Self Medicating > General DIY
Infinity Kappa 8 speaker rebuild with DSP crossover
HAL:
Will do.
Waiting on the drivers to return from repair. Original estimate was they would complete repairs tomorrow. Hope they are one schedule.
Everyone that has reported on the Millersound repaired Polydome K midranges have said they are quite an improvement over the original material. Should be interesting.
Have a few spare EMIT K's coming as well. Suggestion by a friend with Infinity Beta's with the same EMIT's. There are now replacement planar driver diaphragm's for them that are easy to replace from American Vintage Audio. He also makes replacement planar diaphragms for the larger EMIM planar mids.
Did discover that over time Infinity changed the planar magnets from Samarian Cobalt to Neodymium magnet material. The Neo style have a part number with an N suffix. The Neo's are higher field strength magnets, so increases the sensitivity of the drivers.
Interestingly it will be a pair of Kappa 8's brought up to 2024 status for the AB listening.
HAL:
Things lead to things.
A pair of Infinity RS8 2-way speakers popped up for $100 that were made from 1982-1984. These have the earlier Samarian Cobalt magnets for the EMIT planar tweeters. The woofers are 8in diameter polypropylene cones that have had new foam surrounds installed.
Found pictures of the 2 pole high pass and low pass filter passive crossovers. Looks like iron core inductors, a metalized mylar cap in the tweeter and non-polar electrolytic cap in the woofer circuit. A protection fuse on the tweeter. The price for the speakers was $299/pair.
These are the same type of parts use in the passive crossovers in my pair of Magnepan MGIIB's from 1982. Polypropylene replacement caps were a great upgrade to those. Now we have even better DSP crossovers.
malloy:
Wow! Where do you get all this nice gear? The local thrift stores only have Radioshack-level equipment. :lol:
HAL:
Facebook Market Place has a lot of great equipment.
HAL:
The Infinity Kappa 8 Polydomes and 12in woofers are back from repair.
Now to see if the passive crossovers are still working with the drivers connected.
Will be rewiring the speaker drivers to binding posts to use with the DSP crossover and the passive crossover exterior to the original box.
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