Product Description
Williams Sound FM 557 PRO Dual FM and Wi-Fi Assistive Listening System
Replaced FM 457 PRO.
The FM 557 assisted listening system – now with integrated Wi-Fi – has replaced the existing 457 systems for public venues. The FM 557 offers both FM and Wi-Fi transmission from the same box for nearly the same cost as traditional FM systems.
This system features the cutting edge PPA T55 transmitter (replacing the T45 FM transmitter) with multiple digital audio input options and an OLED display with easy-to manage navigation, and network control features.
This complete turnkey solution includes 4 PPA R37N receivers, each featuring seek button channel selection with access to 17 selectable wideband frequencies between 72.1-75.9MHz. The bundle includes a coax cable and rack panel kit for professional installation. The system is expendable, accommodating any number of listeners. This system complies with 2010 ADA guidelines for hearing assistance and is covered by Lifetime PLUS limited warranty.
The PRO version features coaxial cable and rack panel kit for professional installation.
System Includes:
- (1) FM T55 transmitter
- (4) PPA R37N receivers
- (4) EAR 022 surround earphones
- (2) NKL 001 neckloops
- (2) BAT KT6 two-bay chargers and rechargeable batteries
- (1) ANT 005 remote coaxial antenna
- (1) IDP 008 ADA wall plaque
- (1) RPK 005 rack panel kit
Note: The FM + connects to the installation location’s Wi-Fi Network. It does not provide a network on its own. The Wi-Fi network will need to be installed and established before the FM + can be used.
Specs
FM 557 PRO
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Dimensions |
8.45″ W x 8.25″ D x 1.72″H (21.5 cm x 21 cm x 4.4 cm) |
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Weight |
Transmitter: 3.2 lbs (1.45 kg) |
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Color |
Black/Silver with silver legends on the front, white legends on the back |
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Rack Mount |
Standard 19” Rack, one EIA rack space high, 1/2 space wide |
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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 |
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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. |
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Temperature Range |
Operating: +32° F to +122° F (0° C to 50° C); Storage: -4° F to +158° F (-20° C to 70° C) |
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User Interface |
3.12” High Resolution OLED display with selections via buttons. Hosted Web page. Remote control and monitoring. |
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Dante |
Only available on FM T55 D |
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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 |
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RF Section |
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Operating Frequencies |
72.1-75.9 MHz , 17 wideband channels (selectable) |
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Frequency Accuracy |
± 2 ppm stability, 0-50˚ C |
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Deviation |
± 75 kHz maximum |
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Pre-Emphasis |
75 microsec |
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RF Field Strength |
Does not exceed 80 mV/m at 3 m |
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Compatible Antennas |
ANT 005, ANT 021, ANT 024, or ANT 025 |
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Transmission Range |
Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector |
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RF Outputs |
(1x) #10-32 stud connector in center of unit (pcb mounted) |
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RF Transmit Indicator |
1 Green LED On Air Indicator |
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RF Power |
Full, Medium, Low or OFF indiacted by menu icon. |
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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. |
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Audio Section |
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Audio Processor Functions |
DSP based; Compression: 1:1, 1.5:1 or 2:1; High-pass and Low-pass Filter Frequency control |
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Frequency Response |
31-16000 Hz, ±3 dB (re: 1 kHz, ±3 dB) (“Music” Audio Preset) |
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Signal-to-Noise Ratio |
67 dB (typical) Transmited RF |
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Total Harmonic Distortion |
Less than 0.25% @ 1 kHz (RF output) |
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Common Mode Rejection |
Greater than 57 dB @ 1 kHz, Mic or Line |
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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 |
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Audio Input Gain Adjust |
In menu, adjustable to 0 to -50 dB, in 1dB steps |
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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 |
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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 |
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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) |
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Line Output |
RCA jack (black), -10 dBV (.32 VRMS); Output impedance 100 ohms at +9dB |
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Input Levels (Bal or Unbal) (at Audio Input Gain = 0dB) |
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Microphone |
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Line |
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Approvals |
FCC, RoHS3, WEEE, Industry Canada |
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Warranty |
2-year parts and labor |
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ANT 005
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Use with |
PPA T45,PPA T45NET, PPA T27 Transmitters |
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Connector type |
F-connector |
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Cable type |
RG 59 coax |
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Nominal Impedance |
75 Ohm |
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Total Cable Length |
22 ft |
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Active Antenna Length |
80 in |
EAR 022
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Style |
Around-ear speaker |
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Plug |
3.5mm mono |
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Cord |
39" |
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Driver Size |
23 mm |
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Nominal Impedance |
32Ω |
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Freq. Response |
20 - 20kHz |
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Weight |
15g |
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Max Power Input |
30 mW |
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Sensitivity |
118 dB @ 1kHz |
IDP 008
10-3/8" (L) x 6-¼" (W) x 1/8" (H)
PPA R37N architectural and engineering specifications
- The PPA R37 receiver shall be encased in black, PC/ABS impact-resistant plastic with a hinged battery door. The receiver shall be a body-pack style and include a detachable belt-clip for hands-free operation. The receiver shall have a 3.5mm stereo/mono jack to accommodate stereo or mono low impedance earphones, headphones and neckloops. The receiver shall have a combination volume control with power on/off rotator dial. It shall have a green LED indicating battery and system status codes. The R37 shall have access to 17 preset wideband channels between 72-76MHz. Channel selection shall be made by pushing the seek button inside the battery compartment. The receiver shall have channel-lock capability.
- The receiver shall have a slide switch inside the battery compartment to select disposable Alkaline or NiMH rechargeable battery operation. It shall have charger contacts on the bottom of the receiver for use with Williams Sound drop-in chargers CHG 3512 and CHG 3502. The R37 shall operate up to 50 hours with two disposable AA Alkaline batteries and up to 32 hours with two AA NiMH rechargeable batteries (BAT 026).
- The receiver shall provide a maximum out of 35mW at 16ø with an earbud type earphone. The systems audio frequency response shall be 200Hz to 15kHz ± 3dB and the signal to noise ratio shall be 65dB min. The receiver sensitivity shall be 2μV or better at 12dB Sinad with squelch defeated. The R37 shall accept up to ±75kHz FM deviation and have a 75 μ s de-emphasis time constant.
- The R37 shall have FCC, Industry Canada approvals and be compliant with RoHS and WEEE regulations. The receiver shall be covered by a Lifetime PLUS Limited Warranty, excluding earphones, headphones and batteries.
- This receiver model shall be the Williams Sound model PPA R37.
PPA R37N
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Dimensions: |
4.1" x 2.85" x 1.38" (104 x 72 x 35mm) |
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Weight: |
4.6oz (130g) with batteries. 2.6oz (73g) without batteries |
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Color: |
Black |
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Battery Type: |
(2) AA Alkaline or 2 x AA NiMH |
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Battery Life: |
Two (2) AA non-rechargeable alkaline batteries (BAT 001), approx. 50 hrs |
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(2) AA rechargeable NiMH batteries (BAT 026), 1500 mAh, approx. 32 hrs |
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Current Consumption: |
52mA nominal |
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Temperature Range: |
– 0 to 50C |
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Channels |
17, accessed via seek button in battery compartment |
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Operating Freq.: |
72.1, 72.2, 72.3, 72.4, 72.5, 72.6, 72.7, 72.8, 72.9, 74.7, 75.3, 75.4, 75.5, 75.6, 75.7, 75.8, 75.9 MHz* |
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Intermediate Freq.: |
75 kHz |
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FM Deviation: |
75 kHz |
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De-Emphasis: |
75 µS |
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LED Indicator: |
Power: Green; Low Battery: Flashes Green |
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AFC Range: |
± 120 kHz |
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Sensitivity: |
2 µV at 12 dB Sinad with squelch defeated |
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Input Overload: |
100 mV |
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Frequency Response: |
200 – 15 kHz |
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Modulation: |
FM, +/- 75 kHz peak deviation |
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Signal-to-Noise Ratio: |
65 dB min @ 100 uV |
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Receive Antenna: |
Integral with earphone/headphone cord |
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Audio Output: |
35 mW max, peak into 16 ohms |
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Output Connector: |
3.5 mm stereo/mono phone jack |
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Earphone: |
Earbud-type with foam cushion, 3.5 mm plug, 32 Ω |
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Auto Shut-off |
Enters sleep mode after approx 6 mins of no RF signal |
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Approvals: |
FCC, Industry Canada, RoHS, WEEE |
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Warranty: |
Lifetime PLUS Limited Warranty, 90 Days on most accessories. |
