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In Reply to: RE: Cabinet for Tannoy 12" posted by Douger on June 17, 2014 at 12:48:07
Thank you, Doug, I have been through all of the plans and ideas there, but nothing excites me. Thee are some properly designed cabinets with dimensions and bracing instructions, but they are old designs, typically from the 70's. Firstly, their "short and fat" proportions do not suit my room, and second, they do not suit the low-diffraction, high resolution design that I am looking for. I have already built a pair of high-bandwidth, current feedback power amps which drive the newer Tannoy dual-concentrics extremely well in a bi-amped configuration (tested on S10's and D900's). I have the speakers (Tannoy 12" DC3139's), the cabinet must come next, then I want to make the configuration active.
Follow Ups:
If you go to a tall thin cabinet, you will probably need baffle step compensation.
Dave
Thanks, Dave and agreed - I may well do. But, if Tannoy have been clever in their original cabinet design on the Definition and Dimension range, the compensation point may coincide with the crossover point with the tweeter, effectively eliminating the need for compensation. That would explain the very simple crossover that is used in the D900 compared with, say, the System 12/1200 DMT, which uses the same drivers, and would also explain the improvement in sound over the System 12/1200.
But really, I will not know until I build a cabinet and test it. I do see that Texas Instruments recently published an active crossover design which makes such compensation easy to add, so I am not too concerned about it at the moment.
It sound like you should get a copy of Base Box Pro and design your own cabinet.
Dave
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