Self Medicating > General DIY
Infinity Kappa 8 speaker rebuild with DSP crossover
malloy:
That is indeed a good deal.
Some new binding posts cost more than that! :thumb:
Paul
HAL:
Looks like the Polydome K and 12in woofer drivers repairs are complete and should be shipping back soon.
The other parts are starting to arrive. Have the Belden 1309A 14awg stranded speaker wire and the P-E 5-way binding posts.
My idea is to remove the back plates and make new ones with the 8 binding posts to the drivers.
Going to keep the EMIT K tweeters wired as a pair as in the original design. I probably will try them as a Bipole and have a spare EMIT K planar tweeter arriving for a test of the idea. Since their impedance is less than 4 ohms, will have to use a good power resistor to bring up the impedance to drive them correctly to full range with Class D amps. Mills non-inductive power resistors should do nicely.
Probably will not need the protection diodes with the high roll-off rate DSP crossovers. Will be there for the passive side.
Also building an AB box to switch from passive to active crossovers to hear the difference. Have some solid state relays coming to test for sound quality. Not that happy on using mechanical relays for audio switching.
malloy:
Nice.
Curious as I have never heard the originals. What is the sound signature of the original Kappas?
HAL:
I am the same as you. Never heard the original speakers.
Once I get the repaired drivers, will be checking them out. Could not afford them back in the day. I had Magnepan MGIIB's and Hafler DH220 amps when these came out.
malloy:
Doubly exciting then!
Back then, all I had was my Sony midi system. I always had my face pressed against the glass of the local hi-end store that had an Infinity IRS Beta on display wondering how those would have sounded.
Please keep us posted.
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