From what I’ve seen and read 10-15 years is when it can start, depending on environment (dry/humid/hot/cold), how they were used (sedately or punished) and quality of the Ferro-Fluid (dries out quick or slow). People think their tweeter needs replacing when all it needs is a little time and new fluid https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1312.R1.TR0.TRC0.A0.H0.TRS1&_nkw=speaker+Ferro+fluid&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=speaker+Ferro+fluid Cheers George |
Other way around to me, the tweeter doesn’t need taming, it’s oil can resonance is well above 25khz and low in amplitude The dac/pre/amp has to be good, so the tweeter doesn’t show up their HF deficiencies. There is the possibility though that the tweeter if "ferro-fluid" cooled, this will go hard with age and cause non linear sound distortion issues. B&W need their ferro-fluid replaced around this same age https://www.speakerrepairshop.nl/en/instructions/replace-ferrofluid-in-tweeter/c-36 Cheers George |
This info on the caps below in italics is from the owner that stripped them, and "time alignment" parts info from Thiel. 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 picAll coils apart from one are air-cored, and the capacitors are polypropylene and pure polystyrene types Cheers George |
But there are two smaller black ones with a middle hump and rounded ends that are similar shape to ELsPossible, but the guy that stripped those xovers and posted the pics says they are plastics, Those ones have "two little men" on them after I zoomed in on them, which I’ve never seen, and they seemed to have been bypased with poly’s If they are bi-polars electros then yes change them as they are only a couple of dollars each. Cheers George |
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. 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 |
I think that's a bit of an exaggeration made mostly by Stereophile.A 87db 150w is fine (even 100w) , what Stereophile means is you need good current to back up that 150w so it can do up to 300w into 4ohm and try to get near to 600w into 2ohms. (If you want the best from them) " it can be seen that the CS5 presents an amplifier with a pretty severe load. To say the least—"current capability" if the sound is not to become anemic." https://www.stereophile.com/images/archivesart/690CS5FIG01.jpg Cheers George |
jeffvegas If they are in good condition, a definite yes, as even by today’s standards one of the greats, but only if driven from an amp that is stable and can deliver big current into 2ohm continuously and remain comfortable doing it. Stay away from tubes, most Mosfets, and Class-D "if" you want to get the very best out of them, read here. https://forum.audiogon.com/discussions/what-class-d-amps-will-drive-a-2-ohm-load Cheers George |
