RDL®

RDL Unveils the RU-NMP44 Network Mixing Processor

Prescott, AZ, April 8, 2024  RDL is proud to announce their latest creation, the RU-NMP44, a cost-effective, quality network mixing processor that delivers the flexibility of network audio for any system size or budget. Designed to be versatile, and to support a wide range of system designs, the RU-NMP44’s superior performance specifications make it ideally […]

Dante® Plenum-rated Network Audio Amplifiers

RDL manufacturers dozens of audio amplifiers for Dante network or conventional audio systems, including a selection of plenum-rated network audio amplifiers. Amplifier models and features: SF-NP35E PoE++ Network to 35 W Mono Audio Amplifier – 70 V or 100 V SF-NP16E PoE+ Network to 16 W Mono Audio Amplifier – 70 V or 100 V […]

PoE Plenum-rated Network Audio Amplifiers

Simplify Audio Installations – Deliver Network Audio and Power to Amplifiers over a Single Cable The RDL SF-NP16E and SF-NP35E Network Amplifiers convert a single Dante or AES67 audio channel to a 70 V or 100 V constant voltage amplified output. Amplifier features: PoE powered Plenum Rated per UL Standard 2043 Integral VCA for optional user […]

Versatile Touch-Activated Pushbutton

The AMS-TS1 Illuminated Touch-Activated Pushbutton is a versatile interface used to initiate functions such as MUTE or OVERRIDE in automatic mixers and digital audio signal processors. It can be integrated with virtually anything that can be controlled by an Open Collector (pull to ground).  Integral red and green LED’s indicate the status of the pushbutton. […]

RDL Dante™ Networked Audio Interfaces, Source Selector and Volume Control provide stability and flexibility for the Poppodium 013 Music Venue

RDL Dante™ Networked Audio Interfaces, Source Selector and Volume Control provide stability and flexibility for the Poppodium 013 Music Venue The Poppodium 013 or Pop Stage 013, located in the southern Netherlands city of Tilburg, is the largest music venue in the area with three halls accommodating up to 2,700 guests. During a recent upgrade, […]

Shattuck-St. Mary’s School Chooses RDL Dante Networked Audio Interfaces for Their Mass Notification System

RDL Dante™ Networked Audio Interfaces Provide Shattuck-St. Mary’s School with Stability and Flexibility in their New Mass Notification System Founded in 1858, Shattuck-St. Mary’s School (SSM) has a long-standing reputation and standard of excellence, so when switching to a new Campus Alert and Notification System, excellence remained at the forefront of every decision made. “In […]

Automatically Adjust Audio Level when HVAC System Turns On

Noisy HVAC System?  Using just a couple of RDL modules, the level of your audio system can automatically adjust to compensate for the increased noise level when the HVAC system turns on.  This is useful for background music systems, paging systems or any type of public address or mass notification system. A contact closure provided […]

Simple Two Room Audio Combining System

A common application we are asked to help with is a simple Two Room Combining System. The system shown in the drawings below allows the user to combine the outputs of the ROOM A and ROOM B mixers and route the combined signals to the ROOM A and ROOM B amplifiers. The D-RT2 Remote Control […]

Muting a Sound System During a Fire Alarm

In public buildings it is often required that sound systems be muted during a fire alarm. The installer of the fire alarm system will generally provide the installer of the sound system with a set of dry relay contacts to initiate a sequence of control that is, hopefully, well defined in the project specifications and […]

Schoonover Center – Ohio University’s Scripps College of Communication

RDL Dante™ Interface and Headphone Amplifiers provide students with personal audio monitoring in the Critical Listening and Post Production Studio As part of a progressive movement to put students ahead of their time with professions in audio engineering and multimedia content creation, Ohio University’s Scripps College of Communication incorporated RDL’s TP-HA1A FORMAT-A™ Headphone Amplifier, along […]

FORMAT-A Signal Breakout

The RDL TX-TP4PW Format-A Power Inserter / Signal Breakout is used in a variety of applications where it is necessary or more practical to provide each FORMAT-A sender and / or receiver with its own cable run rather than looping products together in the field. For installations where senders are located in separate rooms, the […]

Setting IP Addresses of Dante™ Devices

In order for Dante devices to communicate with a computer loaded with DANTE CONTROLLER, the Dante devices and the computer must first be on the same network (in the same range of IP addresses). If not on the same network, Dante Controller will discover and display the names of the devices, but will not be […]

Decora® Dual Mic Preamp with Automatic Gain

The D SERIES-TPSM2A is a single-gang Decora style two channel microphone preamplifier compatible with other RDL Format-A senders and receivers as well as RDL RU-FN and RU-BNF Dante™ interfaces. The D-TPSM2A provides 48 volt phantom power for condenser microphones and XLR inputs accept signals from both dynamic and condenser microphones. One of the features that […]

Adapt Existing Audio Power Amplifiers to a Dante Network

Upgrading a sound system to include Dante networked audio doesn’t mean replacing all of the existing power amplifiers. An FP-NML2 Network to Mic/Line Interface will convert 2 Dante audio channels for connection to any device with analog mic or line-level inputs. Each output is equipped with a recessed “MIC/LINE” switch that allows the installer to […]

Choose the Audio Relay with the Correct Release Time

The ST-VOX1 Voice Operated Relay can be actuated by an unbalanced mic or line level source. It is primarily used in intercom and talkback applications where a fast contact release time (adjustable 70 to 260 ms) is desired. In applications where longer release times are desired we suggest the use of ST-ACR Series Audio Controlled […]

How to: Jukebox Override Background Music

Some time ago we discussed the various uses of RDL ST-ACR Series Audio Controlled Relays. One of the applications mentioned was Jukebox Overrides Background Music . We are frequently asked to provide point to point wiring diagrams for this type of application and have produced the following drawings for balanced or unbalanced / mono or […]

Compact Near Field Monitor Speaker for Conference Facilities, Courtrooms and Legislative Chambers

The D SERIES-SP1A Decora-Style Loudspeaker is ideal for use as a near field monitor in courtrooms, legislative chambers and conference facilities. Designed for mounting in a single gang of a North American electrical switchbox or RDL Desktop Chassis, this compact package offers surprising frequency range, clarity and durability. A companion amplifier for the –SP1A is […]

Remote Switching of Speaker-Level Signals

In installations that require the capability to remotely switch loudspeakers off or on when portions of a facility are not in use, the RDL ST-LCR1H High Power Logic Controlled Relay and D Series-RT2 Remote Control Selector provide the ideal solution. The ST-LCR1H is capable of switching speaker loads up to 500 Watts. The D Series-RT2 […]

Conserve Rack Space by Using RDL’s DIN Rail Mounting Brackets

35 mm DIN rail is widely used in commercial and industrial communications and control systems for mounting terminal strips, power supplies, relays and controllers in equipment racks and enclosures or on communications back-boards.  DIN rail provides integrators with a common method of mounting system components from a variety of sources in a wide range of […]

Gating a Noisy Signal

A recent call into the RDL Tech Support line came from a contractor who was installing a paging system on a campus where it was not practical to run cable between the various buildings. They had installed a low power FM transmitter at the main office and receivers that fed the amplifiers in the various […]

Automatically Provide Gain to Low Level Signals and Attenuation to High Level Signals

    The high performance ST-GCA3 is an automatic gain control amplifier that provides a constant average audio output despite variations in input levels. It is used extensively in broadcast production and transmission, conferencing and sound reinforcement systems. The ST-GCA3 automatically provides gain to low level signals and attenuation to high levels. The adjustment rate […]

Prevent THUMPS and POPS When Powering A/V System On or Off

Proper power ON and OFF sequencing in a sound system will prevent annoying and sometimes damaging THUMPS and POPS by turning power amplifiers ON last and OFF first. Sequentially powering ON multiple electrical / electronic components will also help manage high inrush currents that can cause circuit breakers to trip and current-limited power supplies to […]

Voice Intercom System using 2 STICK-ONs

The ST-IC1 Intercom Amplifier is the building block for a variety of voice intercom applications ranging from Patient Monitoring in health care facilities to Entry Access communications in industrial, residential, educational and correctional facilities. The ST-IC1 has a single microphone level input, a single speaker level output and muting control terminals. The input is capable […]

Passive Audio Combining and Dividing

The RDL STD Series of Divider / Combiners provide a cost effective way of combining audio signals from multiple sources with similar impedance and level characteristics or for distributing a single audio signal to multiple inputs. They are frequently used to combine stereo sources to mono or to combine several microphones to a single output. […]

Add Additional Audio Inputs to an Existing Mixer

The ST-MX3 is a quality, yet cost effective way of mixing up to three line-level signals to a single line-level output. Balanced and/or unbalanced line-level signals of different levels and impedances may be combined with typical RDL low-noise and low-distortion performance.   The ST-MX3 is often used for: adding additional inputs to an existing mixer […]

Vinyl or Bust!

The RDL ST-PH1 Stereo Phono Preamplifier provides DJ’s and audiophiles a high quality method of interfacing the cherished turntable with newer professional or consumer audio systems that might not have PHONO inputs.     The ST-PH1 features: Industry standard 47 kΩ unbalanced inputs Outputs drive high or low impedance / balanced or unbalanced lines Equalization […]

Monitor up to 12 Channels of Audio in a Single Rack Unit

Used in commercial, professional, studio and broadcast applications to measure and display audio levels, the RU-SM16A and RU-SM16D provide a flexible, precision analog audio metering solution. InfoComm Product Overview Video Rear-panel switches allow the user to define each meter string in terms of: LEVEL: Line-level – Balanced or Unbalanced 25V Constant Voltage or 8W < […]

Expandable Multi-Channel Local and/or Remote Audio Level Control

The RDL RU-VCA2A and RU-VCA6A are full-featured multi-channel attenuator modules for local and/or remote level control of line-level analog audio. The RU-VCA2A is a two-channel device for stereo or mono use. The RU-VCA6A is a six-channel product for control of 5.1 Surround Sound. Either attenuator may also be used to control multiple individual analog audio […]

Isolated Mixing of Two Unbalanced Line-Level Audio Sources

The RDL TX-MX2R is often used in commercial and residential sound systems to provide active, isolated mixing of a single unbalanced line-level stereo source to dual mono outputs. It can also be used to mix two separate mono sources. Featuring high-impedance inputs that are mixed using an active summing amplifier, the TX-MX2R can be used […]

Compact Mono and Stereo Audio Format Conversion

The RDL TX-A2 Balanced to Unbalanced Audio Converter is a passive device providing isolation and attenuation between a balanced +4 dBu mono source and two unbalanced -10 dBv mono inputs. Isolation is provided by a studio-quality transformer with its output coupled to a resistive attenuation network. The TX-A2D Balanced to Unbalanced Dual Audio Converter provides […]

Expandable Audio Mixing

Featuring the versatility, reliability and low-noise performance typical of RDL products, the RU-MX5ML provides expandable audio mixing capabilities for applications in corporate, house of worship, sports, educational and hospitality environments. The RU-MX5ML features five inputs each with a front panel user adjustable level control. Four inputs are switch-selectable mic or line. The fifth is line […]

RACK-UP Series Stereo Audio Distribution Amplifiers

The RDL RU-ADA4D and RU-ADA8D are high performance line level Stereo Audio Distribution Amplifiers suitable for use in any professional audio application. The RU-ADA4D is Stereo X 4 and the RU-ADA8D is Stereo X 8. Inputs are provided with front panel screw driver adjustable gain trimmers and RDL Dual-LED VU meters to assure proper operating […]

Versatile Two Channel Mic/Line Preamplifier

The two channel RU-MLA2 is a stereo or dual mono Audio Preamplifier designed with versatility in mind.  Suitable for use in installed or portable sound reinforcement and recording systems, the RU-MLA2 provides the audio clarity, reliability and flexibility expected of RDL products. RU-MLA2 inputs and outputs are individually switch-selectable between mic and line level.  This […]

The Versatile RU-MLD4 Audio Distribution Amplifier

The RU-MLD4 is a multipurpose 1 X 4 mono Audio Distribution Amplifier with the flexibility, reliability and quality engineered into every RDL product. The RU-MLD4 input and each of the four outputs are switch selectable between microphone and line-level. A user-adjustable front panel gain trimmer and RDL Dual-led VU meter are provided to simplify set-up. […]