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M-Audio have finally added specifications for the ProFire 2626:

Line Inputs (Balanced)

Frequency Response +/- 0.1dB, 20Hz to 22kHz (48kHz)
+/- 0.4dB, 20Hz to 80kHz (192kHz)

Dynamic Range 110dB, A-weighted

Signal-to-Noise Ratio -110dB, A-weighted

THD+N 0.0008% (-102dB), 1kHz, -1dBFS

Crosstalk -120dB @ 1 kHz

Maximum Input level +19.6dBu, typical



Line Outputs (Balanced)

Frequency Response +/- 0.1dB, 20Hz to 22kHz
+/- 0.6dB, 20Hz to 80kHz (192kHz)

Dynamic Range 110dB, A-weighted

Signal-to-Noise Ratio -110dB, A-weighted

THD+N 0.0013% (-98dB), 1kHz, -1dBFS

Crosstalk < -110dB @ 1kHz



Mic Inputs (Balanced) at Min Gain, No Pad

Frequency Response +/- 0.1dB, 20Hz to 22kHz

Dynamic Range 109dB, A-weighted

Signal-to-Noise Ratio -109dB, A-weighted

THD+N (min gain, no pad) 0.0011% (-99dB), 1kHz, -1dBFS

Crosstalk < -120dB @ 1kHz

Maximum Input level +6.5dBu, no pad

Input Impedance 3.7k ohms, balanced, no pad

Adjustable Gain >53dB without pad

Pad -20dB

ProFire 2626 specs at M-AUDIO