WILLIAMS AV FM 557-12 PRO FM Plus Large-Area Dual FM/Wi-Fi Assist Listen System with 12 FM R37 Receivers FM-557-12PRO WLS-FM-557-12PRO

Williams FM-557-12PRO is a Large-area Dual FM and Wi-Fi assistive listening system with 12 FM R37 receivers. Features coaxial cable and rack panel kit for professional installation.

Features:

• Seek-button access to all 17 wideband frequencies in the 72-76 MHz bandwidth
• Channel-lock capability
• Battery-saving sleep mode
• Low-battery indicator
• Field tunable

Specifications:

• Dimensions: 8.45" W x 8.25" D x 1.72"H (21.5 cm x 21 cm x 4.4 cm)
• Weight: Transmitter: 3.2 lbs (1.45 kg)
• Color: Black/Silver with silver legends on the front, white legends on the back
• Rack Mount: Standard 19" Rack, one EIA rack space high, 1/2 space wide.
• Power Supply: Desktop Style Transformer (TFP 062); Input: 100-240 VAC, 50/60 Hz. IEC Line Cord; Output: 24 VDC, 750 mA, 18W. 2.5mm ID center positive barrel connector
• Power ON Indicator: Push On/Push Off latching power button, backlit green indicates power ON, backlight off indicates power OFF, fading from bright to dark indicates Sleep Mode.
• Temperature Range: Operating: +32° F to +122° F (0° C to 50° C); Storage: -4° F to +158° F (-20° C to 70° C)
• User Interface: 3.12" High Resolution OLED display with selections via buttons. Hosted Web page. Remote control and monitoring.
• Dante: Only available on FM T55 D
• Ethernet: RJ-45 on back of unit supports CAT 5e cable lengths up to 328 feet (100 meters); 10/100 Base-T IEEE 802.3 compliant, unique MAC address
• RF Section
• Operating Frequencies: 72.1-75.9 MHz , 17 wideband channels (selectable)
• Frequency Accuracy: ± 2 ppm stability, 0-50° C
• Deviation: ± 75 kHz maximum
• Pre-Emphasis: 75 microsec
• RF Field Strength: Does not exceed 80 mV/m at 3 m
• Compatible Antennas: ANT 005, ANT 021, ANT 024, or ANT 025
• Transmission Range: Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector
• RF Outputs: (1x) #10-32 stud connector in center of unit (pcb mounted) (1x) F-connector on rear chassis
• RF Transmit Indicator: 1 Green LED On Air Indicator
• RF Power: Full, Medium, Low or OFF indiacted by menu icon.
• RF Time Out (sleep mode): 30 min. duration, 4 hr. duration, or Always On selected via menu. Starts when audio is below -18 dB level with no button pressed for selected duration.
  
  Audio Section
• Audio Processor Functions: DSP based; Compression: 1:1, 1.5:1 or 2:1; High-pass and Low-pass Filter Frequency control
• Frequency Response: 31-16000 Hz, ±3 dB (re: 1 kHz, ±3 dB) ("Music" Audio Preset)
• Signal-to-Noise Ratio: 67 dB (typical) Transmited RF
• Total Harmonic Distortion: Less than 0.25% @ 1 kHz (RF output)
• Common Mode Rejection: Greater than 57 dB @ 1 kHz, Mic or Line
• Audio Inputs: (1x) Combination 3-pin XLR, 1/4" (TRS) jack for balanced or unbalanced line level, or balanced or unbalanced microphone with selectable phantom power
• Audio Input Gain Adjust: In menu, adjustable to 0 to -50 dB, in 1dB steps
• Phantom Power: 14.4 VDC applied through 2.2 kOhms resistors to analog combo jack: Pin 2 and Pin 3 on XLR jack, or tip and ring on 1/4" TRS jack
• Audio Level Indicators: 10-LED?array that reads -18 to +9 dB at 3 dB intervals. 7 Green, 2 Amber, and 1 red LED. Green LEDs indicate normal operating audio level peaks, Amber LEDS indicate close to overload peaks, Red LED indicates overload peaks
• Headphone Output: 1/4" TRS stereo jack, mono signal, 14.85 mW at +9dB, maximum in 33 Ω (level adjustable in menu 0 to -40 dB in 2 dB steps)
• Line Output: RCA jack (black), -10 dBV (.32 VRMS); Output impedance 100 ohms at +9dB
• Input Levels (Bal or Unbal) (at Audio Input Gain = 0dB): Nominal (1st Amber +3 dB LED): Overload Warning (Displayed on Screen): Absolute Max. Rating*
• Microphone: -55 dBV (1.7 mV RMS): -22 dBV (80 mV RMS): +20 dBV