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Rumble 200 turned out to be eggshell fragile

Well this is too bad. I would have like to have seen a pic of what this kind of freek damaged looked like. It's just fun to look at stuff that you'd never think could happen then try to reverse analyze what actually happened.

The "eggshell fragile" doesn't seem to have any evidence here just anecdotes.

Crown did a video drop test their amps a while back:

Their newer amps would probably do even better. Lighter weight and other engineering applied.
 
The point of the thread was not who thinks Fender shouldn't be questioned, or whether or not the amp is fixable. The point was "I am doing a little frankenrig building with the help of some friends. Whaddya think?" That's it.
That's clearly not the point of your thread title...
 
My experience in supporting service departments globally is that what's described often doesn't match reality. Happens all the time. Everybody has an agenda, this appears to be no different.
I wouldn't say agenda as that's loaded language, but I get your point. I used to work as a project engineer for a manufacturer of towing and recovery equipment. Almost every single broken or bent underlift was accompanied with "I was only lifting a VW Beetle." We used to joke about putting a no-Beetle clause in our warranty because apparently, lifting one axle of a 1,500 pound VW Beetle will break a 6,000 lb or 8,000 lb underlift damned near every time it's tried.
 
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Dunno why I feel like i've been told off by someone I was trying to help. I must try to stop trying to help the hopeless lol. Live and learn as they say.

Op, I am sorry you experienced a catastrophic failure of you Rumble 200. I am glad that you were able to determine what happened. This will make it less likely that anything like that will happen again. That's all anybody here on the thread wanted.

Good luck with your frankenamp. When it's done, WE WANT PICTURES!
 
Build an ultra-light 212 combo with a head that will dish at least 800w at 4ohms with an extension cab, and you will win the amp combo war.,............. GK came closer, but no extension cab option.

You can get the powered MBP212 II and that is your 500 watt extension cab. It's not cheap, but it's an easy 2-hand carry, 1000 watt 4x12 combo stack. I have the MB212 II. It is truly an incredible combo. The best I've used so far.
 
I already addressed the title of the thread being hyperbole. As it got further pulled apart, despite the slight cosmetic damage, the blow was obviously far more severe, which I also shared here. From there I've been told that two respected pros are too lazy/dumb/snotty to see what they are seeing with their own eyes.

I agree the MB212 is a great little combo, I just don't understand why they would build it so it required a powered cab as an extension.

Progress report:
frankenrumble.jpg



I'm calling it the Grumble 115-6.0

Stock speaker is heavy, surprisingly so considering how nicely light the Rumble 200 is, around 17lbs. If I swap that for a KappaLite 3015, which I already have in another cab, I can lose almost 10lbs! That option would definitely require some cab tuning etc., but I'm willing to muck with this for a bit and see what we can get out of it.
 
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I already addressed the title of the thread being hyperbole. As it got further pulled apart, despite the slight cosmetic damage, the blow was obviously far more severe, which I also shared here. From there I've been told that two respected pros are too lazy/dumb/snotty to see what they are seeing with their own eyes.

I agree the MB212 is a great little combo, I just don't understand why they would build it so it required a powered cab as an extension.

Progress report:
View attachment 3421433


I'm calling it the Grumble 115-6.0

Stock speaker is heavy, surprisingly so considering how nicely light the Rumble 200 is, around 17lbs. If I swap that for a KappaLite 3015, which I already have in another cab, I can lose almost 10lbs! That option would definitely require some cab tuning etc., but I'm willing to muck with this for a bit and see what we can get out of it.

Check it out and see how it sounds with the 3015 in the cab. The 3015 Kappalite is pretty generic. It might not require any tuning to sound good in that cabinet. Lots of bassists love them (once you tame the mids). Now, a 3015LF, that's a different story.
 
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After weighing it, pretty sure it's not a 3015. The KappaLite 3015 only weighs around 8lbs, the stock speaker is more than double that. Here are the only markings on the speaker.
 

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Sorry for the flood in your notices if you have this tagged for following, lol. Here is a pic of the head opened up, and you can see the curve in the board. Obviously far more of an impact was applied than the external damage let on. As for where exactly the fatal board damage lies, I can't say. I will take some more pics when I get it back. Don't want to waste Rolland's time mucking with the dead thing any further.
frankenrumbleopen.jpg
 
After weighing it, pretty sure it's not a 3015. The KappaLite 3015 only weighs around 8lbs, the stock speaker is more than double that. Here are the only markings on the speaker.

Sorry, I wasn't very clear. I edited the message to fix it after I read it over but it was obviously too late.

I thought the Kappalite 3015 might sound okay in the Rumble box. You never know. Since you already have a sweep on the 3015 in that box, you can alter the tuning of the ports if you want to and see what you can do. Maybe one of your tech friends can do an impedance sweep. That should be useful for your tuning. Should be a great set up when your done.
 
After weighing it, pretty sure it's not a 3015. The KappaLite 3015 only weighs around 8lbs, the stock speaker is more than double that. Here are the only markings on the speaker.
I'm positive it's not even close. That's an Eminence OEM part, not even remotely related to the KappaLite 3015 in any way.
 
Sorry for the flood in your notices if you have this tagged for following, lol. Here is a pic of the head opened up, and you can see the curve in the board. Obviously far more of an impact was applied than the external damage let on. As for where exactly the fatal board damage lies, I can't say. I will take some more pics when I get it back. Don't want to waste Rolland's time mucking with the dead thing any further.View attachment 3421525
That's an FR-4 type board, that much of a bend over that distance isn't going to bother it one bit. There's more to this story I'm sure.
 
I already addressed the title of the thread being hyperbole. As it got further pulled apart, despite the slight cosmetic damage, the blow was obviously far more severe, which I also shared here. From there I've been told that two respected pros are too lazy/dumb/snotty to see what they are seeing with their own eyes.

I agree the MB212 is a great little combo, I just don't understand why they would build it so it required a powered cab as an extension.

Progress report:
View attachment 3421433


I'm calling it the Grumble 115-6.0

Stock speaker is heavy, surprisingly so considering how nicely light the Rumble 200 is, around 17lbs. If I swap that for a KappaLite 3015, which I already have in another cab, I can lose almost 10lbs! That option would definitely require some cab tuning etc., but I'm willing to muck with this for a bit and see what we can get out of it.
I think you should put the Kapalite speaker in a cabinet by itself and re-install the factory Fender 15 so you have the extra power when needed. Unless the factory one isn't in good condition.
 
I agree the MB212 is a great little combo, I just don't understand why they would build it so it required a powered cab as an extension.
I pondered that question, since I just recommended a MB112 combo to a friend. I think the tradeoff is that they can use a 4-Ohm internal speaker and get a bit more power for the stand-alone amp, at the expense of not being able to support an extension. It also gives them complete control over the load characteristics. The decision could rest on having a sense of how many players who are in the market for that amp, will ever actually use an extension speaker.
 
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That's an FR-4 type board, that much of a bend over that distance isn't going to bother it one bit. There's more to this story I'm sure.

Could this bend have effected the coupling between the pre and power stages? I had an old ADA bi-amp rig that had a bunch of little hard connections in it that were always breaking. (hated that thing) Rolland said it appears it is only the pre amp that isn't working, but he did not pull it all the way apart as Mike did.