Source:
Sennheiser 441s pointed straight at speakers (10-20 degree spread) on "the ledge" high, dfc > Sony SBM-1 > Tascam DAP-1 (48k) DAT master
Lineage:
Master DAT playback - Sony A7 > SB Live (48 > 44.1 conversion) > Cool Edit Pro 2 and single wave was normalized to 100% not equal L/R.