Arnold, In my listening room, I only got horny once in my lifetime, The arm rests of my listening chair was a distraction during the moment...
Out of topic na....
Going back to OBs... In normal circumstances, the OBs are used with full-range drivers so I had my 755Cs in OBs then... but we got hold of Altec horns/ woofer sets and at that time, we didn't have yet the 614/612 boxes... so based on the vintage Klangfilm speakers, we decided to try the horn/OB combination... thus the requirement for a crossover...
JE directed me to a x'over calculation site and used the first order (6db/octave) two-way x'over... we wanted to keep parts to a minimum as we felt, one good attribute of the full-range OBs is the non-usage of any x'over...
I'm using an 8 ohm compression driver for the mid/highs and 16ohms 12" woofer for the bass then a 511 horn which is rated at 500hz... so I just punched them in the calculator and came with a 40uf cap for the cut-off I wanted... My first x'over used parallel 20uf solens and then Prof JM was kind enough to give me 40uf oil caps from his parts treasure...
Next step was to control the horn, since I'm using OBs for the woofer, it needed a little taming... now you have to used the L-pad calculator from the same site... here. I experimented with different attenuation for the horns, if I remember right, I think I started with 10db and ended something around 12db or 14db... Stock on different resistors and try to get close to the values as required... don't be afraid to series or parallel them, and match them well...
The only thing we didn't follow in the first order x'ver is the use of choke for the low pass filter... we decided to let the bass speaker go full-range and overlap with the horn section of the hybrid OB...
I think SC is off-topic in his thread... he keeps on barking about the "TICKS and POPS" of analog in the "Let's Talk Digital" thread... oops OT na naman ako...
Regards,
Joel