Multi-screen venues from fitness centers to flight terminals and more can provide visitors with outstanding audio thanks to the PLS-900-04 system. Designed from the ground up for unmatched quality, simplicity, and flexibility, the PLS-900-04 lets you easily and affordably transmit up to four stereo/eight mono analog audio sources (upgradeable to 24 stereo/48 mono) to each user’s Apple or Android mobile device using the free ListenWiFi mobile app.

Setup is simple, with everything your venue needs to get started included in one package: an audio interface for converting and transmitting up to 4 stereo/8 mono analog audio sources; a 1RU server for managing the audio channels; and a wireless access point that delivers high-quality stereo audio to 60+ users over a coverage area of 6,500 m² (70,000 ft²).

Internet connectivity delivered to the server can be configured in the Server Admin programming to allow listeners to access Internet content while streaming your local audio content. Additionally, the Internet connection provides automatic updates, remote management options and the ability to configure the server to add your business logo to the mobile app. The system can be configured online at www.ListenWiFi.com or via the server’s own web admin interface.

The PLS-900-04 is easy to install, simple to maintain, and is backed by Listen Technologies’ outstanding support. Take advantage of low operational costs and virtually no maintenance while giving your customers high-quality audio delivered directly to their mobile devices.


One (1) PL-900-01 Server
One (1) PL-400-04-1R ListenWiFi 4 Channel Audio Interface, 1 RU (includes RCA/USB cables)
One (1) PL-301A ListenWiFi WAP-POE Combo


  • Offers a quick and easy way to provide up to 4 stereo/8 mono channels of wireless listening to 60 or more customers
  • Upgradeable to 24 stereo/48 mono channels for large or expanding businesses and venues
  • Ultra-quiet server can be installed nearly anywhere without being intrusive
  • Crystal-clear 16-bit stereo audio delivered to Apple and Android users
Configurations & Architectural Specs


One (1) PL-900-04 ListenWiFi 4 Stereo/8 Mono Channel System

Architectural Specs

4 Channel Wi-Fi Audio Distribution System – ListenWiFi Personal Listening

A. Furnish and install a Listen WiFi Personal Listening System.  The system shall be capable of broadcasting up to 4 stereo/8 mono channels accessible through a free mobile app available to download on both Apple iTunes and Google Play app stores. System shall be rack mountable. Wireless access point shall be able to cover 6,500 m² (70,000 ft² ) in an open building with single access point with no audio dropouts.  System shall deliver 44.8 KHz sampling rate with 16 bit resolution.  Audio stream per client must not exceed 0.2 Mbps. System must be able to support up to 60 smartphones and/or tablets. Hardware shall be an all-in-one system that does not require additional components (i.e. WiFi infrastructure, or external servers).  System shall be ready to use out of the box with very little setup.  Must be available to access via a common web browser to configure features.  System must be able to include the ability to add a venue logo, adjust delay, view audio level inputs, disable channels not in use, and set internet bandwidth pass-through rate.  System must be able to receive automatic updates without any user intervention and without any monthly fees.  It shall only use Multicast data transmission to deliver audio.   Listen Technologies products are specified.

B. Furnish and install the following:
PLS-900-04 that includes:  PL-900 Server, PL-400-04-1R 4 Stereo/8 Mono Channel Audio Interface, 1RU (includes RCA/USB cables), PL-301 Wireless Access Point, PL-200 WAP Power over Ethernet

Product Specifications


Frequency Response20 Hz - 20 kHz (±0.5 dB)
Dynamic Range84 dB (Stereo and Mono)
Input Sensitivity-10dBu unbalanced phono (RCA) connectors
Distortion< 0.5% total harmonic distortion (THD)
Channels4 Stereo/8 Mono Channels
Resolution16 bit depth
Sample Rate44.8 kHz


USBType A Female (server) to Type B Female (audio interface) - USB cables provided
Audio InputsStereo Phono (RCA)


Frequency Range2.4 GHz and 5 GHz (wireless access point)


Power Supply Voltage19 VDC 3.34 A Supply (63 Watts)


Dimensions (H x W x D)Server - 1RU rack mountable, 45 mm (1.75") x 4,283 mm (19") x 286 mm (11.25") (excludes feet)
Dimensions (H x W x D)Audio Interface - 1 RU rack mountable, 45 mm (1.75 in) x 483 mm (19 in) x 83 mm (3.25 in)
Ambient Noise30 dB


Data RateGigabit Ethernet


Shipping Weight25.0 lbs (11.25 kg)
QHow many mobile devices can connect to the ListenWiFi WAP at one time?
AOne wireless access point can support 60 to 100 mobile devices depending on how many channels are streaming.
QCan you connect the PL-900 ListenWiFi Server to an existing wireless network to stream audio?
AIt is not supported at this time as there are multiple implications to the performance of existing WiFi networks. ListenWiFi is focused on good quality low latency audio, and feel we best achieve this as a stand-alone system, which has been fully tested and guaranteed to work.  All that is required is a WiFi Site Analysis in order to determine the best operational frequencies for the system.  ListenWiFi delivers low latency multicast audio to the most users with this approach, as our network is not bogged down with extra traffic or network gear already on existing networks.  Therefore, we have decided not to support existing networks, but rather operate independently.  Listen has been asked this question, and has at times experienced push-back to our approach, but have decided it is in the best interest of our customers and users to operate ListenWiFi as a standalone system.  We feel the performance and usability will prove to be better with this approach.
QWhat is new about the ListenWiFi system?
AModular design so you can add additional channels later, higher audio bit-depth sampling, size of system is smaller (1RU), quite server, new website for configuring channels (no tablet required), ability to add venue logo, and unlimited software updates.
QCan this system be upgraded later to add more channels?
AYes, you would simply buy additional audio interfaces to get the desired number of channels.
QWhat are the advanced setting available on this new system?
APer channel you can adjust delay, gain, frame size and forward error correction. Also if customer allows a VPN connection can be established with the remote server for remote diagnostics.
Related Products
Copyright © 1998 - 2020 Listen Technologies Corporation. All rights reserved.
Listen, ListenPoint and related marks and logos are registered trademarks of Listen Technologies Corporation. Terms of Use | Privacy Policy
Listen Technologies