Hi,
so I've decided to keep you informed about my 4430 studio monitor builds. I've collected all necessary parts so far, the drivers, the biradial horns, the passive components. I don't want to go active, mostly due to the unobtanium 5pdt switches.
If someone feels bored by this thread, please let me know. I'll be stopping it at once. Otherwise, critics are welcome!
Today I've built the crossover networks. I've bought stock 2.7 mH, 1.8 mH, and 50 µH chokes and unwound them until my LCR meter read the required values of 2.6 mH, 1.6 mH, and 40 µH, resp. To get the also non-standard capacitances, standard capacitors were paralleled by smaller ones.
Here's the pair without the controls:
Then I connected the L-pads and the rheostats:
Some weeks ago I've shown how I modified an 8 ohms L-pad for a 30 ohms rheo. They're now part of my construction.
Still I don't get how the 3134 xover works. Somewhere I've read that the 30 ohms rheo opens if turned fully ccw. Now if the L-pad is turned fully ccw at the same time, this would mean that only the 2235H works, and frequency response is limited to 1 kHz with a 12 dB/oct slope. I really can't believe that.
My rheo's don't open, btw, their resistance is 30 ohms in this case.
Best regards!
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