SoundCraft Spirit Folio 4 - Manual (Page 26)

Technical Specifications
Noise
(Measured 20Hz - 20kHz RMS)
Mix Noise (all channels routed, faders down) -82dBu
Residual Mix Noise (Mix fader down) -98dBu
Group Noise (all channels routed, faders down) -82dBu
Residual Group Noise -94dBu
Auxiliary Noise (Inputs down, Masters at max.) Aux 1-4 -82dBu
Aux 5-8 -80dBu
E.I.N. (150 Ω source, max. mic gain) -129dBu
Total Harmonic Distortion
(inc. Noise @ 1kHz)
Mic Input to Mix Output
(Input -30dBu, Input & Mix Fader unity, Output +14dBu) <0.007%
Line Input to Mix (at unity gain, +14dBu output) <0.002%
Stereo Input to Mix (at unity gain, +14dBu output) <0.0015%
Crosstalk
(@ 1kHz, typical)
Input Fader cut off -100dB
Channel ON switch isolation -110dB
Routing switch isolation -85dB
Adjacent Channel (Mic gain at max., 150 Ω termination) >-95dB
Odd to Even Group isolation via PAN control -70dB
Auxiliary Send cut off -90dB
Stereo Return (A, B, C, D) control cut off -88dB
2-Track Return cut off -90dB
2-Track to Mix isolation -100dB
Frequency Response
Mic Input (mid gain) to Mix, via Group (longest path) -1dB, 20Hz - 30kHz
Mono Input EQ flatness +/- 0.5dB, 20Hz - 20kHz
Stereo Input flatness +/- 0.5dB, 20Hz - 20kHz
Input & Output Levels
Maximum Mic Input +16dBu
Maximum Line Input +28dBu
Maximum Stereo Input +26dB
Maximum Output (any output) +22dBu into bridging load
Maximum Mic Gain (via Group) 68dB
2-Track Return sensitivity -18dBu (100mV Hi-Fi level)
Stereo Return (A, B, C, D) sensitivity -11dBV (275mV)
SPIRIT FOLIO 4
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