Endo

Would that be "long term reliability" ... or the other thing?

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Is there anything to this idea of break-in, ... Do fresh new caps get better with use?--I don't know about this.

I am in no-way knowledgeable (trying to learn), but ran across a cap comparison that's seems pretty exhaustive... Its largely subjective material--but having such a wide range of product lines reviewed in a single place, with some semblance of consistent baseline across the spectrum creates a kind of utility, I think, even though one may disagree with some of the content. The panelists also make a distinction between power and network applications, and complimentary pairings, which I found helpful. Here it is: http://www.laventure.net/tourist/caps.htm#AAA

Don't see this everyday. Looks like a time saver for those exploring new driver configurations. Thought someone here might be interested. https://www.ebay.com/itm/Vintage-Pioneer-SF-850-Electronic-Crossover-Network-Untested-As-Is/303151428509?hash=item46953bb39d:g:jmkAAOSwq8tc1vxC

^^ There was an early II, and a much later II -- similar nomenclature, different variants, and decades apart from each other. [Edit] It was an "Ask the Historian" post (5/17) that clarified this for me.

Well, the new 2uF and 5uF AudioCap PPT Thetas are in, the boards look like this: I've been listening to them for three days: First, comparing one channel w/updates against the other without (my amp lets me play either channel through both L and R). Then, with both boards updated, I compared the CWs against the Belles (done simply to satisfy my curiosity as to their differences). At this point, I feel pretty confident in saying @geoff. was on-target about my particular situation. Thanks, again to all who helped me navigate through this.

For the purpose of checking higher frequency compression drivers, I have found that it helps to have a rag of some kind (t-shirt?) that you can stuff into the horns (especially the tweeter horn). In my experience, this makes confirming the tweeters easier, more apparent. (This may be something that applies only to geriatrics, like me)

Big white cap with blue ends, just like DaMuffinMan's here:

Thank you, all, for the thoughtful responses. Yesterday, I ordered Audiocap PPT Thetas (at Deang's suggestion). I'll be replacing the 2uF and 5uf, leaving the large (Aerovox?) caps in place (these large caps each measured 67.2uF, and I've read they're spec'd at 68uF ? – not sure I have that right, but I think so... ). This forum is a great resource – Thanks again, to all the good natured folks willing to share their experience. I intend to follow-up, once the results are in.

Wow, that's awesome! I appreciate the thoughtful response. What are my Cornwalls made out of? They're just like the H's in the original post and also like the Nesovski H's posted above. What kind of plywood is this? Here is an image from the OP. You can see both the Fir in the core, and also the mitered construction to the cabinet. Interesting... what is that stuff.

Yes, Klipsch did, I have a pair. Please bear with me, here... This was one of the points I was trying to make. Actually, Klipsch used at least 2 different types of "birch plywood" – and NOT interchangeably. The 2 kinds of birch ply seem to be used, each for different cabinet types: • The high-grade product that originates in Northern Europe (aka Baltic Birch). This is easily discerned by its uniform and alternating contrasting layers (there are 7 of these layers in the 18mm/3,4 product). Klipsch used this on the typical, unfinished, butt-rabbet-lap-jointed from first series time period. (sometimes called 'multi-ply'; if Klipsch wasn't getting it from Russia, then they were buying something comparable) • The other kind is what I've been referring to as a cabinet-grade, veneer core (likely a mixed-fir core or poplar as you've noted, as opposed to MDF core, or a hybrid core). While the latter is also void-free, it does appear more irregular in the edge striations, is available faced in either rotary or plane cut – and Klipsch used this on the miter joint Birch cabinets in addition to the MDF core. They exist. Also, it appears these 2 kinds of birch ply were NOT used interchangeably–but each to its intended purpose. [ Edit ] – While it may sound like I'm itching to be contrary, I'm more motivated by the fact that these historic speakers are valuable – and anyone concerned with their care, preservation (and maybe restoration?) might find these not-so-important details of interest. If an enthusiast isn't willing to venture into absurdity once in a while, attempting to satisfy the insatiable, why bother? It just feels right. Peace. I invite correction, if I've got any of this wrong.

Yes, and keep your strike-anywhere matches next to the beans.

^ Thanks for the clarification! There is something about the nature of online, public forums that encourages cantankerous, ill-mannered exchanges. @HDBRbuilder Thanks, again. If I misspoke, I certainly meant no offense. I love this place!

The screens look very nice – but photos can hide some things. I may be alone, but I think they look okay. If the rest checks out, and if he comes down a little in price – I'd be tempted. Seems to me that Heresys (sp. Heresies?) are bringing a little more now than they were just a couple years ago. I've been looking for a while now, and that's my impression. Agreed, six is high, but by how much?. (no signs of high water--maybe these were up off the floor?)