Audio Signal Convertors

Radio Design Labs STP-1, Universal Audio Attenuators - 2 Channel The Radio Design Labs STP-1 is a two-channel universal audio attenuator designed to provide precise audio level adjustment. It's equipped with multi-turn trimmers, allowing for fine-tuning without external resistors or jumpers. The STP-1 can operate in high or low impedance, and balanced or unbalanced circuits, making it versatile for various audio setups. It's designed to be cost-effective and eliminates the need for assembling fixed pads. Its connections are designed for easy installation, accepting 14 to 24 gauge wire through a terminal block. For more details, you can visit their product page here.

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Philmore 64-4005, Ground Loop Isolator   Product AttributeProduct Value Weight 3.85 oz   isolates the ground between amplifier and radio   eliminates the ground path which can cause alternator white and ignition   A low level filter which isolates the ground between amplifier and radio Designed to interface with line level outputs Eliminates the ground path which can cause alternator whine and ignition pop It eliminates the noise in the audio line without sacrificing audio fidelity Philmore high quality accessory  

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QVS, FCTK-RCA-R, RCA Coaxial to Toslink Digital Audio Converter Converts Toslink optical into RCA digital coaxial signal. It connects PS3/XBox 360/Blu-ray, CD/DVD player, satellite/cable TV receive or any device with Toslink audio output to sound bar or AV receiver with RCA coaxial audio input port. This S/PDIF digital audio format converter supports PCM, Dolby and DTS multi-channel audio. Includes power adaptor. Note: If need to convert RCA digital coax into Toslink optical, use FCTK-RCA-R. This does not convert S/PDIF Toslink into ANALOG RCA stereo audio.

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QVS Digital S/PDIF to Stereo Analog RCA Audio Converter Converts digital coaxial or digital optical (Toslink) into stereo analog RCA audio. Great for connecting Blu-ray, PS3/4, or Xbox to analog stereo sound system. Supports sampling rate at 32, 44.1, 48 and 96Khz, 24-bit S/PDIF incoming bit stream on left/right channels and electromagnetic noise free transmission. Easy plug and play installation. Includes AC power adaptor. (Input Voltage: 100-240v / Output Voltage: 5vDC 1Amp; Connectors: Toslink/Coaxial Female to Stereo RCA Female) Converts digital coaxial or digital optical (Toslink) into stereo analog RCA audio Works with Blu-ray, PS3/4, Xbox, or analog stereo sound system Includes AC power adaptor  

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Radio Design Labs EZ-MPA1 Microphone Preamplifier - Stereo Output with Compressors The EZ-MPA1 is a microphone preamplifier with front-panel volume control and audio level metering. A front-panel switch engages an audio compressor to control overloads and clipping during high level audio bursts or peaks from the microphone. Dynamic or condenser microphones are both supported with rear-panel switchable phantom voltage. The preamplified mic signal feeds both channels of the line output on RCA or MINI jacks. LED VU metering facilitates easy level adjustment. The EZ-MPA1 is ideal to add microphone inputs to mixers and amplifiers with line inputs. It is used in houses of worship, restaurants, clubs, meeting rooms, educational facilities, conference rooms, studios and commercial sound systems. Features: Balanced Microphone Input on Rear-Panel XLR Switch-Selectable Phantom on Rear Panel Unbalanced Output on MINI or RCA Rear-Panel Jacks Preamp Feeds Left and Right Output Channels Front-Panel Compressor Enable/Disable Switch Audio Compressor Controls Overloads Front-Panel LEVEL Control Dual-LED VU Meter Advantages: Optimized for Dynamic or Condenser Mics Headroom Accomodates High Input Levels Headroom Increases with Lower Gain Settings Compressor Limits Clipping Over Wide Dynamic Range Specifications: Input: 1.2 kΩ balanced on XLR jack, mic-level, -11 dBu max. Level control: Off to 50 dB gain Outputs (2): -10 dBV nominal on RCA jacks or Mini jack, +16 dBV max. without compression, -4 dBV max. with 20 dB compression Frequency Response: 80 Hz to 40 kHz (±1 dB, mic input, -6 dB at 20 Hz with integral high-pass filter) THD+N: < 0.1% (35 Hz to 20 kHz, -50 dBu input) Compression : 20 dB range, switch-selectable CMRR: > 55 dB (20 to 20 kHz) Metering: Dual-LED VU Meter, calibrated to -10 dBV output Phantom: Switch-selectable 24 V (IEC 61938: 2013) Noise: < -65 dB (below -10 dBV output, -50 dBu input) 24 Vdc power supply current: 55 mA (idle), 80 mA (max.), 100 mA (max. with phantom) Case dimensions: 5.75” (14.6 cm)W x 3” (7.6 cm)D Mounting size: 1/3 rack width Package Type: Cardboard Box Package Dimensions: 9.5 x 7 x 2.25 in. Shipping Weight: 0.955 lbs. WEEE weight: 0.56 lbs. Tariff code: 8518.40.2000   Download RDL EZ-MPA1 User Manual (.pdf)

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Radio Design Labs ST-DA3, Line Level Distribution Amplifier - 1x3 The ST-DA3 gives you the advantages of an audio distribution amplifier PLUS you can put it where you need it. The ST-DA3 allows bridging of any audio line, adjusting the gain, and driving up to three high or low impedance, balanced or unbalanced loads. The ST-DA3's wide-band circuitry produces the unsurpassed pure clarity, low-distortion and low-noise for which RDL products are known. The ST-DA3 features RDL's SupplyFlex power input configuration. The module will operate directly from floating 24 VDC or bipolar DC power. If a jumper is connected between the PWR minus terminal and any module ground, the module power becomes ground-referenced.   Input: 20 kΩ balanced or unbalanced Input Signal: -15 dBV to +21 dBu (for +4 dBu output) Maximum Input Level: +24 dBu Outputs (3): 150 Ω balanced or 75 Ω unbalanced Output Signal:   Balanced: +4 dBu nominal balanced; Unbalanced: 6 dB below balanced line level Maximum Output Level: +25 dBu Frequency Response: 10 Hz to 100 kHz (+/- 0.05 dB) THD+N: < 0.002% (unity gain) IMD: < 0.003% (unity gain) Noise below +4 dBu: < -98 dB (unity gain) Headroom: > 20 dB (above +4 dBu) Gain: Unity +/- 17 dB (adjustable) CMRR: > 60 dB (50 Hz to 120 Hz) Power Requirement: GROUND-REFERENCED or FLOATING, 24 to 33 Vdc @ 70 mA    

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Radio Design Labs ST-MX2, 2 Mic or Line Input Mixer - Mic and Line   Key Features Two-Input Audio Mixer Selectable Mic or Line Inputs Simultaneous Mic and Line Outputs Adds Additional Inputs to Existing Mixer Audio Output Dual-LED VU Metering Balanced or Unbalanced Inputs / Outputs Low-Noise and Low-Distortion Performance Interlocking-Adhesive Mounting Tabs Requires 24 VDC Power Supply   The ST-MX2 Two-Channel Audio Mixer with Mic/Line Inputs and Outputs from RDL is a two-channel audio mixer module with selectable microphone or line-level inputs. It can be used for fixed installations in commercial offices, retail stores, schools, medical offices, and general sound reinforcement applications to mix two sources into a mic or line-level input of a power amplifier. The ST-MX2 features dual-LED output meters, and audio-taper, single-turn gain adjustment dials for each input. In addition, interlocking, adhesive mounting tabs are included. A 24 VDC (PS-24AS, USA) power supply (available separately) is required.    

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Radio Design Labs ST-MX3, 3 Line Input Mixer - Line Out   The ST-MX3 is a line-level mixer module in the STICK-ON Series of products. It provides audio mixing of three line-level inputs with individual input gain adjustments. The line-level output is capable of driving either high or low impedance, balanced or unbalanced loads. The ST-MX3 operates from floating or bipolar dc power. For installations with microphone level inputs, use the ST-UMX3 Universal Audio Mixer.   Inputs (3): 30 kΩ balanced or unbalanced bridging Input Level: -20 dBu to +18 dBu (for +4 dBu output) -24 dBu to +14 dBu (for 0 dBu output) Output: 400 Ω to drive low or high impedance balanced or unbalanced lines Output Level: +4 dBu nominal, (adjustable; unbalanced output 6 dB below balanced line level) THD+N: < 0.03% (10 Hz to 20 kHz) Frequency Response: 10 Hz to 20 kHz (+/- 0.5 dB) Noise : < -80 dB (all inputs @ 10 dB gain, referenced to +4 dBu) Headroom: 18 dB Gain (each input): -14 dB to +24 dB (adjustable) CMRR: > 50 dB (50 to 120 Hz) Power Requirement: GROUND-REFERENCED or FLOATING, 24 to 33 Vdc @ 55 mA Ambient Operating Environment: 0° C to 55° C

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Radio Design Labs STA-1M, Audio Line Amp - Mono: -14 to 14 dB Gain   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 differential input, regardless of ground reference. The output is capable of driving either high or low impedance loads, and the output may be connected either balanced or unbalanced.RDLs SupplyFlex power input configuration is included in the STA-1M. The power supply input may be fed from a floating (not ground-referenced) 24 Vdc power source, from a bipolar power supply (+/ 12 Vdc or +/-15 Vdc) or from a ground-referenced 24 Vdc power supply.   Details Frequency Response 10 Hz - 20 kHz Impedance 10 k ohm Sensitivity 50 dB Color Black Number of Channels 1 Universal Product Identifiers Brand RDL Part Numbers 20490, 813721010988, STA-1M, STA1M, Sta-1m GTIN 00813721010988    

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Radio Design Labs STA-2A, Dual High Gain Line Amps   Features: Up to 24 dB Gain in Audio Lines Conversion between Unbalanced and Balanced Conversion between High and Low Impedance Low-Impedance, High-Current Line Drivers Dual-Channel Line-Level Preamplifiers High Gain, High Output, High Performance RDL® SupplyFlex™ Power Input Configuration   The STA-2A is a dual-channel, line-level audio preamplifier. Each channel is identical. The audio inputs are bridged at 20 kΩ and accept either an unbalanced or a balanced audio signal. Gain is adjustable from unity to +24 dB using a 25-turn precision audio taper trimming potentiometer. The output line driver circuits are designed to drive long balanced audio lines into 600 Ω loads. The STA-2A features wideband circuitry for excellent phase response, low noise, low distortion and exceptional audio clarity. RDL's SupplyFlex power input configuration is included in the STA-2A. The power supply input may be fed from a floating (not ground-referenced) 24 Vdc power source, from a bipolar power supply (+/- 12 Vdc or +/-15 Vdc) or from a ground-referenced 24 Vdc power supply. Many audio products provide optimum performance when feeding into a bridging input, but may not provide the output needed to directly drive low-impedance lines terminated with 600 Ω transformers. The STA-2A is specifically designed for such installations, and is also ideal in installations requiring high gain in line-level audio transmission.   Amps per STA-2A: 2 identical circuits (stereo or dual mono operation) Inputs (2): 20 kΩ balanced or unbalanced Input Signal (for +4 dBu out): -20 dBu (-18 dBV) to +18 dBu Maximum Input Level: +24 dBu Outputs (2): 150 Ω balanced or 75 Ω unbalanced Output Signal:   Balanced: +4 dBu nominal   Unbalanced: 6 dB below balanced line level Maximum Output Level: +25 dBu Frequency Response: 10 Hz to 100 kHz (± 0.05 dB) THD+N: < 0.004% (unity gain) IMD: < 0.005% (unity gain) Noise below +4 dBu: < -90 dB (unity gain) Crosstalk: < -80 dB (unity gain) Headroom: > 20 dB (above +4 dBu) Gain: Unity +24 / -14 dB (adjustable) CMRR: > 60 dB (50 Hz to 120 Hz) Ambient Operating Environment: 0° C to 55° C Power Requirement: GROUND-REFERENCED or FLOATING, 24 Vdc @ 50 mA Package Type: Cardboard Box Package Dimensions: 2 x 2 x 4 in. Shipping Weight: 0.2 lbs. WEEE weight: 0.145 lbs. Tariff code: 8543.70.9960

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Radio Design Labs STD-150, Passive Audio Divider/Combiner - 150 Ohm Features: 150 Ω Operation Combine Audio Signals to a Single Output Filter RF from an Audio Line Combine Stereo Signals Feed a Mono Signal to Stereo Inputs Combine Multiple Mics to a Single Amp Compactness of RDL STICK-ONs® 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 output shorting switches into a single amplifier input. The STD modules are available in 150 Ω, 600 Ω and 10 kΩ models. All inputs and outputs are balanced.   Circuit Type: Passive Circuit Configuration: Balanced Input/Output Impedance: 150 Ω Number of Inputs / Outputs: 4 total; usable in any combination; split1 in to 3 out; 2 in to 2 out; 3 in to 1 out Insertion Loss: 3 dB Isolation Between Channels: 3 dB (use RDL mixers or distributionamps for isolation) Maximum Signal Input: +22 dBu Power Requirement: Passive (not required) Package Type: Cardboard Box Package Dimensions: 2 x 2 x 4 in. Shipping Weight: 0.185 lbs. WEEE weight: 0.135 lbs. Tariff code: 8543.70.9960

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Radio Design Labs STM-2, Adjustable Gain Microphone Preamplifier - 35 to 65 dB gain   Features: Low-Noise Mic Preamp Adjustable Output Level High or Low Impedance Mic Inputs Mic Input to 2 Line Outputs Two Balanced or Unbalanced Outputs Phantom Capability RF-Filtered Inputs   Input: 500 Ω balanced; 5 kΩ unbalanced Phantom: 24 Vdc; IEC 61938: 2013, Filtered Outputs (2): +4 dBu 150 Ω balanced; -10 dBv unbalanced Frequency Response: 50 Hz to 30 kHz (± 1.5 dB) Gain: Adjustable 35 to 65 dB THD+N: < 0.05% (50 dB Gain) CMRR: >50 dB (50 Hz to 20 kHz) Residual Noise: < -70 dB (below +4 dBu 150 Ω source @ 50 dB gain) Headroom: > 20 dB (24 Vdc supply); > 14 dB (12 Vdc supply) Phantom Power Input: 24 to 33 Vdc @ 10 mA maximum Power Requirement: GROUND-REFERENCED, 24 to 33 Vdc @ 25 mA Ambient Operating Environment: 0° C to 55° C Dimensions: Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in. (3.9 cm) Package Type: Cardboard Box Package Dimensions: 2 x 2 x 4 in. Shipping Weight: 0.195 lbs. WEEE weight: 0.145 lbs. Tariff code: 8543.70.9960

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