@vair68robert Thanks for posting pics of your CS2.7 crossovers. Fascinating to see that compared to my FST (China)-sourced boards that were OEM in my CS2.4SE. Yours are point-to-point on Masonite compared to my PCB (@tomthiel says PTP was the Thiel protocol for most of the company's history). Also, your parts quality is definitely higher than my OEM boards. Other than the excellent Clarity SAs on the coax feeds, I had CYC MKT (polyester!) caps, loosely wound coils, and unlabeled resistors. But I was probably most surprised to see that multi-strand hookup wire on your boards (reminds me of what I used for speaker cabling when I had a mid-fi system). My OEM hookup wire was solid core (18 ga) the + and - wound to 3 twists per inch. Tom told me that was the Thiel standard. Your boards seem to be a quasi Frankenstein of classic and new Thiel (mostly in a good way!). I wonder if yours are typical of all CS2.7.
But my Tom Thiel-designed boards are a whole 'nuther level! If you're inclined, you might play with upgrading the parts quality on your boards. An easy and affordable place to start is to replace those sandcast resistors with Mills MRAs. I replaced all of my resistors for about $100 - that was my first upgrade before the full rebuild.
But my Tom Thiel-designed boards are a whole 'nuther level! If you're inclined, you might play with upgrading the parts quality on your boards. An easy and affordable place to start is to replace those sandcast resistors with Mills MRAs. I replaced all of my resistors for about $100 - that was my first upgrade before the full rebuild.