Should I buy used Thiel CS5

You will want to replace electrolytic caps.

No electrolytic caps, all plastics, last forever (well almost)

https://www.whatsbestforum.com/data/attachments/17/17403-3e3aa52a4bb8c32c4dab3b281e022f17.jpg

" The CS5 crossover is itself also heroic. Constructed on a single hard-wired board, it incorporates 87 elements realized with 114 components. Only—only—55 elements are directly related to the first-order high- and low-pass filter functions, the rest being used to fine-tune the system’s time response. The two midrange units, for example, are electrically "moved backward," by the equivalents of ¾" and 3/8" respectively, to bring their acoustic centers into the correct alignment.
All coils apart from one are air-cored, and the capacitors are polypropylene and pure polystyrene types, the latter custom-made with tinfoil plates and copper lead-out wires. The internal wiring is a polypropylene-insulated solid-core type."

The tweeter on these older Thiels some find very objectionable.

I only found that with with bad recordings or soso electronics, same also goes for the CS7

No electrolytic caps, all plastics, last forever (well almost)

Holy cow! That's a crazy number of parts!
It does *look* like there are 2 ELs at the bottom of the pic, maybe a couple more at the other end? But, yeah, mostly film caps (PPTs and MKPs). Nice.

Still, *I* would upgrade the resistors and probably some of the caps for better sonics if not to replace drifting ELs.

I dont care what quality of parts you put in this crossover it is an abomination in terms of complexity and total number of parts. Seems to be a very complex way to approach whatever problem Mr Thiel was attempting to solve. When I look at a crossover like this I simply scratch my head and wonder why.

This info on the caps below in italics is from the owner that stripped them, and "time alignment" parts info from Thiel.

complexity and total number of parts. whatever problem Mr Thiel was attempting to solve.

The two midrange units, for example, are electrically "moved backward," by the equivalents of ¾" and 3/8" respectively, to bring their acoustic centers into the correct alignment.

It does *look* like there are 2 ELs at the bottom of the pic

All coils apart from one are air-cored, and the capacitors are polypropylene and pure polystyrene types


Cheers George

@georgehifi
Yes, I read all of your earlier post. I’m just saying it looks, LOOKS, like there are two ELs on that board. All the yellow caps are probably the custom-for-Thiel polystyrenes. On other models I’m more familiar with these were 1 uF bypasses (much of what I know comes from Tom Thiel). The larger black ones with red ends look like Solen polypropylenes. But there are two smaller black ones with a middle hump and rounded ends that are similar shape to ELs.

For example (Link)