Sound Devices 664 - Manual (Page 69)

Specifications
Analog Inputs
Frequency Response 10 Hz to 50 kHz, ± 0.5 dB
THD + Noise 0.09% max (1 kHz, 22 Hz–22 kHz BW, fader at 0, 0 dBu output)
Equivalent Input Noise -126 dBu (-128 dBV) maximum. (22 Hz - 22 kHz bandwidth, flat filter, trim control fully up)
Input Type XLR-3F Mic: Active-balanced for use with ≤600 ohm mics
XLR-3F Line: Active-balanced for use with ≤2k ohm outputs
RTN A,B,C (3.5 mm/10-pin): Unbalanced stereo for use with ≤2k ohm outputs
Link I/O: Unbalanced stereo for linking to Sound Devices MixPre, 302, 442, 552, and 664.
Input Impedance
(ohms actual)
XLR-3F Mic: 4k ohms
XLR-3F Line: 10k ohms
RTN A,B,C (3.5 mm/Multi-pin): 30k ohms
Link I/O: 2k ohms
Input Clipping Level 0 dBu minimum (trim control fully down)
Maximum Input Level XLR-3F Mic: 0 dBu (0.78 Vrms)
XLR-3F Line: +40 dBu (80 Vrms)
RTN A,B,C (3.5 mm/Multi-pin): +24 dBu (12.4 Vrms)
Link I/O: +6 dBu (1.5 Vrms)
High-Pass Filters
Sweepable 80 Hz to 240 Hz, 12 dB/oct at 80 Hz,
6 dB/octave at 240 Hz
Microphone Powering
(each analog Input selectable)
Dynamic (no power applied),
12 V Phantom - through 680 ohm resistors, 10 mA per mic available,
48 V Phantom - through 6.8k resistors, 10 mA per mic available
Input Limiters Affects the output of the mic preamps only (‘Trim’ stage),
+16 dBu threshold, 20:1 limiting ratio, 1 mS attack time, 500 mS release time.
Digital Inputs
AES3 Balanced: 110 ohm
Unbalanced: 75 ohm
AES42 AES42 Mode 1, provides +10 V Digital Phantom Power
664 User Guide and Technical Information
63
Specifications