Overview
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 20 illuminated key-cap talk buttons, including a phone button for remote dialling and control of an external telephone hybrid. It also has a page button and group talk facilities, as well as a callback button with callback source display and three user definable buttons. The front panel display provides source and destination information, and the intercom has advanced echo cancellation and mic AGC to prevent acoustic feedback. It also has dual 1Gb LAN ports and a 1Gb SFP fibre port, as well as 10 user assignable GPIO ports and front panel LEDs for network audio presence, talk activity, AGC activity, clock sync, and power supply activity.
The AVN-TB20AD also has a webserver for setup and configuration, which is responsive and can be accessed on various devices. It uses RAVENNA/AES67 as the audio transport mechanism, allowing for simple CAT 5 cabling and expansion. This intercom is designed for use in studios, stages, theatres, offices, and other areas within a facility or building complex, aiding communication through both 4-wire and AoIP sources and destinations.
Included in box
1x AVN-TB20AD Intercom
1x 150W DC Power Supply with KPJX-4S plug
About the Sonifex AVN-TB20AD Intercom
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.
Webserver Software:
Each AVN-TB talkback unit has a built-in webserver for setup and configuration. The webserver is responsive, and resizes depending on the size of your screen, meaning that it can be used on large monitors or small handheld devices such as smart-phones. Help information is shown on the right hand side of the screen so it’s a good place to go to find out how the unit operates.
Talkback Intercoms Using Audio Over IP, RAVENNA/AES 67:
The new range of AVN (Audio/Video/Network) talkback/listening/paging intercoms aid communication between studios, stages, theatres, offices and different areas in a facility or building complex. They have both 4-wire and AoIP sources and destinations, and use RAVENNA/AES67 as the audio transport mechanism, allowing simple CAT 5 cabling and expansion.
Audio-Over-IP Specification
Open Standards: RAVENNA, AES67
Device Discovery: Bonjour (mDNS / DNS-SD) & SAP
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 25, TX 5 (fixed)
Sample Rate: 48 kHz
Timing Synchronisation
Profile Support: Default, media & custom profiles
Timing Protocol: PTPv2, IEEE1588-2008
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
Connections
Microphone: XLR-3 pin female (electronically balanced)
Headphone: ¼ inch (6.35mm) stereo jack socket
Headset: 2 x XLR-5 pin female (front/rear electronically balanced input)
Audio Inputs: 2 x unbalanced stereo, RCA phono
1 x S/PDIF, RCA phono
Audio Outputs: 1 x balanced stereo, RJ45
1 x unbalanced stereo, 2 x RCA phono
1 x loudspeaker output
Audio Input/Output: 1 x balanced stereo input or mono input/output, RJ45
GPIO: 15-way ‘D’-type socket
Network: 2 x gigabit Ethernet, RJ45
1 x SFP fibre
Mains AC Input: Universal filtered IEC, continuously rated 85-264VAC, 47-63Hz, 20W
DC Input: 4 pin 7.5A power jack socket, 9.5-14VDC
Fuse Rating: Anti-surge fuse 2A 20mm x 5mm
Equipment Type
AVN-TB20AD: 20 channel desktop talkback intercom control unit with RAVENNA AoIP
Physical Specification
Dimensions: (Raw) 29.4cm (W) x 16.5cm (D) x 8.5cm (H)(2U)
11.6” (W) x 6.5” (D) x 3.3” (H) (2U)
Dimensions (Boxed): 40cm (W) x 28cm (D) x 15cm (H)
16” (W) x 11” (D) x 5.9” (H)
Weight: Nett: 2.5kg Gross: 3.2kg
Nett: 5.5lbs Gross: 7.0lbs
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
GPI/O 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
