Description
ThePFM PRO Personal FM Listening System with Alkaline BatteriesfromWilliams Sounddelivers audio directly to the ear, enhancing sound at home, work, school, or anywhere background noise or distance from the source makes listening difficult. The system features 17 selectable channels on the 72-76 MHz band and has an operating range of up to 150 feet. A 3.5mm jack allows for a variety of earphones and headphone options. The system is also is compatible with neckloops and telecoil-equipped hearing aids.
Specifications
Headphone
| Operating Frequencies | Selectable, 17 channels, 72.1 to 75.9 MHz Switchable 8- or 17-channel mode 8-channel mode setting corresponds with PPA R35-8 receiver channels |
| Stability | 0.005%, frequency synthesized, crystal reference, PLL |
| Modulation | Wide-band FM, 75 kHz peak, 75 s pre-emphasis |
| RF Output | 80 mV/m at 3 m (maximum allowed by FCC rules) |
| Frequency Response | 180 Hz to 13 kHz, 3 dB at 1% maximum THD |
| Signal-to-Noise Ratio | 65 dB (typical), transmitted |
| Antenna | Integral with microphone cord |
| Microphone | Electret type, 3.5 mm mono plug |
| Display | OLED for status and menu information
Status: Channel/Frequency, mic audio level, auxiliary input audio level, battery status, mic mute, channel lock, dual-preset modes Menu: Channel/frequency display mode select, volume, auxiliary input, compression, 17- or 8-channel mode, screen time out, screen brightness, restore default settings |
| External Controls | Momentary Push Button: Push and hold 3 seconds for power on/off, push and release for microphone mute On/Off
Left, right, and menu buttons for accessing and changing transmitter settings Battery type switch (alkaline or NiMH) located behind the battery compartment door |
| Indicators | Power LED: Green, flashes when battery is low |
| Mic Input | 3.5 mm mono jack with electret mic bias, adjustable gain with 25 dB range |
| AUX Input | 2.5 mm stereo jack, adjustable gain with 60 dB range |
| Audio Compression Method | 1:1 (Off) or 2:1 (On) selectable in menu |
| Battery Type | 2 x AA 1.5 V BAT 001-2 non-rechargeable alkaline batteries, 75 mA nominal current drain, up to 30 hours battery life Or 2 x AA 1.5 V BAT 026-2 NiMH rechargeable batteries, 75 mA nominal current drain, up to 20 hours battery life per charge, recharges in 14 to 16 hours, uses CHG 3502 or CHG 3512 Charger (sold separately) |
| Enclosure Material | Shatter-resistant PC/ABS plastic with textured scratch-resistant aluminum faceplate |
| Dimensions | 4.1 x 2.8 x 1.1″ (104.1 x 71.1 x 27.9 mm) |
| Weight | 2.6 oz (73.7 g) without batteries |
Williams Sound PPA R37 Select Channel FM Receiver With Earphone
Headphone
| Channels | 17, Accessed via Seek Button in Battery Compartment |
| Operating Frequency | 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, 75.9MHz 75kHz Intermediate Frequency |
| Deviation | 75kHz |
| De-Emphasis | 75S |
| Range | AFC Range: 120kHz |
| Sensitivity | 2V @ 12dB Sinad with Quelch Defeated |
| Max Input Signal | 100mV |
| Frequency Response | 200Hz – 15kHz |
| Modulation | FM, 75kHz Peak Deviation |
| Signal to Noise Ratio | 65dB Min @ 100V |
| Output Level | 35mW Max, Peak into 16 Ohms |
| Connectors | 3.5mm Stereo/Mono Headphone Jack |
| Earphone | Earbud Type, Foam Cushion, 32 Ohm Impedance, Standard 3.5mm Plug |
| Antenna | Uses Earphone/Headphone Cord as Antenna |
| Battery | 2 x AA Alkaline or NiMH Up to 50 Hours Life with Alkaline, Up to 32 Hours with Rechargeable NiMH Enters Sleep Mode After 6 mins with no RF Signal |
| Current Consumption | 52mA, Nominal |
| Indicators | Green Power LED (Flashes for Low Battery) |
| Temperature Range | 32 to 122F (0 to 50C) |
| Approvals | FCC, Industry Canada, RoHS, WEEE |
| Finish | Black |
| Dimensions | 4.1 x 2.85 x 1.38″ (104 x 72 x 35mm) |
| Weight | 4.6 oz (130g) (With Batteries) 2.6 oz (73g) (Without Batteries) |
Williams Sound EAR 041 – Single, In-Ear, Isolation Earphone
Headphone
| Style | Monaural in-ear |
| Plug | 1/8″ / 3.5 mm mono |
| Driver Size | 0.4″ / 10.0 mm |
| Nominal Impedance | 16 Ohms |
| Frequency Response | 20 Hz to 20 kHz |
| Power Input | 5 mW |
| Sensitivity | 104 dB @ 1 kHz |
| Replacement Parts | Replacement Silicone Tip: EAR 043 (one pair) |
| Cord Length | 39.0″ / 99.1 cm |
| Weight | 0.2 oz / 6.0 g |
Williams Sound HED 021 Folding Mono Headphones
Headphone
| Driver Size | 1.2″ / 30mm |
| Maximum Power Handling | 100 mW |
| Foldable | Yes |
| Audio Connector to Source | 1/8″ / 3.5 mm |
Packaging Info
| Package Weight | 0.13 lb |
| Box Dimensions (LxWxH) | 6.6 x 5.05 x 2.2″ |
Williams Sound MIC 090 Mini Lapel Clip Microphone
| Element | Electret Condenser |
| Pickup Pattern | Omnidirectional |
| Impedance | 1.5 kOhms |
| Frequency Response | 20 Hz to 18 kHz |
| Dynamic Range | 79 dB |
| Sensitivity | -56 dB (3 dB) |
| Signal-to-Noise Ratio (SNR) | 63 dB |
| Plug | Right Angle: 1/8″ / 3.5 mm |
| Cable Length | 39.0″ / 99.1 cm |
| Approvals | RoHS |
Williams Sound AA Alkaline Battery (2-Pack)
Battery
| Battery Type | 2 xAA |
| Battery Chemistry | Alkaline |
| Battery Voltage | 1.2 V |
Williams Sound CCS 043 Leatherette Carry Case For PFM Pro, DWS Personal Communication Systems
Headphone
| Compatible with | PFM PRO or Digi-Wave personal communication systems Fits: PFM 330, PFM 360, Digi-Wave DLTs, Digi-Wave DLRs |
| Dimensions | 9.3 x 8.0 x 3.0″ / 23.5 x 20.3 x 7.6 cm |
| Weight | 0.70 lb / 0.32 kg |
Williams Sound CHG 3502 Dual-Bay Battery Charger For Select Bodypack Transmitters And Receivers (Black)
Headphone
| Compatible With | PLR BP1 Loop receiver PPA T36 Personal FM Transmitter PPA T46 Transmitter PPA R38 Receiver PPA R35-8 Receiver PPA R37 Receiver WIR RX 22-4 Infrared Receiver Motiva PFM T36 Personal FM Transmitter Motiva PFM R36 Personal FM Receiver Motiva PFM R33 Personal FM Receiver |
| Charging Time | 16 Hours (Nominal) |
| Capacity | 2 Components |
| Indicators | 2 x Red LEDs (One for Each Bay); LEDs Are Lit When Charging |
| Enclosure | ABS Plastic |
| Power Supply | Input: 100 to 240 VAC, 50/60 Hz; 6 W, 0.5-0.3 A Output: 6 VDC, 250 mA |
| Power | Charger: Input: 6 VDC, 300 mA, Center Positive Output: 100 mA per Bay |
| Batteries | NiMH Batteries Not Included |
| Approvals and Certifications | CE, FCC, RoHS |
| Dimensions | 4.9 x 3.9 x 2 / 12.4 cm x 9.8 cm x 5.1 cm |
| Weight | 1.12 lb / 0.51 kg |
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