Products, RDL

RDL ST-PH1
Stereo Phono Preamp

The ST-PH1 is a stereophonic phono preamplifier. Each of the two channel circuits is identical. The ST-PH1 has standard 47 kΩ impedance unbalanced phono cartridge inputs. Equalization follows the RIAA curve. Each output is capable of driving balanced or unbalanced, high or low impedance loads.…

RDL ST-RX2
Audio Routing Switcher

The ST-RX2 has a single line-level audio input and two line-level audio outputs. In the absence of a control input, the NORMAL module output is fed from the audio input. When the TRIG control terminal is connected to ground, the input audio is fed to the SELECT output and the NORMAL output is…

RDL FP-BUC2
Balanced to Unbalanced Converter

The FP-BUC2 is the ideal choice for connectorized conversion from balanced to unbalanced audio. This module features two identical active (transformerless) channels. Gold contact XLR jacks are utilized for the balanced input channels. Each output is unbalanced, connected through a gold-plated phono…

RDL HR-ADC1
Analog to Digital Converter

The HR-ADC1 is a broadcast quality A/D converter that provides exceptional audio accuracy and clarity with any audio source or style. Superior analog performance fine tuned through audiophile listening practices produces very low distortion (0.0006%), exceedingly low noise (-135 dB) and remarkably…

RDL SF-BNC2
Bidirectional Unbalanced Stereo Audio Network Interface - Dante

The SF-BNC2 is a bidirectional Dante audio network interface. It features two unbalanced audio inputs (left and right) on RCA or stereo 3.5 mm Mini-jack connectors, as well as two unbalanced audio outputs (left and right) on RCA and stereo 3.5 mm Mini-jack connectors. Special software is not…

RDL HR-MCP2
Dual Channel Mic Compressor

The Radio Design Labs HR-MCP2 dual-channel microphone compressor offers full studio-quality low-noise performance at any gain setting while delivering a consistent audio output level over wide variations (up to 25 dB) in the microphone input level. Rear-panel switches let you set each output to mic…

RDL ST-VOX1
Audio Control, Vox Relay

The ST-VOX1 is an Audio Controlled Relay in the STICK-ON® series. When used in intercom or talkback applications, the ST-VOX1 may be triggered directly from an unbalanced microphone. In many such installations the microphone or other audio source must be preamplified, making the ST-VOX1 an…

RDL HR-DAC1
D to A Converter - 24 Bit / 192 kHz

The HR-DAC1 is the ideal choice in installations requiring high quality analog audio from an AES/EBU, AES-3ID or S/PDIF digital audio source. The HR-DAC1 automatically detects a valid input on any of the four input jacks: S/PDIF optical, S/PDIF coaxial, AES-3ID or AES/EBU. The AES/EBU input is 110…

RDL TX-J2
Unbalanced Input Transformer

The RDL TXJ2 is an unbalanced-to-balanced transformer with two unbalanced RCA inputs and one balanced screw terminal output.Features: • Mix two unbalanced audio signals to mono balanced • Combine stereo into mono with balanced output • Unbalanced to balanced conversion without gain…

RDL STP-1
Dual Attenuator

The STP-1 is a pair of convenient attenuator pads that can be located at the precise location that attenuation is needed. The low-cost STP-1 eliminates the costly labor of figuring and assembling fixed pads. Multi-turn trimmers in the STP-1 permit precise adjustment of levels without the need to…

RDL STD-150
Divider / Combiner

Each STD module is a resistive branching network with RF filtering on each of the four channels. Any channel, A through D, may be either an input or an output. This permits combining stereo signals into mono inputs, splitting mono signals to multiple inputs, and even combining microphones with…

RDL SM-K12
Stick On Mounting Strip

The SMK-12 allows removable surface or edge mounting of RDL Stick-Ons onto a panel with velcro fasteners. Panel attaches to surface with screws or foam adhesive pads.

RDL ST-ACR1
Audio Controlled Relay - Line Level Input

The ST-ACR1 is an Audio Controlled Relay in the STICK-ON® series. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-ACR1 is designed to switch on line level sources. Two multiturn trimmers are provided. The SENS…

RDL ST-UBA2
Interface Amplifier, Unbalanced to Balanced

The Radio Design Labs STU-BA2 two-channel interface amplifier is used in any application requiring conversion from unbalanced consumer format signals to professional +4 dBu. It may be used to balance audio from CD players, cassette decks, computer sound cards, televisions, and a wide variety of…

RDL TX-1A
Line Transformer

The TX1A provides transformer isolation between balanced line and unbalanced input, and sports a level trim pot that adjusts output 4 to 24 dB below input level. Input may be 10 k ohms bridging or 600 ohms terminated. It boasts a frequency response of 20 Hz to 20 kHz (+/- 0.5 dB) and < 0.05% (1…

RDL ST-SH2
Stereo Headphone Amplifier

The ST-SH2 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. For fixed level installations not requiring user volume control, the ST-SH2 is wired to the audio source and to a headphone jack. Frequently, it is desirable to mount a…

RDL HR-DSX4
Digital Audio Selector

The RDL HR-DSX4 is the ideal choice in installations requiring high quality source selection between digital audio signals, offering solid-state switching to select one of four inputs. Each input may be fed through one of three jacks: S/PDIF optical, S/PDIF (or AES-3ID) coaxial or AES/EBU. The…

RDL FP-PA20
Audio Power Amplifier 8 OHM Output

The FP-PA20 features a balanced line level input that may be connected unbalanced. A front panel gain control is designed to be adjusted either manually or with a trimming screwdriver. The gain range will accommodate standard unbalanced levels as well as professional balanced levels. The output…

RDL STD-10K
Divider / Combiner

Each STD module is a resistive branching network with RF filtering on each of the four channels. Any channel, A through D, may be either an input or an output. This permits combining stereo signals into mono inputs, splitting mono signals to multiple inputs, and even combining microphones with…

RDL RU-AVX4
Audio Video Switcher

The RDL RU-AVX4 switches one output between four sets of audio L/R and video consumer RCA inputs, with front-panel durable pushbuttons and rear panel terminal block connections for remote operation. Video signal quality, audio performance and pushbutton durability are equal to that found in…

RDL ST-OSC2A
Osillator, 1 KHZ/10 KHZ

Each of the ST-OSC2 products is a Dual Audio Oscillator. These products are designed for quick, convenient installation, and reliable operation in a variety of audio applications. The ST-OSC2 products feature RDL's SupplyFlex power input configuration. The module will operate directly from floating…

RDL HR-UDC1
Universal Digital Audio Converter

The RDL HR-UDC1 is the ideal choice in installations where digital audio signals must be converted between consumer and professional formats. The input and output support AES/EBU, S/PDIF and AES-3ID formats. The HR-UDC1 automatically detects a valid input on any of the four input jacks: S/PDIF…

RDL STA-1M
Audio Line Amp

The STA-1M allows bridging any audio line, adjusting the gain, and driving a balanced or unbalanced line. The circuit design allows the input to accept either balanced or unbalanced signals, of either high or low impedance. This is an instrumentation type input stage which will amplify the…

RDL STA-1
Interface Amplifier

The STA-1 is a dual-channel line-level preamplifier with bridging inputs, adjustable gain or loss, and low-impedance outputs. Each of the two identical circuits is both an electronic line transformer and a line amplifier. Hook up the STA-1 just like a pair of audio transformers with gain. True dc…

RDL STM-1
Mic Preamp

The STM-1 is a low-cost quality microphone preamplifier designed for use in commercial sound and broadcast applications. The compact size makes it ideal where a larger or heavier preamp cannot be used. The high-performance circuit provides a fixed 50 dB gain to bring any mic-level signal up to the…