This a bit of a read, but some of the tests on caps have audio with them. Sounds like a guitar rather than a bass, and the audio is nothing to write home about, but there ya go
http://zerocapcable.com/?page_id=224
Why not just get a new bridge - you wont save much or indeed anything at all just buying barrels
https://www.ebay.co.uk/itm/Chrome-Block-Style-4-String-Bass-Guitar-Bridge-Assembly-57mm-String-Pitch/263864124132?hash=item3d6f8702e4:g:WJwAAOSwat5baV2r
Fancy a giggle ?
Check the price here ....
https://www.pmtonline.co.uk/orange-4-stroke-500-bass-amp-head?utm_source=google&utm_medium=shopping&gclid=Cj0KCQiA_4jgBRDhARIsADezXcipcD-L0b8eZrLp1cRmlvbpFpPnCanQ2cGU2Rq4meTdISymMKNL4PkaAnUQEALw_wcB
Then check the price here ...
https://kytary.co.uk/orange-4-stroke-500/HN190039/?gclid=Cj0KCQiA_4jgBRDhARIsADezXcjpf7ooFwq0_KGous8jly14JOiAFL8ZiITkRrQ-jgXJ_njnqBR3OfsaAjqhEALw_wcB
Assuming the units are 8 ohms
Build four 2x10 cabs. A 4x10 is a weighty beast , and these days most ( maybe not all ) want cabs they can put in a carrier bag and take to gigs.
You could keep 2 cabs so you could have one 8 ohm cab for small gigs and two cabs for a 4 ohm ( assuming your amp can do 4 ohms) monster gig and sell the other two 8 ohm cabs. I think 2x10's will be easier to sell than a 4x10
I guess mr Bridgehouse explained this but i must have got lucky. I have another active bass to try, so i'll see if i can replicate the buzz on that one