The AVN-TB20AD is a desktop version of the rackmount AVN-TB20AR intercom with a smaller form factor and an elegant sloped front. It has the same feature set and connectivity *. * Except for an additional headset connector on the rear of the AVN-TB20AR. 20 illuminated key-cap Talk buttons plus Listen & Page buttons.
Product Features
20 illuminated key-cap Talk buttons plus Listen & Page buttons.
Phone button for remote dialling and control of an external telephone hybrid.
Page button and Group Talk facilities.
Callback button with callback source display.
Three user definable buttons.
Speaker & microphone mute buttons.
Mic & headset inputs, headphone & speaker outputs.
Front panel volume control which operates on speaker/headphone outputs and incoming source levels.
+48V phantom power for the mic inputs.
Ethernet webserver and front panel control & configuration.
Front panel display providing source & destination information.
Sources from AoIP, 1 x balanced, 2 x unbalanced or S/PDIF digital inputs.
Destinations to AoIP or rear panel balanced & unbalanced outputs.
Advanced echo cancellation & mic AGC to prevent acoustic feedback.
Dual 1Gb lan ports & 1Gb SFP fibre port.
10 user assignable GPIO ports.
GPIO button for triggering external events, via physical GPIO or network commands.
Front panel LEDs for network audio presence, Talk activity, AGC activity, clock sync and power supply activity.
Two front panel monitor buttons for routing audio directly to the speaker e.g. to take an IFB feed or off-air transmission signal.
Ducking or mixing of inputs to speaker/headphones.
Dual AC & DC power supply inputs.
Typical Applications
OB truck comms, theatre comms, inter-studio comms in a TV or radio station.
Product Category
Talkback, Intercom & Control
Technical Specifications
Audio-Over-IP Specification
Open Standards: RAVENNA, AES67
Device Discovery: Bonjour (mDNS / DNS-SD)
Audio Delivery: RTP/UDP over IPv4 multicast
QoS: DiffServ
Stream Management: RTSP/SDP
Control: Ember+/webserver
Format: Linear PCM 24-bit (L24)
Channels Per Stream: 2
Frames Per Packet: 48
Maximum Streams: RX 6, TX 5 (fixed)
Sample Rate: 48 kHz
Timing Synchronisation
Profile Support: Default, media & custom profiles
Timing Protocol: PTPv2, IEEE1588-2008
Technical Specification
Microphone and Headset Input
Input Impedance: >2.5kΩ balanced
Gain Range: 0dB to +60dB
0dBFS Line-Up: Adjustable in steps of 3dB from -58dBu to +2dBu
Frequency Response: 20Hz to 20kHz, +0/-0.2dB
Noise: -127dBu, 20kHz BW, Rs=200Ω ref. 76dB gain
Unbalanced Line Inputs
Input Impedance: >20kΩ
0dBFS Line-Up: +12dBu
Frequency Response: 20Hz to 20kHz, +0/-0.2dB
THD+N: <-97dBFS, -30dBFS, 20Hz to 20kHz, unity gain, 20kHz BW
Noise: -100dBFS, 20kHz BW, Rs=200Ω
Crosstalk: <-97dB
Balanced Line Inputs
Input Impedance: >20kΩ balanced
0dBFS Line-Up: Adjustable +15/+18/+20/+22/ +24dBu
Frequency Response: 20Hz to 20kHz, +0/-0.2dB
THD+N: <-110dBFS, -30dBFS, 20Hz to 20kHz, 20kHz BW
Noise: -110dBFS, 20kHz BW, Rs=200Ω
Crosstalk: <-100dB
Common Mode Rejection: >70dB @ 1kHz
Headphone Output
Output Impedance: Drives 150mW into 32Ω to 600Ω headphones
0dBFS Line-Up: +20dBu
Frequency Response: 20Hz to 20kHz, +0/-0.2dB
THD+N: <-108dBFS, -30dBFS, 20Hz to 20kHz, unity gain, 20kHz BW
Noise: -110dBFS, 20kHz BW
Unbalanced Line Outputs
Output Impedance: <50Ω
0dBFS Line-Up: +12dBu
Frequency Response: 20Hz to 20kHz, +0/-0.2dB
THD+N: <-95dBFS, -30dBFS, 20Hz to 20kHz, unity gain, 20kHz BW
Noise: -100dBFS, 20kHz BW
Balanced Line Outputs
Output Impedance: <50Ω balanced
0dBFS Line-Up: Adjustable +15/+18/+20/+22/ +24dBu
Frequency Response: 20Hz to 20kHz, +0/-0.2dB
THD+N: <-110dBFS, -30dBFS, 20Hz to 20kHz, 20kHz BW
Noise: -110dBFS, 20kHz BW, Rs=200Ω
Loudspeaker
Power Output: 4W
Volume: Mute to full volume via front panel control
