Author Topic: Infinity Kappa 8 speaker rebuild with DSP crossover  (Read 1178 times)

Offline malloy

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Re: Infinity Kappa 8 speaker rebuild with DSP crossover
« Reply #15 on: June 04, 2024, 09:55:08 PM »
Nice.  :thumb: Like I've been saying, "Exciting stuff!"

Offline HAL

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Re: Infinity Kappa 8 speaker rebuild with DSP crossover
« Reply #16 on: June 05, 2024, 04:13:33 PM »
Unpacked the repaired drivers for the Kappa 8 repair.

Wiring the drivers directly to a new terminal plate.

Offline malloy

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Re: Infinity Kappa 8 speaker rebuild with DSP crossover
« Reply #17 on: June 06, 2024, 10:52:46 PM »
Wow. These even still have the Infinity logo on them! Were the surrounds the only things damaged?


Offline HAL

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Re: Infinity Kappa 8 speaker rebuild with DSP crossover
« Reply #18 on: June 07, 2024, 01:32:39 AM »
The woofers dust caps were foam and deteriorating as well so were replaced.

Millersound designed a new replacement dome system that is based on the dust cap of the 12in woofer.  They are the only ones that replace domes on original Polydome K midranges.  They have gotten good reviews for their work, so decided to give them a try.  Everything seems very well done.

All the rest of the replacement companies have designed new Polydome style drivers.  There are at least 3 of them that make new midrange units.  Problem I see is that the Kappa 8 speakers rated sensitivity is 89dBSPL/1w/1m.  One of the replacements is 83dBSPL/1w/1m and another is 81dBSPL/1w/1m sensitivity, so do not seem to be a good fit for replacements.  One designed by Vifa/Scan Speak is 92dBSPL/1w/1m, so it should be a good fit, but it is the most expensive replacement driver.

Offline HAL

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Re: Infinity Kappa 8 speaker rebuild with DSP crossover
« Reply #19 on: June 07, 2024, 07:28:59 PM »
The new wiring is ready and now waiting for two plastic plates to be cut for the new 5-way binding posts to be mounted. 

Will take some pictures when I have the connector plate is completed with wiring.

The original crossover will be external so listening to both passive crossover and DSP version can be done with levels matched.