Description:
The RU‑VCA2A Two Channel Digitally Controlled Attenuator and RLC10K Remote Level Control are used to increase and decrease the level of the Stereo Sound source feeding the amplifiers. The RU‑VCA2A offers clickless level adjustment, accurate tracking and outstanding wide‑band, low‑noise studio quality performance. It can be controlled remotely by a variety of RDL or third‑party controls and/or locally via front‑panel pushbuttons. Each audio input and output may be configured balanced or unbalanced. Multiple RU‑VCA2As and/or RU‑VCA6As may be linked together for single‑point level control of 7.1, 10.2 or 22.2 surround sound systems.

Description:
Attendees select the audio source and listening level in their seating box using a wall‑mounted SAS‑RC8 Room Control Station. Three sources are available for selection in each seating box: Stadium Broadcast Audio, MP3 music or the Press Feed. The SourceFlex system accommodates a maximum of 8 possible sources, plus one paging input. Mono sources are connected to the rack‑mounted SAS‑8i Audio Input Chassis. Stereo sources are converted to mono using RDL TX‑J2 modules. All control, power and audio signals connect through a single wiring cable between each SAS‑RC8 and the SAS‑8i. A line‑level output from each wall control is amplified by an FP‑PA20A 20 Watt Power Amplifier to two or more 70 V loudspeakers. An internal amplifier in the SAS‑RC8 may be used to drive 8 Ohm speakers in seating requiring up to 1.5 Watts. The SAS‑8i supports a maximum of four separate seating box zones and provides connection of multiple expansion chassis: SAS‑82 Two Station Controllers and SAS‑8C Eight Station Controllers. There is no practical limit to the number of possible zones. SourceFlex wall controls are available in several styles to match any décor.

Description:
This system uses a digital audio distributor to route the venue audio out to multiple digital amplifiers. Any of the outputs of the HR‑DDA4 can be switched to provide S/PDIF (coaxial or optical), AES/EBU, or AES3ID formats.

Description:
Speeches, government meetings, product announcements and other media events covered by reporters require multiple high quality audio feeds in the press room. The recording equipment may require a balanced or unbalanced line level or mic‑level signal. Each output feed must be isolated so that if one output is accidentally shorted or back‑fed, all other feeds and the public address system remain unaffected. An RDL RU‑ADA4D Audio Distribution Amplifier provides isolated audio output signals that drive a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Professional 4‑Input Mixer with selectable compressor is used to mix the audio sources. The line‑level mix is distributed by the RU‑ADA4D to up to 8 line‑level outputs on RCA, 1/4" phone, or XLR jacks. Three of its outputs are padded down to mic level using RDL TX‑LM2 line‑level to microphone‑level transformers. All jacks shown are on Decora® compatible wall plates. These jacks are also available in the RDL AMS series should a custom rack or tabletop configuration be preferred. Video distribution may be added using RDL composite and VGA/XGA distribution amplifiers.

Description:
The daily Calendar of Events listing at this hotel is generated from an office computer. An RDL EZ‑VM14 distributes the VGA signal of the schedule display to three monitors located near the entrances of the hotel meeting rooms. The wide bandwidth of the EZ‑VM14 insures that the same high resolution image seen at the local monitor is seen at each hotel monitor.

Description:
RDL’s Twisted Pair Connector Plates and Remote Controlled Mixer are ideal for this hockey rink or other sports arenas announcement system. The straightforward design makes the system easy to understand and operate for the timekeeper. RDL D‑TPS1A and D‑TPS7A input plates located inside the timekeeper’s box send a local microphone and a line level audio source (Computer, MP3, CD or DVD player) to the first two channels of the FP‑TPX3A Remote Controlled Mixer in the amplifier rack. The third mixer channel is fed from another D‑TPS1A located near the ice, providing a microphone input close to the action. Installing the D‑RC3M Remote Mixing Control within arm’s reach allows the timekeeper to easily adjust levels and mute any of the sources. The FP‑TPX3A incorporates an audio detector and timer that can be used to turn off the power amplifiers when the system is not being used, resulting in substantial energy savings. The mixer inputs and the remote control are all connected using common UTP cable such as CAT5 with standard RJ45 connectors.

Description:
Speeches, government meetings, product announcements and other media events covered by reporters require multiple high quality audio feeds in the press room. The recording equipment may require a balanced or unbalanced line level or mic‑level signal. Each output feed must be isolated so that if one output is accidentally shorted or back‑fed, all other feeds and the public address system remain unaffected. An RDL RU‑ADA8D Audio Distribution Amplifier provides isolated audio output signals that drive a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Professional 4‑Input Mixer with selectable compressor is used to mix the audio sources. The line‑level mix is distributed by the RU‑ADA8D to up to 16 line‑level outputs on RCA, 1/4" phone, or XLR jacks. Any of these outputs could be padded down to mic level using RDL TX‑LM2 line‑level to microphone‑level transformers. All jacks shown are on Decora® compatible wall plates. These jacks are also available in the RDL AMS series should a custom rack or tabletop configuration be preferred. Video distribution may be added using RDL composite and VGA/XGA distribution amplifiers.

Description:
This example shows the use of the RDL EZ‑MCP1 Microphone Compressor and the RDL HD‑PA35U Power Amplifier in a Karaoke system. The EZ‑MCP1 is an in‑line device that connects between a dynamic or condenser microphone and the mic‑level input of the Karaoke machine. When properly adjusted, it will produce consistent audio levels despite wide variations of up to 30 dB from the microphone and will control signal overloads that cause distortion and clipping. The output of the HD‑PA35U Power Amplifier is rated at 35 W RMS into a 4Ω or 8 Ω load. The included analog compressor/limiter allows the amplifier to produce audio output levels and clarity normally expected from amplifiers with a much higher output rating. Additionally, the amplifier includes Sleep Mode circuitry that puts the amplifier into standby mode after a predetermined period of time with no audio at the input. The presence of signal at the input causes the HD‑PA35U to return to full operation.

Description:
This application provides multiple paging locations, with priority assigned to each location. Each location has a mic equipped with a PTT (push‑to‑talk) momentary pushbutton. The STM‑2 preamp for each microphone should be installed near the associated mic. Wiring between each STM‑2 output and the corresponding ST‑VP2 is balanced, connected with shielded or unshielded twisted‑pair cable. When any microphone is used, the music fades down and paging becomes active. The highest priority mic overrides the lower priority mic(s). This arrangement may be carried out for an unlimited number of paging locations.

The FP‑PA20A 20 Watt Power Amplifier feeding 70 Volt speakers is used in this example. RDL offers a wide range of power amplifiers for paging and public address applications.

Description:
The RDL FP‑ECC1 Energy Conservation Controller automatically powers up the electronics for this restaurant when needed and powers down the equipment when the restaurant is vacant to conserve energy and reduce operating costs. Motion sensors in the restaurant public areas trigger the FP‑ECC1 to switch on the system equipment power outlets. Continued activity in the seating areas will retrigger the FP‑ECC1 to keep the system turned on. After a switch‑selectable time period of 15, 30, or 60 minutes with no activity, the FP‑ECC1 will turn off the system electronics. No operator intervention is needed to turn the system on or off. An STM‑2 Microphone Preamplifier amplifies the reception desk paging microphone to line level. The associated push‑to‑talk switch causes the ST‑VP1 Voice‑Over/Paging Module to insert paging mic announcements through the house system. The D‑ECR1L Power On/Off Remote Control allows the system to be manually turned on and/or off. It also provides a system master level control to adjust the volume of the RU‑PA40D 40 Watt Stereo Power Amplifier.

Description:
The security camera at the top of the ski lift feeds an RDL TX‑TPS1C Active Three Pair Sender. At the end of about one mile of twisted pair cable, a TX‑TPR3C Twisted Pair Receiver feeds the video monitor in the security office. The TX‑TPR3C is set to terminate the twisted pair cable. GAIN and EQ controls are adjusted to compensate for cable losses. Note: Two audio pairs are also available on the RDL Format C modules. No audio is shown in this application; the audio channels could be used to provide talk‑back capability from the upper lift operator station.

Description:
This intercom application reduces the hardware requirements for a secure or weatherproof call box like those found in drive‑through talkback systems or secured entryways. The ST‑IC1 Intercom Amplifier input accepts a dynamic mic or phantom powered condenser mic. It can also use an 8 Ω or a 45 Ω speaker as a microphone element. An ST‑LCR1 Logic Controlled Relay is used in this application to switch a remote speaker so that it can function alternately as a speaker and as a microphone.

Description:
In an amusement park's Haunted Mansion ride, pre‑recorded screams on the FP‑MR2 Message Repeater are triggered by a motion sensor's contact closure in real time when the "victims" enter a particular room. The eerie background music is ducked when the message is played and restored after completion. The FP‑MR2 is fed into an RU‑PA40D Power Amplifier. The amplifier feeds two loudspeakers. Volume is adjusted by an RLC10KS Level Control.

Description:
This RDL Format‑C twisted pair system allows for the distribution of both audio and composite video over a standard CAT5 cable. This simplifies and speeds up system installation by allowing one economical cable to deliver both audio and video signals. The Format‑C sender in the data closet feeds the audio and video to receivers mounted behind each flat panel display. Twisted pair cables loop from one receiver to the next. A Format‑C distributor would allow for configurations with multiple distribution branches.

Description:
The RU‑VCA6A Six Channel Digitally Controlled Attenuator and RLC10K Remote Level Control are used to increase and decrease the level of the 5.1 Surround Sound source feeding the amplifiers. The RU‑VCA6A offers clickless level adjustment, accurate tracking and outstanding wide‑band, low‑noise studio quality performance. It can be controlled remotely by a variety of RDL or third‑party controls and/or locally via front‑panel pushbuttons. Each audio input and output may be configured balanced or unbalanced. Multiple RU‑VCA6As and/or RU‑VCA2As may be linked together for single‑point level control of 7.1, 10.2 or 22.2 surround sound systems.

Description:
Video monitors in public spaces often include speakers with insufficient fidelity and/or volume. Such flat panels typically offer only speaker level outputs. This application couples good quality speakers with RDL modules to fill the space with full fidelity audio. The only audio outputs on the flat screen are speaker‑level outputs. Each output channel is fed to the input of an RDL TX‑8A Adjustable Line Transformer which attenuates the signal to a standard balanced (or unbalanced) line level. The line‑level signals are amplified by a pair of ST‑PA18 18 W RMS Power Amplifiers to drive quality loudspeakers. The loop out of each ST‑PA18 is fed to one of the summing inputs on the ST‑CX2S Subwoofer Filter. The ST‑CX2S combines the left/right channels and applies the subwoofer low‑pass crossover. The ST‑CX2S output feeds an ST‑PA18 which is used to drive a subwoofer. This application is often installed on flat panels that have audio amplifier power ratings that should be sufficient for the space if they applied to each channel and were usable RMS power. The ST‑PA18 modules employ integral aurally transparent compression to deliver more of the modules’ average power to the speakers, often producing astounding fidelity when compared against the amplifier/speaker combination in the source flat panel.

Description:
Each piece of exercise equipment is outfitted with an RDL SAS‑HC8 Headphone Control Station so that users can select from eight audio programs and adjust volume to their own preference. Six audio sources in this system are associated with video monitors at the front of the room. A TX‑J2 Unbalanced Input Transformer is used to combine each stereo signal to mono. Two other channels are from radio or satellite receivers. The SAS‑8i Audio Input Chassis also provides an “all call” paging input.

The SAS‑8i supports four SourceFlex listening stations and multiple SourceFlex expansion chassis’. Listening station expansion may be added in groups of two with the SAS‑82 2 Station Audio Controller or in groups of eight with the SAS‑8C 8 Station Audio Controller. There is no practical limit to the number of listening stations in any system. Connections between the controller and each listening station use a multi‑conductor twisted‑pair cable. The SourceFlex system is reliable and cost effective without the problems of wireless systems with rechargable batteries.

Description:
The RU‑SX4A Balanced Audio Switcher is controlled by the RCS4S Remote Channel Selector to select 1 of 4 audio sources. The output of the RU‑SX4A is connected to the audio input of the HD‑PA35UA. The HD‑PA35UA is a 35 Watt constant voltage amplifier with an internal VCA which is controlled by an RLC10KMS Remote Level Control with Muting. The HD‑PA35UA features an integral audio compressor that controls clipping. The RCS4S and RLC10KMS are mounted inside a two gang box* with an RDL CP‑2S Stainless Steel Cover Plate.

Description:
An RDL TX‑J2 Unbalanced Input Transformer provides a balanced mono audio source from the computer in this information kiosk. The FP‑PA18H 18 Watt Mono High Temperature Audio Amplifier provides ample power to drive the 8 Ohm speaker. Its integral compressor/limiter provides consistent levels for enhanced intelligibility without clipping. The ST‑PA18H is rated for operation between 0 and 70 degrees C (158 degrees F) so that it can operate comfortably when used in a space that is not temperature controlled.

Description:
This outdoor parking area is equipped with speakers mounted in the lamp structures to provide music and paging coverage. Speakers in each pole are powered by an RDL FP‑PA18H 18 Watt Hi‑Temp Audio Amplifier. The amplifier module is mounted in an unventilated watertight enclosure at the base of each pole. The poles recieve direct sunlight causing the potential for high internal ambient air temperatures. The highly efficient FP‑PA18H is ideally suited to this environment. It is designed for operation in ambient temperatures up to 70 degrees Celsius (about 158 degrees Fahrenheit) and contributes negligible heat to the ambient temperature inside the pole. The amplifier’s integral compressor/limiter insures maximum intelligibility by keeping average power levels high and preventing clipping. The FP‑PA18H combines RDL's high audio performance standards with the capability of operation in harsh temperature environments. Notes: 1] If it is desired to monitor the operation of the complete system, the audio detector included in each FP‑PA18H can be wired back to the system audio rack to confirm that audio is being received and amplified at each pole. 2] If the FP‑PA18H is acquired with an RDL power supply, that supply must be located in an ambient environment not to exceed 40 degress C. FP‑PA18H modules are available without a power supply for use with high temperature supplies or in systems using distributed 24 Vdc power. Contact RDL Technical Support for more information.

Description:
One of the common uses for the ST‑ACR2 Audio Controlled Relay is to provide switching when a priority audio source is active. In this example the priority source is the jukebox which shares the same audio system as the background music source. The ST‑ACR2 samples line level audio from the jukebox and switches the audio input to the power amplifier from the jukebox when it senses audio from the jukebox.

The RDL TX‑PA40D 40 W Stereo Audio Power Amplifier is shown in this system.

Description:
A video source distributed to remote viewing areas such as public transport waiting areas or overflow meeting rooms is easily degraded by “ground loops”. The difference in ground voltage between the video source and monitoring locations can create herringbone patterns or rolling hum bars. Small “ground loop” voltages can easily impair the quality of a 1 Volt video signal. The RDL EZ‑HK2 at the monitor location removes the “ground loop” using a high quality video transformer in a shielded metal enclosure. The input jack is ground‑isolated. A ground‑lift switch allows the output jack shield to be lifted from the metal chassis if required.

Description:
The RU‑VCA6A (6 channel) and RU‑VCA2A (2 channel) Digitally Controlled Attenuators are arranged in a MASTER/SLAVE configuration to allow single point level control of the 7.1 surround sound source feeding the amplifiers. Either VCA module may serve as master. This application uses an RLC10K Remote Level Control to control the RU‑VCA6A. The RU‑VCA6A control output port is connected to the control input of the RU‑VCA2A, which is set to slave mode. The RU‑VCA2A follows the level setting of the RU‑VCA6A. Multiple VCA modules may be slaved from a single master module. The RU‑VCA6A and RU‑VCA2A offer clickless level adjustment, accurate tracking and outstanding wide‑band, low‑noise studio quality performance. They can be operated remotely by a variety of RDL single or multi‑point controls, third party controllers and/or locally via front‑panel pushbuttons. Each audio input and output may be wired balanced or unbalanced. The RU‑VCA6A and the RU‑VCA2A may be used independently in 5.1 surround and stereo systems.

Description:
Speeches, government meetings, product announcements and other media events are occasions where a number of reporters in the electronic press require a high quality audio feed from the event organizers. The recording equipment in use might require a mic, balanced line level or unbalanced line‑level signal. It is critical that each feed is isolated so that if one feed is accidentally shorted or back‑fed, no other feed will be affected nor will the public address system. This example uses RDL STICK‑ONs® to provide isolated audio output signals driving a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Pro 4‑Input Mixer is used as the audio source. The line‑level source is distributed through an ST‑DA3 Audio Distribution Amplifier to line‑level outputs on RCA, 1/4¨ phone, and XLR jacks. The same source is padded down to mic level using an STP‑1 Attenuator and distributed through an STM‑DA3 Microphone Distribution Amplifier to the mic outputs. All jacks shown are on Decora® wall plates. These jacks are available in the RDL AMS series should a rack or tabletop mount be preferred. Distribution of video at these events can also be added using RDL composite and VGA/XGA distribution amplifiers.