Although I have not owned any really high end amps, I have been critically listening to music sysems for quite some time, and the old BGW's are excellent.They were marketed mostly for club, studio and pro audio. They are built like a brick and so is the bass response powerfull and TIGHT. the midrange is also very detailed. Thy are available in the used market cheap, because they are a bit too heavy for mobil applications by today's standards.
Nice clean clear tight power for cheap!!! and audiophile quality IMO.