Ampex ATR-102 Mastering Tape Recorder Reviews

Cool emulation

But GP9 needs +6 and +9 over standard because we used it at those levels.

GP9 was bias similar to 499 so it was used at +6 interchangeably with 499 but was a +9 Tape which some rock productions used for grime like recording bass or gtr line at 30ips while player plays line 1 octave up then play back at 15ips or do the opposite of above by octave down 1 at 15ips them playback at 30 ips. These give you such crazy types of grime you hear in rock productions in the 1990s

At +6 you could it the tape hard like 499 but with less distortion .

Play with bias to shape the response curve. MORE HI END DIP at MIDS AND BASS BOOST or opposite.