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Double Bass getting more volume!

I've been using a Workingman 10 with my DB in a jazz quartet (kind of intermediate level ability Baby Boomers), and struggled with hand pain issues off and on. So switched to Rob Allen Mouse EB which I love, still used with the SWR W. 10. But am not getting enough volume in larger rooms (really sound 'barky' and indistinct). I read the thread on Workingman series, and couldn't tell if the AI contra combo would be significantly louder for sure, or to be on the safe side I should get EA cab and head, or ?. I don't like having to play loud, but in even a slightly bigger room I get buried...
 
I don't know "The Best" set up for the Mouse, but I can tell you that the Acoustic Image Clarus (single channel) plus one or two Epifani UL-110's works very well for me. I also have an AI Acoustic Image Contra-EX extension speaker, which sounds awesome with the Mouse / Clarus setup, but it does not feel like it projects like a front-firing speaker does. The new Ten2 speaker probably solved some of that.

There are lot's of opinions on what works best with the Mouse on Talkbass, most of them good. Above all, almost all who have played a Mouse would agree that you have made an excellent choice in getting your hands on one.
 
Perceived volume is a strange thing. If it's all fundamental, it won't develop properly in the room, but the folks next door will have their fillings falling out.

Perceived volume is a function of four elements: 1) the efficiency of the driver as coupled to the cabinet; 2) watts, watts and more clean watts; 3) the frequency spectrum over which the power is distributed, and 4) the room and its resonances either reinforcing or detracting from #s 1-3.

So, for example, you can have a 100 watt head, but if you don't have it coupled to an efficient cabinet, it won't get any louder than a 10-watt head that has the most efficient cabinet there is, an so on.

The best thing to do is research on the efficiency of any particular head and cabinet combo for your application. That's why, even though it is bulky, I still have my 17 year old Carvin 300 head and SWR Triad cabinet. It has the efficiency and the bandwidth with the power necessary to carry any gig I need, from jazz trio on this side of the board to slab high-dB rock-n-roll gigs on the other side of this board, and why I still keep a Marshall 100 watt head for the rare times I play guitar. It's not that I turn it up that loud, but I've tried gigs with smaller combo amps and I have run into the same situation with just not being able to keep up with anything less.