My system has a lot of poor man's high-end touches. If I can't build it, I usually buy an affordable piece and upgrade or modify it myself. Not only is that a great way to get better gear than budget allows, but it also helps me understand what's inside every piece of the entire chain. The system was good enough to satisfy my needs 30 years ago, and has slowly improved with mostly subtle refinements over time. It's truly beyond anything I could have hoped for as a younger lad. In 2023 the system got reconfigured in a tube/SS hybrid bi-amp configuration. The signal from the preamp gets split between separate amps for the midbass/tweeter and the main woofers. Twin stereo tube amps have an inline high pass filter ~ 60hz, and are run as single channel mono blocks to power the 5" midbass and tweeter. A solid state integrated amp was added to power the main woofers , and it also feeds the powered sub. An active crossover was added as a low pass filter to limit frequencies above 63hz to the integrated amp, and the original passive low pass filter of the main woofers has been bypassed. The speakers were made by my small company in Rochester, NY around 1990, and are the heart and soul of my system. They were the culmination of years of being in business and around the business. Focal 8K kevlar woofers in a transmission line, Focal 5k mid-bass with an aperiodic chamber that dumps into the transmission line, modified Seas tweeter, proprietary crossover with top shelf components. The crossover has it's own chamber, is wired with Kimber Kable teflon coated OFC copper, Litz wire inductors, CAT caps, Dale non-inductive resistors. It took around 5 years to dial the values before I moved them inside the speaker in 1995. Each driver has its own solid copper input. I always loved the sound of these speakers, and they've continued to get better with every component upgrade I've made. They seem to just pass along whatever they're fed, with spectacular clarity and imaging. I have zero urge to move on from these. The only speakers I’ve heard that I’ve liked as well were Charlie Hanson’s Avalons, and a pair of Magico S5 MkIIs, both had the benefit of being powered by CAT electronics.