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Ward-Beck  AMS4-1AA
4 Channel Audio Monitoring System
List: $1,195.00 Log In For Your BEST PRICE
The AMS4 is a versatile audio monitoring system that can be used to monitor analog audio, AES digital audio and SDI embedded audio.The SDI demuxer may be added as an option.

Versions of the AMS4 Available:
AMS4-1AA: 4 Stereo Analog, 4 75 Ohm, & 4 110 Ohm AES/EBU inputs
AMS4-1AAM: 4 Stereo Analog Inputs, 4 AES/EBU inputs 75 Ohm and 110 Ohm, & Dual Input 3G/HD/SD SDI Demuxer

The AMS4 features an 8 x 1 input switcher (four analog sources, four AES sources) with auto recognition of 75 or 110 Ohm AES signals. A direct balanced stereo analog audio output of the switcher is available on the rear panel. A ten LED stereo VU meter and phase indicator is included. The AMS4 offers full range acoustic monitoring and may be muted via external control.

Two front panel push button switches , MODE and SOURCE, and a dot matrix LED readout allows the user to select the source to be monitored.The MODE switch steps through analog, AES digital and SDI modes while the SOURCE switch selects the input from that group.Use A1 through A4 for analog, D1 through D4 for AES and SD1 through SD8 for embedded signals. On power down, the last selection is stored in memory.

If a signal is lost or corrupted in the AES digital and SDI modes, the display will alternate between the source selection and the letters NL, signifying no lock. In the SDI mode, a flashing number in the source ID code signifies that embedded audio is not present.

The AMS4 will automatically detect whether the AES/EBU digital signal is balanced (110 Ohms) or unbalanced (75 Ohms). In the event that both a balanced and unbalanced signal is connected simultaneously to the same AES input, random selection between the two sources will occur.

A convenient front panel mounted TRS headset jack is provided.The speaker feeds are normalled through this jack to automatically mute the speakers when a headset is plugged in.

Connections to the AMS4 are made on convenient pluggable screw terminals for the balanced analog and digital AES inputs and outputs. The unbalanced digital audio inputs and SDI inputs are made on 75 Ohm BNC connectors.

The EXT MUTE IN requires a closure to ground to mute the monitor. Once muted, the display window of the AMS4 will alternate between the selected source ID and the word MUTE. The open collector output EXT MUTE TALLY pin will be activated. Connections to the external mute control and tally are available on a pluggable screw terminal, located on the rear panel.

Input AES/EBU 110 Ohm: Transformer balanced screw terminal
Input 75 Ohm: Unbalanced BNC
Input Level: 0.2-5V p-p
Sampling Frequency Range: 30kHz to 50kHz
Meter Level: 0VU = -20dBFS (or specify when ordering)

Input Impedance: >20k Ohm balanced
Input Level: +24dBu max
Meter Level: 0VU = +4dBu (or specify when ordering)

Input Impedance: 75 Ohm
Input Level: 0.8 Vp-p (typical)
Output Level: 0.8 V p-p
Output Impedance: 75 Ohm
Return Loss: 18 dB
Data Rate: 270 Mbps

Open Collector Output: 10 Ohm 24V 25 mA MAX
Power Requirements: 115V AC/60Hz 25VA, or 230V AC/50Hz
Dimensions: 19" w x 13/4" h x 103/4" d (483mm x 44mm x 273 mm)
Weight: 4.5kg (10 lbs)
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#6 1555 Dublin Ave. | Winnipeg, Manitoba R3E 3M8 | 
P:(204)775-4467 | F:(204)775-4503 | T:800-665-0501 |