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Review Summary
Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.
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Black/Silver with silver legends on the front, white legends on the back
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
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
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
Operating: 32 to 104 Degree F (0 to 40 Degree C)
Storage: -4 to 158 Degree F (-20 to 70 Degree C)
3.12" High Resolution OLED display with selections via buttons. Hosted Web page. Remote control and monitoring
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
FCC, RoHS3, WEEE, Industry Canada
72.1-75.9 MHz , 17 wideband channels (selectable)
+/- 2 ppm stability, 0-50 Degree C
+/- 75 kHz maximum
75 microsec
Does not exceed 80 mV/m at 3 m
ANT 005, ANT 021, ANT 024, or ANT 025
Up to 1000' (304m) with ANT 005 coaxial antenna mounted on rear chassis connector
(1x) 10-32 stud connector in center of unit (pcb mounted)
(1x) F-connector on rear chassis
1 Green LED On Air Indicator
Full, Medium, Low or OFF indiacted by menu icon.
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
DSP based
Compression: 1:1, 1.5:1 or 2:1
High-pass and Low-pass Filter Frequency control
31-16000 Hz, +/-3 dB (re: 1 kHz, +/-3 dB) ("Music" Audio Preset)
67 dB (typical) Transmited RF
Less than 0.25% @ 1 kHz (RF output)
Greater than 57 dB @ 1 kHz, Mic or Line
(1x) Combination 3-pin XLR, 1/4" (TRS) jack for balanced or unbalanced line level, or balanced or unbalanced microphone with selectable phantom power
In menu, adjustable to 0 to -50 dB, in 1dB steps
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
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
1/4" TRS stereo jack, mono signal, 14.85 mW at +9dB, maximum in 33 O (level adjustable in menu 0 to -40 dB in 2 dB steps)
RCA jack (black), -10 dBV (.32 VRMS)
Output impedance 100 Ohms at +9dB
Nominal (1st Amber LED): -55 dBV (1.7 mV RMS)
Overload Warning (Displayed on Screen): -15 dBV (180 mV RMS)
Absolute Max. Rating: +20 dBV (10.0 V RMS)
Nominal (1st Amber LED): -25 dBV (55 mV RMS)
Overload Warning (Displayed on Screen): +16 dBV (6.3 V RMS)
Absolute Max. Rating: +20 dBV (10.0 V RMS)
8.45 x 8.25 x 1.72" (21.5 x 21 x 4.4cm)
3.2 lb (1.45kg)
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.
52 mA nominal
32 - 122 Degree F (0 to 50 Degree 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
75 kHz
75 microS
1" OLED
Power button, backlit green. Good battery strength - glows solid. Low battery -flashes
2 microV at 12 dB Sinad with squelch defeated
100 mV
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 Ohm
3.5mm stereo jack, mono output for stereo or mono earphones/headphones
Stereo,earbud-type with foam cushion, 3.5 mm plug, 32 O
Enters sleep mode after approximately 3 minutes of no RF signal
FCC, Industry Canada, RoHS, WEEE
4.1 x 2.85 x 1.38" (104 x 72 x 35mm)
4.6 oz (130g) (With batteries)
2.6 oz (73g) (Without batteries)
Around-ear speaker
3.5mm mono
39" (99.06cm)
23mm
32 Ohm
20 - 20 kHz
30 mW
118 dB @ 1kHz
0.5 oz (15g)
Black
18.5" (46.9cm)
3.5mm mono plug
8-16 Ohms
500 mW max
25 mW input at 1000 Hz produces 1.7 A/m 6" above the center of loop
85microW input produces 0.1 A/m (IEC Standard)
RoHS, WEEE
1.5 oz (42.5g)
10.37 x 6.25 x 0.13" (26.3 x 15.8 x 0.31cm)
Experience unparalleled auditory assistance with the FM 558-12 Plus Large Area Dual FM and Wi-Fi Assistive Listening System, a cutting-edge solution designed to cater to the auditory needs of individuals in expansive environments such as auditoriums, lecture halls, and public spaces. This system seamlessly integrates the professional-grade WaveCAST Wi-Fi audio server technology with the trusted Williams Sound FM assistive listening system, offering users the flexibility to choose between traditional FM receivers or their own smartphones via the WaveCAST Listening App.
The FM T55 Transmitter lies at the heart of this system, boasting a professional digital audio (DSP) platform that ensures exceptional audio quality. Although this version is not Dante compatible, the FM Plus is engineered to support a wide array of devices, including all current and legacy Williams Sound FM receivers operating on the 72-76 MHz bandwidth. The system's user-friendly interface, accessible through both a front panel and a hosted web interface, allows for straightforward configuration. The WaveCAST app, compatible with both iOS and Android devices, provides an intuitive user experience, enabling listeners to effortlessly select channels and adjust volume levels once connected to the Wi-Fi network.
The package includes 12 PPA R38N Receivers, each featuring a high-resolution OLED screen for quick status checks and immediate access to user settings. These receivers offer on-screen channel selection from 17 pre-set, wideband frequencies (72-76 MHz) and are digitally synthesized for exceptional audio clarity and stability. The digital tuning, digital squelch, and battery-saving sleep mode enhance the user experience, while the new stereo jack, alongside the mono jack, ensures compatibility with a broad range of earphones and headphones.
Listeners will appreciate the EAR 022 Surround Earphone, an around-ear speaker earphone that hangs comfortably outside the ear, delivering excellent sound quality. These earphones are compatible with all Williams Sound receivers and Pocketalkers, having undergone rigorous testing to ensure quality, reliability, and compatibility.
For those with T-Coil-equipped hearing aids, the NKL 001 Neckloop offers an optimal solution. This neckloop magnetically couples the audio output from any Williams Sound unit or audio device with an 8-16 Ohm output through a 3.5mm jack. The integrated safety breakaway feature ensures user safety, disconnecting the neckloop in the event of entanglement.
Lastly, the IDP 008 ADA Wall Plaque signifies your commitment to accessibility. This self-adhesive, easy-to-see wall plaque informs patrons that your establishment is equipped with a hearing assistance system, making it an essential addition to venues prioritizing inclusivity.
The FM 558-12 Plus Large Area Dual FM and Wi-Fi Assistive Listening System is a testament to high-quality, advanced, innovative, durable, and user-friendly design, making it an exceptional choice for those seeking reliable auditory assistance in large venues.