Seem rather slow, expect HF distortion rises rapidly as a result. They are fast enough to avoid slew-limiting at 20kHz full swing, but slower than most "audio" opamps. Perhaps useful where rail-to-rail required at low power consumption.
They should sound invisible like every other audio opamp, of course, except to testgear, as distortion is very low (less than 0.001%).
They should sound invisible like every other audio opamp, of course, except to testgear, as distortion is very low (less than 0.001%).