Well, I bought some new PT800's off Ebay in December, and started tinkering soon after. Actually, I immediately decided that $2200 for a pair of PS1400's wasn't gonna happen. Besides I had already been biamping in my current set-up, and had some woofs available. SO..... I bought some Parts Express boxes and threw my Le10H-1's in them. I know a lot of folks consider 10's too small for bass, but I think these are the most incredible drivers made. Period. The Le10H-1 has never sounded like a 10" woofer to me. If you set these guys up for bass they will deliver. So, after some tuning to get things the way I like em, I started doing a lot of listening.
The Pt800's are some really, really clean sounding speakers. But, I never,ever emotionally connected to the music while listening to them.. I listened to them and played them constantly for several weeks, giving them ample break in time, but there was something about them that I couldn't relate too. The only flaws that I could identify were a treble that was a little too emphasized for my taste( on occasion), and I thought most importantly, that vocals just did not sound natural. In particular male vocals would sometimes sound funny. Anyway, I have what I consider a pretty good rig and I have never had the cash or felt the desire to spend big bucks on speakers. I had hoped the PT800's would be all things for me- but they weren't. Certainly fine speakers for what I had paid for them, but really not worthy of what I was driving them with.
So that's the background, and here's the story. So I decided to build some xovers according to the schematics with all premium components. It was not a cheap affair- about $700 in parts, but the results are easily worth it. The improvement was apparent immediately upon installation, but I still did not consider them my last stop for a while until they had broke in for a couple of weeks. Not after the couple weeks break in the sound has become so good that I often cannot imagine the sound being better! And that is a first of sorts for me. I have played them now many times since they have opened up for me, to be sure that it wasn't the moment ( or the wine), and indeed they impress the hell out of me every time I play them.
I have some pics. The first is the xover that I built in the outboard box that I built to house it, compared to the stock xover. The Mundorf 8.2 mfd cap is about half the size of the entire stock xover network alone! The second pic shows the xover box on top of the bassss unit behind the PT800. I built the xover boxes to fit perfectly there. I then filled the with sand and covered them.
Short story- The improved xover really release the true potential of these speakers.