August 13, 2019: I've had my
Rumble 100 for almost 5 years now. Mainly used for practice, but does a few gigs also.
Daughter borrows it occasionally as a portable PA for some of the activities she organises at the aged-care home. (And yes, she has booked my band to play there on 2 occasions!)
These current models have a great power to weight ratio for us older blokes!
After what I did to it last weekend, I figured it was high time I put my hand up and posted something about it.
I love its sound, but occasionally felt it would be nice to have a tweeter option for a bit of extra brightness like the 200 & 500 models offer.
Did my homework and settled on the Monacor img stage-line HT-30 tweeter. It's a good match from an efficiency and crossover frequency point of view, and one of only a few that would fit in the limited space in the top RH corner of the baffle. Even then I still had to make a flared hole and mount it behind the baffle for a neat fit.
The woofer rollof occurs just below 5kHz, so sticking with Monacor's recommended crossover frequency and slope (5kHz & 12dB/octave) are pretty much ideal. That made crossover design easy and did not require an LP filter on the woofer.
I took the signal from the woofer terminals so didn't need to open up the electronics section. The crossover was built on a solder-tag strip and I installed a recessed IN/OUT switch on the baffle as well.
Efficiency turned out to be a bit higher than the woofer, as you'd probably expect, so after initial testing I added a 5dB L-pad that brought it into line very nicely.
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