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just wondering if one can add a 1.5mH to their 2.5mH inductor for conversion without too much DCR.
Karlson Evangelist
Follow Ups:
I think you are on the right track using the AK3 low pass section.
I would try for a lower DCR though, the stock woofer is only 3.2Ω DCR, so insertion loss from the woofer inductor adds up quickly.
thanks DJK - 14ga Super Q is the lowest "off shelf" inductor with ~0.15 - Electra-Print could wind a little tranformer core 4mh probably with 0.15 ohms dcr but he doesn't gap the stack - Orange County used to have some real beefy transformer core inductors.I've been so clumsy when piddling that have dropped and busted the plastic bobbin ends off most of my old Sledgehammer inductors - need to somehow get those off - if possible and make new retainers
Karlson Evangelist
Edits: 09/15/16
What was AK3 used in?. I have the A and AA here.
I guess it was in the line of Khorn networks. IIRC (?) AK2 used 4mH/140uF and AK3, 4mH/100uF in hopes to get a better blend between Khorn's basshorn and midhorn. - May take a low output impedance power amp to get the effect. Khorn owners could daisy chain 1.5mH with the stock A/AA 2.5mH inductor, wire things up with a switch or two to convert A/AA lowpass to AK3 lowpass and A-B compare.
Karlson Evangelist
Edits: 09/14/16
Shoot...looks like A/AA used 2.5's...wish I could help.
4mH probably has just a little more copper than the 2.5mH - my cheap ESR meter which seems to measure low inductance-wise, says the stock 2.5mH Klipsch inductor has 0.4 ohms DCR
Karlson Evangelist
So I'd guess .6 ohm for the 4 mh would be close.
I've got a transformer coil ~3mH rated (measures like my 2.5mH on cheap ESR meter) made by Electra-Print - not much larger than the Klipsch umot - DCR = 0.1 ohm - there's not gap in the EI stack - apparently, Jack thought there's no issue doing a speaker inductor that way - I wonderhow its distortion measures? - it would take a load, and safe attenuation to find out I think he made them this wa for Dr. Edgar but am no ture. (?)
Karlson Evangelist
Would be ideal to hook up a sig. gen.+ scope, w/dummy load and
couple hundred watts to play with and compare with air coil. But
I hear that it's not easy to get iron core to saturate...even
in PA situations. I doubt that it ever happens in home bass
horn applications.
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