The key. Hear is in the Xover parts ,I have worked building them and these 2.3, and 3.6 the Xover parts , need much better quality , and a warmer sounding capacitor
plain and simple ,the cheap 50 cent cement resistors don’t help at all , and crappy no name, and Solen capacitiors are ranking fought a 6-7 at best out of 15 ,use a mills resistor a Big step up for a lousy $5 each yes it may cost you $1k to rebuild the Xover boards but I can tell you 100% a night and day improvement in sonics on every level .for the vast majority f speaker mfg even at $10 k+ go cheap on Xover parts , it’s the 🧠 or heart ♥️ of your Loudspeaker . The audio signal goes through here good or bad , stock most speakers have 💩 Xover parts .
i not only owned a Audio store but worked with top techs in modding Loudspeakers,as well as electronics . A good rule of thumb roughly only 25% of your electronics, or speakers cost goes into the speakers , the rest goes into overhead packaging , and dealer markup , just think a $$4k pair of speakers only $1k goes into the whole speaker including cabinet and packaging. Sad but true .
i look for very good quality used then rebuild ,I just bought a Dynaudio Contour 3.4 speaker ,excellent build quality and very high quality drivers , then just removed the wiring ,and upgraded the Xover boards , now with my SVS 4000 SB subwoofer you have at least a speaker system over $12 k for a total investment around $5k .
very easy to do ,the key is the drivers and cabinet , the Thiel has a lot of potential .