PRaT is one of those characteristics that can be faked by having a hot upper midrange (can you spell Linn?) which emphasizes the leading edge or instrumental attacks. Certainly, you can kill PRaT with excessive resonance, and I'm not suggesting that all components with a "hot" tonal balance will have PRaT. You can certainly can enhance it with frequency response anomalies however.
As I was packing for my move I decided to hook up the little Rat Shack AV-7 speakers RX8man gave me. I used my mother's 23 yr old NAD receiver with the infamous AIWA changer, a Soundstream/Krell DAC-1 and some basic filters. The system was cooking!!! It had really good beat, congas sounded intense and the bass was there, giving great boogie factor. Then I decided to clean the unit, put some Sil-clear in the fuse holders and when I plugged it back the R channel blew up (I thought everything was dry, oh well...). Point is I got my vintage Yamaha A-1 dual mono integrated out of the box and when hooked up it didn't have the boogie factor of the NAD. The Yamaha is more neutral, quieter, more detailed, more musical, so I figured the NAD's PRAT was a trick...exaggerating the leading edge of the conga's freq range (upper midrange) and the string bass frequencies(they call that acoustically correct tone controls or something).
Very well.