I have wanted to get something smaller and more portable for some time now. I recently was able to pick up Rumble 100 V3 at a steal off Craigslist. A guy was moving and desperately needed to sell it. I was trying to find a Rumble 200, but once he dropped the price down to $100, I had to get it!! Mint condition too. Not a scratch on it. The first time I tried it at home, it sounded quite boomy. I figured it could be the room. I later tried it in my band's rehearsal space (also difficult room acoustics), and at a small gig. The room for the small gig was the worst. I had to turn the bass knob all the way down, and it still was too boomy. If I muted a note, there were some serious sub bass overhang still vibrating things. Since then I have been looking for ways to remedy this.
I did a quick search and found that TBer #steve_rolfeca was having similar issues with his Rumble 100, and liked the mods he did to his. I also searched for vaious cab bracing methods. BillFitzmaurice recommends dowel rods bracing cab walls against each other, whereas Greenboy (and many others) favor using rib style bracing. I decided to combine aspects of both. I didn't want to spend a lot of money so I used some scraps I had left over from putting in new hardwood floors in my house. They are 3/8" 7 ply prefinished Hickory wood. Very light and strong. Each one functions as a rib (for the top, bottom, and sides), and doubles as a brace from the back to the front baffle. I figured this would save on weight and function well.
This is how the inside of the cab looks after taking the speaker out
Here is after istalling the braces.
I haven't had a chance to try it yet. I am also considering some kind of foam treatment, and possibly plugging the ports, but I want to try one mod at a time so I can distinguish what each mod is doing for the sound.
Another thing I was considering is using a 4ohm speaker or modding it to include an ext cab jack. Does anyone know if the amp in the 100 V3 is stable down to 4ohms?? I assume that if it is, that would take it to approximately 150 watts. running an 8 ohm 12" ext cab would probably be great on one of these. Please let me know if anyone on here has tried either one.
I give an update on the bracing once I've tested this