Name: Williams AV FM+ 557 PRO System | 4 Receivers & Install Accessories
Brand: WilliamsSound
Price: 2715.00 USD
Availability: InStock

The FM+ 557 PRO system is a turnkey assistive listening solution with installation accessories. It includes an FM+ dual FM and Wi-Fi transmitter, four R37 receivers, a coax cable, and a rack panel kit for professional setup. The transmitter features DSP audio processing and integrates with third-party controls via Telnet over Ethernet.

R37 receivers offer easy tuning across 17 wideband frequencies (72.1-75.9 MHz) and support unlimited listeners. The system includes earphones, neckloops, a charging station, and an ADA sign for venues to promote assistive listening availability. Ordered as part number TMP-FM557PRO. Published dimensions, power and warranty are in the specifications tab.

Part Number	TMP-FM557PRO
Category	FM Systems, ProAV
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 1-2 units can be mounted in a single rack space with optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits
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 deg F to +122 deg F (0 deg C to 50 deg C); Storage: -4 deg F to +158 deg F (-20 deg C to 70 deg C)
Capacity	37 receivers
Brand	Williams AV