Replaces the FM 458.
FM Plus Large-area Dual FM and Wi-Fi assistive listening system with 4 FM R38 receivers.
(1) FM T55 transmitter
(4) PPA R38N receivers
(4) EAR 022 surround earphones
(2) NKL 001 neckloops
(1) IDP 008 ADA wall plaque
20 – 20kHz
Max Power Input
118 dB @ 1kHz
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.
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° 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
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 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 + 3dB LED) Overload Warning (Displayed on Screen) Absolute Max. Rating*
-55 dBV (1.7 mV RMS) -22 dBV (80 mV RMS) +20 dBV (10.0 V RMS)
-25 dBV (55 mV RMS) +16 dBV (6.3 V RMS) +20 dBV (10.0 V RMS)
Approvals FCC, RoHS3, WEEE, Industry Canada
Warranty 2-year parts and labor
NOTE: Specifications are subject to change without notice.
* Stresses above these ratings may cause permanent damage or degrade reliability.
10-3/8″ (L) x 6-¼” (W) x 1/8″ (H)
ppa r38n architectural and engineering specifications
The 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 jack to accommodate stereo or mono low impedance earphones, headphones and neckloops. The receiver shall have a power button that is backlit indicating power is on. The receiver shall receive 17 preset wideband channels between 72-76MHz. Channel selection shall be made in the menu. 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 recevier shall operate up to 50 hours with two disposable AA Alkaline batteries (BAT 001-2) and up to 32 hours with two AA NiMH rechargeable batteries (BAT 026-2).
The receiver shall provide a maximum output of 35mW at 16Ω 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 receiver shall accept up to ±75kHz FM deviation and have a 75 µS de-emphasis time constant.
The receiver 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, 90 Days on most accessories.
This receiver model shall be the Williams Sound model PPA R38N.
4.1″ x 2.85″ x 1.38″ (104 x 72 x 35mm)
4.6oz (130g) with batteries. 2.6oz (73g) without batteries
Black/Silver. Black ABS Plastic case with Aluminum faceplate.
(2) AA Alkaline or (2) AA NiMH Rechargeable
(2) AA non-rechargeable alkaline batteries (BAT 001-2), approx. 50 hrs.
(2) AA rechargeable NiMH batteries (BAT 026-2), 1500mAh, approx. 32 hrs.
Operating Temp. Range:
32° – 122°F (0° to 50°C)
17 Wideband, accessed via menu
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*
Power button, backlit green.
Good battery strength – glows solid. Low battery – flashes.
2 µV at 12 dB Sinad with squelch defeated
200 Hz – 15 kHz, ±3dB
FM, +/- 75 kHz peak deviation
Minimum 65 dB @ 1.0V
Integral with earphone/headphone cord
35 mW max at 16 Ω
3.5 mm stereo jack, mono output for stereo or mono earphones/headphones
Stereo,earbud-type with foam cushion, 3.5 mm plug, 32 Ω
Power Save Mode:
Enters sleep mode after approximately 3 minutes of no RF signal
FCC, Industry Canada, RoHS, WEEE
Lifetime PLUS Limited Warranty, 90 Days on most accessories.