Hi Nico,
Sure, 300b should work nicely on Alp12. Combining Alp12 with Alpha 15's on O/B should be nice. The Alpha's have a +10dB peak from 1kHz to 2kHz. I recommend filtering this out as much as possible, and experiment with a cross around 200Hz.
Cheers
Mark.
Yes. And even if that wasn't the case, with the filter you'll have better midrange/top
dave
this is the challenger ! my hops is that work fine at lower volume....
Dave is 100% right!! but this can apply at all FR...Dave can you test on the fly ??
for 150€ each need to do same work!!
I not like the idea to put a cheaper 80/90µ caps in series... my is 200mm with qts of 0.8 93db work fantastic ,but the A12 is quite low , the tube amp lift a bit 0.4/0.5?
manu
Dave is 100% right!! but this can apply at all FR...Dave can you test on the fly ??
for 150€ each need to do same work!!
I not like the idea to put a cheaper 80/90µ caps in series... my is 200mm with qts of 0.8 93db work fantastic ,but the A12 is quite low , the tube amp lift a bit 0.4/0.5?
manu
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Norman ,cutting at 200hz the A7 and A10.2 can do the job and is a two way design with big xover ,sure work fine as Mjk do... but I try do FR +help
there is some A12 ob around , no one want try without filter ?? need beta tester
here the A7 without filter plus tube http://www.diyaudio.com/forums/full-range/182782-alpair-7-revisited-review.html
there is some A12 ob around , no one want try without filter ?? need beta tester
here the A7 without filter plus tube http://www.diyaudio.com/forums/full-range/182782-alpair-7-revisited-review.html
Like to resurrect this thread if I may. I have currently OB's with a pair of 15" Alphas and a B200 per side, driven actively via a DCX2496. I've just purchased from Scott a pair of Alpair 12's, which I'm hoping should be a straight swap for the B200's, given I'm crossing over at 200Hz. what's the panel think?
An A12 wouldn't be able to handle an OB without helper woofer like the B200 can, but with bass support A12 should get better DDR, more even response, and more extended top end. Your B200 already have phase plugs so dispersion at the top should be similar. And, given my last set of B200 measures, about the same efficiency.
dave
dave
Hello!
I'm currently playing with the OB's of TB W8-1808 + Alpha 15A and I have liked very much of the sound. I got an idea to built same kind of OB's with Alpair 12 elements. Do I get any advantage (or disadvantage) by using Alpairs insted of Tb?
Currently I have 1.st order filter for TB at around 450-500 hz, and 2nd order filter for Alphas at around 130-150 hz. They seem to be working very well together. I have also L.pad controller for TB in order to match the levels seamlesly. Should they work also with Alpairs?
I'm currently playing with the OB's of TB W8-1808 + Alpha 15A and I have liked very much of the sound. I got an idea to built same kind of OB's with Alpair 12 elements. Do I get any advantage (or disadvantage) by using Alpairs insted of Tb?
Currently I have 1.st order filter for TB at around 450-500 hz, and 2nd order filter for Alphas at around 130-150 hz. They seem to be working very well together. I have also L.pad controller for TB in order to match the levels seamlesly. Should they work also with Alpairs?
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