Wow. Just wow.
It seems that the pultec style EQ has come back into vogue. With companies like tube tech, IGS (Rubber Bands), A designs and others all taking their own stab at re-creating a classic. Before these companies started recreating these clones and tributes, You'd need luck AND a wad of cash to get an original pultec eq. Well, throw the PEX-500 on the heap of those using the inspiration of the original tube eq that crafted so many hits.
The verdict? Wow. First off, obviously its not a tube EQ like the real pultec, and there are less frequency bands selectable than the original, BUT what is offered is well thought out, and expertly pulled off. When used responsibly, the high boosts are never harsh, but add a beautiful bright sheen that does indeed harken back to the glory of its inspiration. It takes a good understanding of HOW a parametric EQ works and what bandwidth (Q) settings are appropriate in different scenarios, respectively. The low boost is thick and powerful, not flubby, honky and undefined. Use it conservatively until you get a good feel for NOT over doing it. I LOVE these on drum overheads, on DI bass (They really make the high and low end come to life as well as adding needed warmth to sometimes harsh DI digital bass recordings.) I use a pair on bass DI/Bass Amp religiously (over several high end EQ's)
I bought 6 after using a pair borrowed from a local studio on drum overheads in a mobile session. I also sprung for Lindell's 6 space 500 series chassis. Its built like a tank. I had an issue with one of the 6 PEX500's I bought. The unit flickered on and off like it wasn't powering up properly, it'd be fine for about 5 minutes, then go haywire again. Lindell fixed the issue, and instead of sending me a new one, they just credited me for another at the store I purchased it from. Done and Done. The sales rep at the store said it was the first of many Lindell products they've sold they had any problems on. I'm inclined to believe him. 5 stars all the way. Id love more frequency bands, and maybe a midrange capable version (or a basic copy of the pultec mids MEQ) but given the price, and given that every band, every filter sounds amazing, I'm inclined to keep my mouth shut and love it for what it is. If you own a studio, don't think, just grab AT LEAST a pair. When we've spent upwards of $3000 per one channel of EQ this should be a complete no brainer.