4-Person Enersound Assistive Listening System with ADA Plaque (5-Year Warranty)
- Product SKU: ALC-4P
- Dimensional Shipping Weight: 7.0 lb
- Category: ALC, Assistive Listening, Blowout Sale!, Home page
4-Person
Assistive Listening System With ADA plaque
Based in the USAU.S. phone support: (888) 737-40305-year warranty
The Enersound ALC-4P is a portable assistive listening system designed for small groups. This complete package includes four R-100 receivers with headphones, one T-500-4 transmitter, and an ADA hearing assistance plaque. It allows listeners to hear speech clearly in meeting rooms, classrooms, houses of worship, and other small venues.
Purchase with confidence from a U.S.-based company offering U.S. phone support and a 5-year limited warranty.
$629.00$439.00
HOW THE ASSISTIVE LISTENING SYSTEM WORKS
Audio is transmitted wirelessly directly to each listener's receiver, helping overcome the effects of background noise and distance for improved speech intelligibility.
Connect the audio source
Connect a microphone, audio mixer, or optional PA system to the T-500-4 transmitter, which features multiple inputs and connector types.
The transmitter broadcasts
The T-500-4 broadcasts audio over FM using one of its four selectable channels. It can transmit to an unlimited number of compatible receivers.
Listeners tune in
Each R-100 receiver delivers audio through the included headphones or through optional neckloops for hearing aids equipped with a telecoil (T-coil).
System Includes
- (4)Enersound R-100 digital FM receivers with LCD displays (non-backlit).
- (4)Enersound dual-ear headphones for listeners.
- (1)Enersound T-500-4 four-channel transmitter with antenna and power supply.
- (1)ADA hearing assistance plaque.
Neckloops are not included and are sold separately.
- Meeting rooms and corporate environments
- Houses of worship
- Schools and classrooms
- Movie theaters and public assembly spaces
- Any venue where attendees may have difficulty hearing or understanding speech
- Transmission range of up to 1,000 feet.
- Multichannel transmitter and receivers with microprocessor-controlled operation.
- 72–76 MHz FM frequency band; FCC and Industry Canada approved.
- Compact, lightweight receivers with belt clips, neck straps, and Velcro armband carrying options.
- Broadcasts to an unlimited number of compatible receivers.
- Easy setup and operation.
ADA Plaque Included; Neckloops Sold Separately
This assistive listening system is designed to help venues provide hearing assistance as part of their accessibility arrangements under the Americans with Disabilities Act (ADA). To accommodate hearing aid users with telecoil (T-coil) technology, optional neckloops are available separately.
- 1ADA plaque: Display it in your venue to let visitors know that hearing assistance is available.
- 2NKL-402 telecoil neckloops: Connect to the R-100 receivers and work with hearing aids equipped with T-coils. Ideal for listeners who prefer to use their own hearing aids instead of headphones. Sold separately.
- 3Expandable system: Add as many R-100 receivers and compatible neckloops as your venue requires.
Transmitter and receivers
T-500-4 Transmitter
- Four selectable channels: 72.1, 72.5, 72.9, and 75.7 MHz.
- Transmission range of up to 1,000 feet with an external antenna sold separately.
- Multiple input options and connector types for microphones, music, and other audio sources.
- Backlit LCD display.
- Tabletop or rack-mountable design.
- Adjustable RF output power and excellent audio quality.
R-100 Receivers
- One programmable channel, with 20 available frequencies and channel lock.
- Fully digital tuning with LCD display.
- Up to 55 hours of operation using alkaline batteries.
- Direct-access channel selectors.
- Included dual-ear headphones designed for clear, high-quality audio.
- Rugged construction for maximum reliability and durability.
Add Carrying Cases, Neckloops, and Headphones
Carrying Cases
Choose the CAS-10 option above. This carrying case accommodates up to 10 Enersound FM receivers and features a dedicated compartment for headphones and other accessories, metal-core hinges, nylon latches, and an integrated carrying handle.
NKL-402 Telecoil Neckloops
Designed for use with hearing aids equipped with T-coil technology, the NKL-402 creates an inductive loop around the neck, transmitting audio directly to the hearing aid. It features a 3.5 mm stereo plug.
Additional Accessories
- CAS-725 carrying/shipping case: holds up to 25 Enersound FM receivers, with a removable accessory tray.
- CAS-325 carrying case: lightweight, holds up to 25 Enersound FM receivers.
- CAS-550 carrying/shipping case: holds up to 50 Enersound FM receivers, with a removable accessory tray; waterproof and crushproof.
- HEAD-702 headphones: premium foldable headphones with reinforced cable and hi-fi speakers.
Backed by a 5-Year Limited Warranty and U.S. Phone Support
Technical Specifications
T-500-4 transmitter
| Operating frequency | 72.1, 72.5, 72.9 and 75.7 MHz |
|---|---|
| Channels | 4 selectable |
| Frequency deviation | Selectable: wide ±75 kHz or narrow ±25 kHz (max deviation) |
| Frequency accuracy / stability | ±0.005% / ±20 ppm |
| Output power | High: 80,000 µV/m at 3 m · Low: 40,000 µV/m at 3 m |
| Antenna | 50 Ω rubber ducky antenna or optional remote antenna; modified TNC connector |
| Compliance | FCC Part 15, Industry Canada |
| Frequency response | 100 Hz – 15 kHz |
| Signal-to-noise ratio | 70 dB |
| System distortion | <2% THD at 80% deviation |
| Audio input 1 | 3-pin XLR and ¼" TRS combination jack, mic or line level, balanced or unbalanced; 12 VDC phantom power |
| Audio input 2 | RCA jack, unbalanced line level (−10 dBu nominal, 100 kΩ) |
| External monitor in | RCA jack, unbalanced line level (−10 dBu nominal, 100 kΩ) |
| REC output | RCA jack, unbalanced line level (−10 dBu nominal, 10 Ω) |
| Front MIC input | 3.5 mm (1/8") TRS jack, supplies +DC on tip for electret mics |
| Audio processing | Signal compression 2:1 |
| Headphone out | 3.5 mm stereo TRS jack, adjustable output level, 61 mW max at 8 Ω, impedance 4–16 Ω |
| Power supply | In: 100–240 VAC, 50–60 Hz · Out: 15 VDC, 1 A; 5.00 mm OD, 2.5 mm ID barrel connector |
| Operating temperature | 23 °F to 104 °F |
| Storage temperature | −4 °F to 140 °F |
| Humidity | 0–95% relative humidity |
| Dimensions (D×W×H) | 5" × 5.5" × 2.36" |
| Weight | 1.2 lb (0.54 kg) unit · 2.2 lb (1.1 kg) shipping |
| Rack mounting | 1½ rack spaces high, ½ rack wide; one or two transmitters with optional RM-501 or RM-502 rack mounts |
R-100 receiver
| Batteries | 2 × AAA alkaline (1.5 V) or 2 × AAA NiMH rechargeable |
|---|---|
| Battery life | Up to 55 hours (alkaline) · up to 40 hours (NiMH) |
| Channels | 1 programmable (20 frequencies available) |
| Frequency range | FM 72.0–76.0 MHz |
| FM deviation / de-emphasis | ±75 kHz / 75 µs |
| Sensitivity | 1.12 µV at 12 dB SINAD |
| Signal-to-noise ratio | 55 dB at 100 µV |
| Audio frequency response | 80 Hz – 12 kHz |
| Audio power | 33 mW + 33 mW at 32 Ω |
| Audio connector | 3.5 mm stereo phone jack |
| Current consumption | 22 mA nominal |
| Dimensions | 3" (76 mm) diameter × 1.22" (31 mm) high |
| Weight | 2.3 oz (65 g) without batteries · 3.1 oz (88 g) with batteries |
Need help sizing your assistive listening system?
Tell us your room, how many people you need to reach and whether you need to meet ADA requirements, and we will help you choose the right package and neckloops.
Buy Now Talk to a Specialist Call (888) 737-4030FAQs About the Assistive Listening System
What is the Enersound ALC-4P Assistive Listening System?
The Enersound ALC-4P is a portable FM assistive listening system designed for small groups. Its T-500-4 transmitter wirelessly broadcasts audio to four included R-100 receivers with headphones, allowing listeners to hear speech clearly without the interference that background noise and distance can cause. The package also includes an ADA hearing assistance plaque to display at your venue.
Is the ALC-4P ADA compliant?
The package includes an ADA hearing assistance plaque to let visitors know that hearing assistance is available. To accommodate hearing aid users with telecoil (T-coil) technology, the system can be expanded with optional NKL-402 neckloops, sold separately. Meeting ADA requirements depends on your venue's complete assistive listening arrangements, including its seating capacity and accessibility needs. Contact us with your venue details, and we'll help you determine the appropriate configuration.
What is included in the package?
The ALC-4P package includes:
- Four Enersound R-100 digital FM receivers with LCD displays (non-backlit).
- Four Enersound dual-ear headphones for listeners.
- One Enersound T-500-4 four-channel transmitter with antenna and power supply.
- One ADA hearing assistance plaque.
How far does the system reach?
The T-500-4 transmitter offers a transmission range of up to 1,000 feet when used with an external antenna, which is sold separately. Actual range may vary depending on the building layout, walls, interference, and other environmental conditions.
Can I add more receivers?
Absolutely! The T-500-4 transmitter can broadcast to an unlimited number of compatible receivers. You can expand your system by adding as many R-100 receivers and optional neckloops as your venue requires.
Does it work with hearing aids?
Yes! The system works with hearing aids equipped with telecoil (T-coil) technology when used with optional NKL-402 telecoil neckloops. The neckloop creates an inductive loop that transmits audio directly to the hearing aid, allowing listeners to use their own hearing aids instead of headphones. Neckloops are sold separately.
Where can I use the ALC-4P system?
The ALC-4P is ideal for meeting rooms, houses of worship, movie theaters, schools, public assembly spaces, and other venues with a seating capacity of up to 100 people where attendees may have difficulty hearing or understanding speech.
Do I need a PA system?
No. A PA system is optional. The T-500-4 transmitter features multiple audio inputs and connector types, including a 3-pin XLR/¼" combination jack for microphone or line-level signals. It can connect directly to a microphone, audio mixer, or existing PA system, depending on your audio setup.
Which channels and frequencies does it use?
The T-500-4 transmitter offers four selectable channels at 72.1, 72.5, 72.9, and 75.7 MHz. Each R-100 receiver has one programmable channel, with 20 available frequencies and a channel lock feature.
What warranty does the ALC-4P include?
The Enersound R-100 receivers and T-500-4 transmitter are backed by a limited 5-year warranty, giving you added peace of mind with your purchase.
Is Conference Microphones based in the U.S., and is customer support available?
Yes! Conference Microphones is a U.S.-based company offering U.S. phone support. Our knowledgeable team is available to help you select and configure the right assistive listening system for your needs. Call us toll-free at (888) 737-4030 for assistance.
Is the ALC-4P portable?
Yes! The ALC-4P is designed for convenient portability. The T-500-4 transmitter can be used on a tabletop or installed in a rack, while the compact, lightweight R-100 receivers are easy to carry and distribute. For convenient transportation and storage, you can also add the optional CAS-10 carrying case, which holds up to 10 Enersound FM receivers.
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