General Audio Parameters:
Frequency Response: 20 Hz to 20 kHz, ±0.5 dB, mic/line in to main outs
Distortion (THD+N): 0.03 %, measured at 1 kHz, +4 dBu, mic/line in to main outs
S/N Ratio: 74 dB, referenced to +4 dBu, mic/line in to main outs, 22 Hz to 22 kHz
Mic/Line Inputs: 4
Input Sensitivity: switch selectable for microphone or line-level signals; 44 dB line input "pad" implemented using sealed bifurcated contact telecom relays
Phantom Power: 48 Vdc, nominal, meets IEC 61938 P48 standard
Operating Level Range: mic input position: –76 to –8 dBu; line position: –32 to +28 dBu. Range specified to give +4 dBu on main outs, master level controls set to unity gain.
Type: electronically balanced
Impedance: mic position 1.3 k ohms, line position 15 k ohms
Common Mode Rejection Ratio: 74 dB @ 60 Hz, 73 dB @ 40 kHz (typical), mic position, ref +4 dBu on main outs
Status LED: dual-color, displays signal present and peak
Line Inputs: 4
Operating Level Range: –14 to +28 dBu. Range specified to give +4 dBu on main outs, master level controls set to unity gain.
Type: electronically balanced
Impedance: 24 k ohms, nominal
Common Mode Rejection Ratio: 85 dB @ 60 Hz, 85 dB @ 40 kHz (typical), ref +4 dBu on main outs
Status LED: dual-color, displays signal present and peak
Compressors: 2
Function: controls dynamic range of output buses 1 and 2
Type: single-knee, VCA-controlled
Slope: 5:1
Threshold: configurable, choices are: 6 dB over nominal (+10 dBu on main output, factory default); 2 dB over nominal (+6 dBu on main out); disabled
Attack Time: 2 ms
Release Time: 100 ms
Status LEDs: 2, compressor active
Main Outputs: 2
Type: electronically balanced, capacitor-coupled, intended to drive balanced or unbalanced loads of 600 ohms or greater
Source Impedance: 50 ohms, nominal
Nominal Level: +4 dBu
Maximum Level: +26 dBu into 10 k ohms, +25 dBu into 600 ohms
Monitor Outputs: 2
Signal Sources: output buses 1 and 2
Type: electronically balanced, capacitor-coupled, intended to drive balanced or unbalanced loads of 600 ohms or greater
Source Impedance: 50 ohms, nominal
Nominal Level: configurable, choice are: +6 dBu, with monitor level control @ 100%, mode configured for POST level control; –10 dBu when configured for PRE –10; +4 dBu when configured for PRE +4
Maximum Level: +26 dBu into 10 k ohms, +25 dBu into 600 ohms
Headphone Output:
Signal Sources: output buses 1 and 2 ("post" monitor level controls)
Type: stereo, configured to drive headphones through 100 ohm series resistors
Compatibility: intended for connection to headphones with impedance of 100 ohms or greater
Maximum Voltage: 8 Vpp, 100 ohm load
Reference Tone:
Frequency and Wave Form: 400 Hz nominal, sine wave (technician can revise to 1 kHz)
Direct Output Level: +4 dBu, nominal, adjustable over –1/+3 dB range
Direct Output Type: electronically balanced, capacitor-coupled, intended to drive balanced or unbalanced loads of 600 ohms or greater
Direct Output Source Impedance: 100 ohms, nominal
Meters: 2
Function: displays level of output buses 1 and 2
Type: 10-segment LED, modified VU ballistics
Connectors:
Mic/Line and Line Inputs: 3-pin female XLR
Main Outputs: 3-pin male XLR
Reference Tone Direct Output, Monitor Outputs, Headphone Output: ¼-inch 3-conductor phone jack
AC Mains Input: 3-blade, IEC 320 C14-compatible (mates with IEC 320 C13)
DC Input: 4-pin male XLR
AC Mains Requirement: 100-240 volts (–15/+10%), 50/60 Hz, 15 W maximum
DC Input: 10-18 volts DC, 1.0 A maximum @ 12 volts; 1.1 A maximum @ 10 volts; current draw when AC present is less than 100 uA
Dimensions (Overall):
19.0 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
9.2 inches deep (23.4 cm)
Mounting: one space (1U) in a standard 19-inch rack
Weight: 4.3 pounds (1.9 kg)