| Test | M-Audio Delta 66 1/2 | M-Audio Delta 66 1/2 mixer |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.02, -0.09 | +0.06, -0.19 |
| Noise level, dB (A): | -97.1 | -93.4 |
| Dynamic range, dB (A): | 97.3 | 92.5 |
| THD, %: | 0.0009 | 0.0007 |
| IMD + Noise, %: | 0.0044 | 0.0070 |
| Stereo crosstalk, dB: | -98.2 | -71.2 |