I've posted a DIY thread on this cab, but I love the tone and power of this little 210 cab so much that I'm going to build another just like it so I can use one for small gigs and both for larger gigs.
I've had these BP102's lying around for a long time, always trying to find the right way to use them but never being happy with anything. Then after following all the fEarful threads I started experimenting with dedicated midrange speakers. Wow, what a difference adding a 6" midrange did to complete the sound of the BP102's.
BP102's are powerful little 10's but they start dipping above 500Hz, which one would expect from a 10" speaker that handles the low end like these do. For a 10" they have a pretty decent xmax of 6.2mm and they can take gobs of power without farting out (rated at 200 watts each).
I built this little 210 cab (20"X20"X16") and added a 6" midrange (swiped from an assortment of stereo speakers I had lying around). After some experimentation in it's own little box, I found a good sealed cab size for the compartment within the 210. I use a Carvin BX1200 and bi-amp, crossing over anywhere from 500Hz to 800Hz. 700-800Hz seems to give the most pleasing results.
Because my BX1200 is a dual monoblock head with it's own crossover and separate output controls, I'm going to build a second 210/6 just like this one and run the 6's off one side and the two 210's off the other (as I do running one cab bi-amped now).
The closest comparison I can make to a commercial cab would be an Acme Low B. While I've never owned or even played through one, just knowing the cab volume of the Acme and that it is a three-way design, and from reading others comments on it...my little 210/6 cab seems very similar. The BP102's are probably the closest available tens I'm going to find to the OEM's Acme uses.
I can dump gobs of power into this cab. Having just played a gig that no other 210 I've had would have handled on it's own, I really cranked the hell out of my amp and the BP102's did not fart out and handled my low B very well. It was pretty high volume with more lows than I normally push and this 210/6 cab handled the whole gig far better than I imagined it would. I had my mini 215 cab (a very loud cab) along if I needed it, but I never did. Of course at the size this cab is, it won't produce thunderous fundamentals, but it gives some serious low end output at the harmonics where it feels deep. Yet, thanks to the dedicated midrange 6" driver the mids and highs sound so clear and smooth, without the harshness of a full range/tweeter configuration.
At the small size and 40 lbs. it's an easy to haul cab. The BP102's themselves weigh more than the empty cab does (cab is 1/2" ply, braced)! If anyone wants to use BP102's, matching them up with a dedicated 6" midrange will make the most use of them and provide one of the smallest, powerful little cabs that also have great clarity and thick low end you could want. I was not a big fan of 10's until I paired the BP102's up with the 6" midrange.
For a 10" speaker, the BP102's are really quite amazing for low end. They just need a midrange speaker to fill out the sound.
