Specifications General Audio (Mic In-to-Main Output): Frequency Response: 10 Hz-20 kHz, ±0.2 dB, mic in/main out Distortion (THD N): 0.008%, measured at 1 kHz, mic in/main out S/N Ratio: 86 dB, referenced to –42 dBu mic in/–2 dBu main out Dynamic Range (A-weighted): 108 dB Connectors: Mic In, Line In 1 & 2, IFB In, Intercom Interface: 3-pin female XLR Main Out, Talkback Out: 3-pin male XLR Headphone Out: ¼-inch 3-conductor phone jack 24 Vdc Power In: 2.1 x 5.5 mm coaxial power jack with locking bushing, compatible with Switchcraft S760K plug Spare Connector Locations: 3 Allows up to three Neutrik NC*D-L-1 connectors to be installed (*=3F, 3M, 5F, 5M, 6F, 6FS, etc.) Microphone Input/Preamplifier: Type: electronically balanced Input Impedance: 2 k ohms CMRR: >80 dB, 20 Hz-20 kHz, 40 dB gain Gain Range: 20 to 60 dB, nominal, adjustable in 10 dB steps; 0 dB (no gain) also available Compatibility: dynamic or phantom-powered mics Phantom Power: 48 Vdc, nominal, meets IEC 61938 P48 standard Compressor: Threshold: 2 dB above nominal level Attack/Release Time: 2 mSec/100 mSec Slope: 5:1 Status LED: compressor active Line Inputs: 2 Type: balanced, transformer-coupled Impedance: 10 k ohms Nominal Level: –12 dBV to 6 dBu, adjustable IFB Input: Type: 2-channel, unbalanced (pin 1 common; pin 2 DC with channel 1 audio; pin 3 channel 2 audio) Impedance: 10 k ohms Nominal Level: –10 dBu Intercom Interface: Type: 2-channel, unbalanced (pin 1 common; pin 2 DC with channel 1 audio; pin 3 channel 2 audio) Compatibility: single- and dual-channel intercom systems such as from RTS® and Clear-Com® Impedance: 10 k ohms Nominal Receive Level: –10 dBu Nominal Talkback Level: –10 dBu Sidetone: 0 to –18 dB, adjustable Main Output: Type: balanced, transformer-coupled Nominal Level: –2 dBu Maximum Level: 20 dBu into 2 k ohms Impedance: 100 ohms Line-Level Talkback Output: Type: transformer-coupled with series capacitors and isolation resistors Impedance: 600 ohms Nominal Level: 4 dBu Maximum Level: 11 dBu (compressor restricts maximum) Headphone Output: 1, stereo Compatibility: intended for connection to mono or stereo headphones or headsets with nominal impedance of 100 ohms or greater Type: voltage driver Maximum Output Voltage: 12 Vpp, 150 ohm load Auxiliary Relay: Function: software configurable Contacts: 2, form C (Common, Normally Closed, Normally Open) Rating: 1 A, 30 W (resistive) Access: requires user-implemented connector scheme Power Sources: IFB Input: 24-32 Vdc, 125 mA Intercom Interface: 24-32 Vdc, 125 mA External: 24 Vdc, 90 mA @ 24 Vdc; acceptable range 20-30 Vdc. Each unit shipped with a universal input/24 Vdc output power supply. Options: direct microphone output card, line-level output card Dimensions (Overall): 8.1 inches wide (20.6 cm) 3.3 inches high (8.4 cm) 8.5 inches deep (22.4 cm) Weight: 4.5 pounds (2.1 kg)
