Listening again to the original file... don't know if are the speakers, but I can hear a little distortion on the bass note at about 1:10 and on some of the piano notes at about 1:38. I have a Cambridge 5:1 System with a subwoofer.
The sax is just beautiful! Where did you get it from?
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.