23 Applications for Home Theatre
10 Items Per Page
Select Between 4 Composite Video and Stereo Audio Sources
AN-2077
Description
Switching between multiple A/V sources is a common task in home theatres. This diagram illustrates the EZ‑AVX4 being used to switch between a DVR, DVD player, a gaming console and a VCR. The RDL EZ‑AVX4 Composite Video and Stereo Audio Input Switcher features solid state switching on the audio and video signals making them immune to mechanical switch noise and ensures a long life of reliable operation.
The EZ‑AVX4 is shipped with a high efficiency power supply that connects to a locking dc power jack.
RFI Suppressed on Six Signal Conductors
AN-2177
Description
The ST‑FS6 Ferrite Suppressor / RF Filter is used to attenuate excessive RF interference (RFI) induced in the wiring conductors by a nearby communications tower. The passive ST‑FS6 provides six isolated channels of highly effective ferrite RF suppression without capacitance to ground or series resistance. Two ground terminals are provided to be used as tie points for connecting cable shields (not pictured). The ground lugs have no internal connection to the suppression circuitry. Each of the six I/O terminals may be used independently for the suppression of RF on Audio, dc power or logic control signal conductors. RF interference on audio and control wiring causes unwanted audio noise or instability in control circuits. The ST‑FS6 is normally installed at the rack where signals are received. It is possible that interference may interfere with audio or control sending equipment, making it beneficial to install a suppressor module at both ends of the long interconnection lines.
Multi-Channel Level Control for Theater or Control Room
AN-2159
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.
MP3 Music Player with Two Outdoor Rock Loudspeakers
AN-2022
Description
An outdoor patio is equipped with a DS‑CIJ3 Consumer Input Jack Decora® plate that provides connectivity for an MP3 music player or other stereo audio source. The DS‑CIJ3 provides a balanced mono sum of the MP3 player source to the ST‑PA18 Audio Power Amplifier. The ST‑PA18 is a high‑efficiency, Class D power amplifier that provides 18 Watts RMS to the rock speakers. The ST‑PA18 has an integral audio compressor to control clipping. The DS‑CIJ3 (mounted in a CP‑1S Stainless Steel Single Gang Cover Plate and SMB‑1G Surface Mount Box) and the ST‑PA18 are mounted in a standard weatherproof box.
Distributed dc Power From Current-Limited Switching Power Supply
AN-2193
Description
The low current consumption of STICK‑ON modules allows multiple modules to be powered from a single supply. The ST‑PD5U distributes power from any RDL current‑limited switching power supply to up to five modules with a total current requirement of 2 amperes or less. RDL 24 Vdc switching power supplies (purchased separately) are available with current ratings of 500 mA, 1 A and 2 A. All meet ENERGY STAR Level V standards.
Interface Your Turntable with Modern Consumer or Pro Equipment With No Phono Inputs
AN-2194
Description
After the introduction of digital audio sources such as the CD and MP3, many manufacturers of both consumer and professional audio equipment omitted traditional phono inputs in favor of additional line inputs. The ST‑PH1 Stereo Phono Preamplifier provides a low‑noise RIAA preamplified interface between a turntable and any analog balanced or unbalanced line‑level inputs on a mixer, processor or amplifier. Placing the ST‑PH1 as close to the turntable as possible allows the wiring between the tone arm pickup and the preamplifier to be kept as short as possible for optimum low‑noise system performance.
Professional Stereo Headphone Amplifier with Level Control
AN-2191
Description
Two RDL ST‑VCA3 Voltage Controlled Amplifiers are used to adjust the audio level using an RDL AMS‑10K Linear Potentiometer at the listening location. Audio does not pass through the potentiometer, assuring years of scratch‑free adjustment. The RDL ST‑SH2 Stereo Headphone Amplifier drives headphones of any impedance (8 ohms or high impedance) from consumer or professional audio sources. The exceptional low noise (better than 100 dB below operating level), low distortion, audio clarity and excellent crosstalk performance makes this module ideally suited to a wide variety of demanding audio applications. The AMS‑1/4F is a female ¼†stereo phone jack which is mounted together with the AMS‑10K to an RDL D‑D2 Double Plate installed in an RDL DC‑1G Surface Mount Box. The installation is completed with an RDL CP‑1 Cover Plate.
Crossover Module Allows Mono Amplifier to Drive a Passive Subwoofer
AN-2179
Description
The RDL ST‑CX2S Subwoofer Crossover Filter provides active line‑level equalization for the addition of a subwoofer to a sound system equipped with full‑range speakers. The ST‑CX2S high‑impedance line‑level stereo inputs bridge existing line‑level stereo sources. Each input is isolated to prevent the introduction of any crosstalk to an existing stereo signal. The low impedance (150?) line‑level output can drive low or high impedance lines. Inputs and output may be wired balanced or unbalanced.
Audio Format Conversion with Metering and Level Controls
AN-2076
Description
It is frequently necessary to use professional and consumer audio equipment in the same environment. The EZ‑AFC2 provides both balanced‑to‑unbalanced and unbalanced‑to‑balanced conversion for stereo audio line‑level signals. Superior electrical performance ensures audio transparency. All channels are monitored via dual‑LED VU meters. Front panel knobs allow for easy level adjustment. The fully connectorized EZ‑AFC2 makes this common interface task as easy as possible.
The EZ‑AFC2 is shipped with a high efficiency power supply that connects to a locking dc power jack.
Local Momentary Pushbuttons Provide Silent Soft-Switching of Four Consumer Audio Sources
AN-2209
Description
The RU‑ASX4D Audio Selector allows the user to select one (or none) of four stereo consumer audio sources to feed the power amplifier. Long‑life keyboard‑style momentary pushbuttons activate silent solid‑state audio switching circuits. The active source is quickly ramped up when it is selected, providing an aurally pleasant switching transition. Solid‑state switching results in years of reliable operation free from switch noise and intermittent connections common to many inexpensive unbalanced audio switchers. Each RU‑ASX4D input may be balanced or unbalanced; the RU‑ASX4D may be remote controlled.