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Description
Williams AV FM 557 PRO D WAP Large-Area Dual FM/Wi-Fi Assistive Listening System With 4 FM R37 Receivers (DANTE)The FM Plus 557 assisted listening system now with integrated Wi Fi has replaced the existing 457 systems for public venues. The FM 557 Plus 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 TT55 transmitter (replacing the T45 FM transmitter) with multiple digital audio input options and an OLED display with easy to manage navigation, and network
The FM Plus 557 assisted listening system – now with integrated Wi-Fi – has replaced the existing 457 systems for public venues. The FM 557 Plus 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 TT55 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 seekbutton 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. This kit comes with a Wireless Access Point.
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
- (1) WF WR10 Wireless Access Point.
Specifications
- Warranty - Yes
- Spec Sheet available - Yes
- Regulatory Compliance: 2.4GHz: IEEE802.11n, IEEE802.11g, IEEE 802.11b; 5.xGHz: IEEE 802.11n, IEEE 802.11a; 802.11ac IEEE802.3, IEEE802.3u, IEEE802.3ab
- Warranty (Length/Type): 3 Years
- Minimum Frequency Response (Bandwidth): 20 Hz
- Minimum Frequency Response (Bandwidth): 0.02 kHz
- Maximum Frequency Response (Bandwidth): 20000 Hz
- Maximum Frequency Response (Bandwidth): 20 kHz
- Signal to Noise Ratio: 65 dB
- Operating Temperature (Maximum): 122 F
- Operating Temperature (Minimum): 32 F
ANT 005
- Use with: PPA T45,PPA T45NET, 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
EAR 022
- Style: Around-ear speaker
- Plug: 3.5mm mono
- Cord: 39"
- Driver Size: 23 mm
- Nominal Impedance: 32Ohm
- Freq. Response: 20 - 20kHz
- Weight:15g
- Max Power Input: 30 mW
- Sensitivity: 118 dB @ 1kHz
PPA R37N
- 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
- Battery Type: (2) AA Alkaline or 2 x AA NiMH
- Battery Life: Two (2) AA non-rechargeable alkaline batteries (BAT 001), approx. 50 hrs
- (2) AA rechargeable NiMH batteries (BAT 026), 1500 mAh, approx. 32 hrs
- Current Consumption: 52mA nominal
- Channels: 17, accessed via seek button in battery compartment
- 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*
- Intermediate Freq.: 75 kHz
- FM Deviation: 75 kHz
- De-Emphasis: 75 µS
- LED Indicator: Power: Green; Low Battery: Flashes Green
- AFC Range: ± 120 kHz
- Sensitivity: 2 µV at 12 dB Sinad with squelch defeated
- Input Overload: 100 mV
- Frequency Response: 200 – 15 kHz
- Modulation: FM, +/- 75 kHz peak deviation
- Signal-to-Noise Ratio: 65 dB min @ 100 uV
- Receive Antenna: Integral with earphone/headphone cord
- Audio Output: 35 mW max, peak into 16 ohms
- Output Connector: 3.5 mm stereo/mono phone jack
- Earphone: Earbud-type with foam cushion, 3.5 mm plug, 32 Ohm
- Auto Shut-off: Enters sleep mode after approx 6 mins 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
4.2 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Amazing
Size: 18-22 2.0L
Great quality and the price is amazing!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 5
It works and fits
Size: 14-22 2.0L hybrid
Worked perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
Beautiful
Size: 18-22 1.5L
I love it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 5
Great quality Cabin and air filter bundle pack. Very solid quality.
Size: 18-22 1.5L, Size: 18-22 1.5L
First off, I like that it's a combo pack instead of me having to buy each one individually and being able to change both at the same time. Now, I must say the quality of both of them is fantastic; I'm really impressed. It's not made out of cheap junk; it feels solid and seems like it will do a good job filtering out all the debris and dirt. It was extremely easy to install and fit perfectly like an OEM air filter and cabin air filter on my Honda Accord. The cabin air filter is definitely a solid piece, and you don't have to worry about it getting crushed or deforming as it's padded, I would assume the reason for the padding on the side of the cabin air filter is that no debris or dust sneaks through which gives it a snug fit which is very smart honestly. The same applies to the air filter that goes under the hood; it definitely feels like a quality piece.
A quality filter definitely keeps outside odors and smells from coming inside the cabin, allowing you to get fresh, clean air when you turn your AC on.
Overall, definitely a solid purchase, and I will definitely be back to buy this exact bundle pack in the future as it's well-built and fits like a glove. So, you're definitely getting great value for your money with this specific engine and cabin air filter combo pack.
There are a lot of garbage ones out there, so if it were flimsy and felt like a cheap filter, I would be giving this one or two stars. But I'm actually quite impressed with this company, and it seems to be doing a fine job. My AC does work better after installing these new filters, and of course, the car runs better with the air filter installed.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Good Fit & Quality
Size: 14-22 2.0L hybrid, Size: 14-22 2.0L hybrid
This set which includes both the engine and cabit air filters are of good quality and fits my 2020 Honda Accord Hybrid well. The engine filter feels sturdy and well built. The cabin filter, although without charcoal infusion, has many folds which is more important when it comes to effective filtering of particles. The installation was easy and for the set, this set offers a good value.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
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