.

Definitely try the rubber feet though because they'll absorb the vibrations. It may be a resonant frequency issue with the cab, but if it's already braced properly there isn't much you can do about that. I guess you could stick a rubber mat on top of the cab, which would allow you to use any head with it and not have the same issue.

4StringShooter · #29 01-28-2013, 04:42 PM

Quote:

Originally Posted by creis2

I never had this problem before until I started using this specific cab.

It's a custom LDS 410 with duratex finish. I have my heavy SVT tube head on top. Tried with my Ashdown ABM head, same thing.

When I play most notes, it doesn't move. When I play C#‎, even at low volumes, the head starts floating off the cab.

Does anyone think there's maybe an issue with the cab?

I tried doing this without the casters on, put the cab on thick carpet, tried a friend's gamma pad. Nothing seems to help.

It not a slight movement, that happens over a set. As soon as I hit that one note, it looks like the head turns into a hovercraft and starts to fly right off.

One word.... : VELCRO !!!

foderaman · #30 01-28-2013, 04:47 PM

I would think this might be your best solution also.Gamma Pad should Isolate the vibration from cab to the Head!?

Quote:

Originally Posted by joelb79

I want to see a video.Might not look pretty though!

An auralex grammapad would solve this problem though (between the cab and head).

Downunderwonder · #31 01-28-2013, 05:05 PM

Quote:

Originally Posted by creis2

I never had this problem before until I started using this specific cab.

It's a custom LDS 410 with duratex finish. I have my heavy SVT tube head on top. Tried with my Ashdown ABM head, same thing.

When I play most notes, it doesn't move. When I play C#‎, even at low volumes, the head starts floating off the cab.

Does anyone think there's maybe an issue with the cab?

I tried doing this without the casters on, put the cab on thick carpet, tried a friend's gamma pad. Nothing seems to help.

It not a slight movement, that happens over a set. As soon as I hit that one note, it looks like the head turns into a hovercraft and starts to fly right off.

gamma pad gramma pad tomato potato

smeet · #32 01-28-2013, 05:15 PM

It definitely sounds like something is wrong with the cabinet. If the head is vibrating, that means the cabinet is flexing a LOT. I've played a lot of very loud gigs with lots of low end, and I've never experienced anything like this, either with my fEARful 15/6/1 (extra bracing added), or any of the many commercial cabinets I have owned.

I also agree you are probably losing a lot of volume when this flexing occurs.

A Gramma pad between cabinet and head should help as a temporary way to protect your amp. But the cabinet is the problem, and needs to be fixed.

augdog · #33 01-28-2013, 05:32 PM

Don't play C# anymore. That note is overrated.

jk

Alex1984 · #34 01-28-2013, 05:37 PM

Wow. I still can't believe an SVT would be able to move like that.

You know the rule: No video, no hovering SVT!

Downunderwonder · #35 01-28-2013, 05:39 PM

Is a gamma pad not the same as Gramma, tried and FAILED already.

B-string · #36 01-28-2013, 05:45 PM

It is better to solve the problem (cab) than to treat the symptom. Yes?

Downunderwonder · #37 01-28-2013, 05:47 PM

Absofreakinlutely.

**Lowactnsatsfctn** · #38 01-28-2013, 06:20 PM

Quote:

Originally Posted by B-string

It is better to solve the problem (cab) than to treat the symptom. Yes?

Too.... Much.... Logic....

smeet · #39 01-28-2013, 06:21 PM

Quote:

Originally Posted by Downunderwonder

Is a gamma pad not the same as Gramma, tried and FAILED already.

Did you put the pad under the cabinet, or on top of the cabinet below the amp?

hover · #40 01-28-2013, 06:28 PM

What I don't understand is the Gramma pad suggestion. I am not discounting the product, but do think it's a band aid as well.

What I think those suggesting it are missing in the bigger picture is the cab should not be displaying this symptom in the first place, and should not warrant an overpriced foam wedge / pad to alleviate it. He paid for a well functioning cab, and that's what should come first.