ESS model IX help

[Sterben]

I am a new poster, sorry if i picked the wrong thread.

I recently acquired a pair of ESS model 9's, =I think.they have the body of 7's, the woofer of 9's, they say model IX on the back plate, and the midrange/tweeter appear to be on both. Anyway, they are getting some TLC and I need to know where I can find electrolytic 55uf 75w caps, they seem rather hard to come by. Alternatively and preferably, I was wondering if this community has any knowledge about the speakers I have, and could help me figure out what way to build this crossover. Thank y'all for any help!

 

[elnaldo]

Hello. Welcome to AK !

55uF is not a standard value nowadays, but you can parallel capacitors to achieve the desired capacitance. Capacitors in parallel add their capacitance. I'd fit a 47uF x 100Volt NON POLARIZED (or "BP" Bi-Polar) electrolytic, in parallel with a 10 uF, that will make 57uF, close enough (the originals are usually 20% tolerance). Or, if you prefer, you could parallel 47 with a 6.8Uf film capacitor (polyester or polypropylene, polyester is cheaper) , this will give you 53.8uF , and parallel another 1uF film capacitor. I'm sure 1 or 2 uF in 55uF won't make any difference, audible or measurable.

Check the AK sponsors for parts. Many people buy from Parts express, partsconnexion, madisound, Mouser , Digikey (no affiliation). Many people use "Bennic" electrolytic capacitors (no affiliation), they are not expensive.

If you want, or if you suspect your crossover is not wired correctly, or it has missing parts, post here a drawing with all the connections you have, and the components with their values, to see what is the right wiring

 

[Sterben]

I built them from the ground up instead!

Dayton audio reference 1 1/8" silky
Hivi 6.5" midrange
Dayton audio 12" woofer
Custom built crossover 2nd order L-R

 

[Sterben]

This is how they looked before modification, those are infinity crescendos for size comparison

 

[Sterben]

This is what was in them, no-name blown tweets, crossover was shot to the point midrange was about blown from playing highs, and I am selling the woofers.