Acoustic Zen Crescendo speaker crossover capacitors ... who makes them?

Peter thanks so much for the post. This is new to me and I need to learn more about it. I will see if a can become more familiar with the idea and implementation. 

@pbnaudio 

Have you done this? I ask as I wonder if this will make these cheap electrolytic caps sound as good as decent metalized  poly caps? Very interesting.

So I hook up 4 nine volt batteries in series with the positive lead of the first battery going directly to a 1mohm resister then to the junction point of the series caps and the negative lead of the last battery going to the negative return of the low pass circuit. That simple? I better test that no DC is getting through. The electrolytic caps should be non-polar correct? 

Thanks!

Granny,

Yes I ave used this technique and it defiantly improves the SQ of a Bipolar Electrolytic Capacitor.   All capacitors in a Speaker Crossover should be Bipolar as this is an AC circuit.   If you google this there are many diagrams on how to connect the circuit, and you are describing it correctly,  you must however use a separate feed from the battery to each set of capacitors - luckily 1M Ohm resistors are very inexpensive.

One small correction to above post - since you are connecting the capacitors in series each should have a value of 2000uF, a series connection of capacitors results in half the value of each - i.e 2000uF in series with 2000uF = 1000uF

https://www.google.com/patents/US7443990

Best of luck

Peter  

Peter, I did figure that on the caps. Thank you for sharing this option.

In all honesty the whole Xover only passes small voltage through a Loudspeaker 
Everything is converted through the amplifier before the Loudspeaker. 
Myself learning well over 20 years ago Electrolytic are by far the worst possible 
Way to conduct a signal the only reason used in power supplies normally for is you needed say 10,000uf in capacitance, poly caps are night and day less distortion and noise but are  Huge vs same UF- Microfared in capacitance. 
In a Loudspeaker largest are in bass caps say 80uf for example.Bass nowhere as critical to the ear such as midrange a decent cap like Clarity ESA, or top shelf for Bass Which I use a Munforf Supreme  if in your budget.Duelund way too expensivefor Bass., but for midrange 
On a good speaker yes. In a speaker Never would consider leaving electrolytic 
All ways a poly cap. Go to magico, yg acoustic,marten, b&w only poly caps 
Electrolytic in power supply like my amp over 200k in capacitance,I then  bypass with good Audyn .1uf Caps 
Poly caps just to clean up the. high frequency noise.This is very common practice.
I just follow what the leading builders do. That being said you do whatever with your monies.