http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CT
LG%5F010%5F002%5F016%5F000&product%5Fid=900%2D2101

is the a non-polarized critter.  even cheeper.  WVDC plenty high enough.
Who's got the schematic for this fix?  Is it a filter to ground? Signal to
signal?  or ?

Specs as follows:

22�F 100V 20% Axial-Lead Non-Polarized Electrolytic Capacitor

$0.94   Reg. Price Brand: Ark
Cat.#: 900-2101 Model: NP AX 100V,22UF
(Pricing and Availability may vary outside the contiguous 48 United States.)

Where to Buy
On-line No
In Stores No
1-800-THE-SHACK Yes

Bi-Polar (non-polarized) electrolytic capacitors for crossover networks. 50V
caps are effective to approximately 70 watts RMS and 100V caps are effective
to approximately 200 watts. Specifications: operating temperature of -40�C
to 85�, low leakage current, and tolerance of +/- 20% (M).