Found a pair of the first 0.1 version of the speakers that had FOCAL dual 8 ohm voice coil replacement woofers, instead of the original Watkins 902-0470 5in unit. No one has parts for a rebuild as one FOCAL has one open voice coil.
After looking for original Watkins 0.1 woofers, that have dual voice coils, could only find original 0.3 woofers with single 4 ohm voice coils. The original crossovers when modeled in LT Spice have very different responses for each coil, so will not work. They have been removed from the cabinet and new biamp binding posts installed. I added a 1.25A fuse like the original on the EMIT planar tweeter.
To start have s notional Audio Weaver DSP crossover for the dspNexus 2/8 running for measurements. The EMIT's have response well beyond 20KHz, so that is one reason they are interesting. It is not flat, so time for REW measurements some EQ.
First measurement was an impulse response to get the timing between the woofer and EMIT corrected by 13 time samples at 192KHz sample rate. Easy to delay the tweeters!
Next will be listening seat measurements for full correction.
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II0.1Rebuild.jpg [ 1.17 MiB | Viewed 8072 times ]