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Description
Williams AV FM 558-24 PRO FM+ PRO System Package (24 R38 receivers)The FM 558 PRO system package is a complete turnkey solution. It includes 4 PPA R38 receivers and an FM+ transmitter for both FM and Wi Fi transmission from the same box. The PRO bundle includes a coax cable, and rack panel kit for professional installation. 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
The FM 558 PRO system package is a complete turnkey solution. It includes 4 PPA R38 receivers and an FM+ transmitter for both FM and Wi-Fi transmission from the same box. The PRO bundle includes a coax cable, and rack panel kit for professional installation.
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.
Each FM R38 is a multi-channel FM receiver with a high-resolution OLED screen. The receiver comes with earphones and batteries, but is otherwise identical to the PPA R38. The R38 offers a quick view of receiver status and immediate entry to all user settings. On-screen channel selection with easy access to 17 pre-set, wide-band frequencies (72-76 MHz). The system is expandable, accommodating any number of listeners. This system complies with 2010 ADA guidelines for hearing assistance all for nearly the same cost as traditional FM systems.
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 1–2 units can be mounted in a single rack space with optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits |
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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 | |||
| 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
Refer to Williams AV’s Antenna Selection Install Guide for FCC-compliant antennas for this product. |
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| 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 |
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| 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) |
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| Microphone |
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| Line |
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| Approvals | FCC, RoHS3, WEEE, Industry Canada | |||
| Warranty | 2-year parts and labor | |||
ANT 005
| Use with | PPA T45, PPA T55, PPA T55C, PPA T27 Transmitters |
| Connector type | F-connector |
| Cable type | RG 59 coax |
| Nominal Impedance | 75 Ohm |
| Total Cable Length | 22 ft |
| Active Antenna Length | 80 in |
CHG 3512
| Size: | 9.5"L x 7.4"W x 1.7"H (24.1 cm L x 18.8 cm W x 4.3 cm H) |
| Weight: | 1.2 lbs (.54 kg), excluding power supply |
| Color: | Black ABS |
| Power Supply Input: | 90 - 240 VAC input |
| Power Supply: | TFP 037 Switching AC adapter, 5 VDC - 4A output |
| Charging Rate: | 16 Hour Charge: 140 mA Pulse/Maintain: 140 mA |
| Charging Time: | 16 hours nominal |
| Unit Capacity: | 12 Units |
| Indicators: | Individual Charging Indicators: Red LEDs. LEDs blink when batteries are charged |
| Warranty: | 1 year (cables and power supply warrantied for 90 days) |
| Approvals: | CE, WEEE, RoHS |
EAR 022
| Style | Around-ear speaker |
| Plug | 3.5mm mono |
| Cord | 39" |
| Driver Size | 23 mm |
| Nominal Impedance | 32Ω |
| Freq. Response | 20 - 20kHz |
| Weight | 15g |
| Max Power Input | 30 mW |
| Sensitivity | 118 dB @ 1kHz |
NKL 001
| Color: | Black |
| Weight: | 1.5 oz |
| Length: | 18.5” cord |
| Connector: | NKL 001: 3.5 mm mono plug NKL 001-S: 3.5 mm stereo plug with ring disconnected |
| Impedance: | 8-16 Ohms |
| Input Power: | 500 mW max |
| Magnetic Field Strength: | 25 mW input at 1000 Hz produces 1.7 A/m 6” above the center of loop 85μW input produces 0.1 A/m (IEC Standard) |
| Approvals: | RoHS, WEEE |
| Warranty: | One Year |
PPA R38N
| Dimensions: | 4.1" x 2.85" x 1.38" (104 x 72 x 35mm) |
| Weight: | 4.6oz (130g) with batteries. 2.6oz (73g) without batteries |
| Color: | Black/Silver. Black ABS Plastic case with Aluminum faceplate. |
| Battery Type: | (2) AA Alkaline or (2) AA NiMH Rechargeable |
| Battery Life: | (2) AA non-rechargeable alkaline batteries (BAT 001-2), approx. 50 hrs. |
| (2) AA rechargeable NiMH batteries (BAT 026-2), 1500mAh, approx. 32 hrs. | |
| Current Consumption: | 52mA nominal |
| Operating Temp. Range: | 32° – 122°F (0° to 50°C) |
| Channels: | 17 Wideband, accessed via menu |
| Operating Frequencies: | 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* |
| FM Deviation: | 75 kHz |
| De-Emphasis: | 75 µS |
| Display Screen: | 1" OLED |
| Power Indication: | Power button, backlit green. Good battery strength - glows solid. Low battery - flashes. |
| Sensitivity: | 2 µV at 12 dB Sinad with squelch defeated |
| Input Overload: | 100 mV |
| Frequency Response: | 200 Hz – 15 kHz, ±3dB |
| Modulation: | FM, +/- 75 kHz peak deviation |
| Signal-to-Noise Ratio: | Minimum 65 dB @ 1.0V |
| Receive Antenna: | Integral with earphone/headphone cord |
| Audio Output: | 35 mW max at 16 Ω |
| Headphone Connector: | 3.5 mm stereo jack, mono output for stereo or mono earphones/headphones |
| Supplied Earphone: | 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 |
| Approvals: | FCC, Industry Canada, RoHS, WEEE |
| Warranty: | Lifetime PLUS Limited Warranty, 90 Days on most accessories. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Amazing but one problem
Format: Kindle
I LOVE this book but the one problem is that there are curse words. I'm 12 and I'm aware that Stuart Gibbs curses but I feel like in this particular book he cursed a lot more than he
usually does but other than that I absolutely LOVED reading this I will get the whole series for sure! If you already have read this whole series and want to read more I highly recommend spy school ( all of them there are I believe 13 of them) and space case.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 25, 2024
★★★★★ 5
Fun for Kids of All Ages
Format: Paperback
Belly Up is a hit with my 8-year-old son, and even my 14-year-old can’t get enough of it! The story is funny, adventurous, and full of clever twists that appeal to both younger and older readers.
It’s perfect for kids who love animals, mystery, and humor — a book that keeps everyone hooked from start to finish.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2025
★★★★★ 4
LOVE book...but a few swear words....
Format: Paperback
I LOVE this book! I love the plot! But, I would of reviewed this book 5 stars if: First, there are a few swear words throughout the book! As a kid, I find it disappointing to find a couple swear words in a kids book! The swear words, (a**, h***,d***) are used very loosely. I mean come on! Adding those swear words do NOT add to the plot and just make the book a 4 star review. Also, as a devoted Christian, I also find it disappointing that the characters say a couple of things ( God knows...., God....). If you are going to buy this book, I would make sure you're fine with a bit of language and some stuff......The plot is lovely, definitely a mystery book. The book definitely makes you think and get engaged. Finished book in 5 days and want the rest of the series. But if you buy this book, be careful of the swear words. I will read this book again....
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 24, 2021
★★★★★ 5
Good
Format: Hardcover
Good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
Amusing and compelling.
Format: Paperback
Stuart Gibb has written a thoroughly engaging and amusing mystery. Setting this series inside an animal park was a brilliant move and it shows. Teddy makes a great detective as well as a smart aleck, Teddy proves to be determined and unwilling to give up. At first he wants the adults to investigate Henry's murder but when the police turn him away, his mother brushes him off, and the park itself covers it up, Teddy decides it's up to him to investigate. He recruits the help of Summer McCraken, the daughter of the owner of FunJungle and together they manage to wreak havoc as they search for the answers that nobody seems to want them to find. I found myself flying through this book once I got started. It's a great mystery with lots of suspects as well as twists and turns that made it unpredictable and delightful to read. I read this aloud to a bunch of classes and they all loved it. Note: there is a mild amount of what many would consider bad language.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2017
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