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Radio Design Labs
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Radio Design Labs TX-1A
Radio Design Labs TX-1A Balanced to Unbalanced Transformer - Adjustable
MFR # TX-1A UPC # 813721011404
  • Transformer Isolation
  • Adjustable Output
  • 10KΩ Bridging or 600Ω Terminated
  • 20Hz-20kHz Frequency Response
  • Terminal Block Connections

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In Stock
$36.66
You Pay: $36.66
Radio Design Labs STM-2
Radio Design Labs STM-2 Adjustable Gain Microphone Preamplifier
MFR # STM-2 UPC # 813721011053
  • 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

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$141.08
You Pay: $141.08
Radio Design Labs ST-MX3
Radio Design Labs ST-MX3 3 Channel Audio Mixer - Line Input and Output
MFR # ST-MX3 UPC # 813721011015
  • Mix Line-Level Signals
  • Three Adjustable Inputs
  • Add Additional Inputs to Mixer
  • Combine Signals of Different Level
  • Isolation Between Input Signals
  • Low-Noise & Low-Distortion

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$123.33
You Pay: $123.33
Radio Design Labs STP-1
Radio Design Labs STP-1 Universal Audio Attenuator - 2 Channel
MFR # STP-1 UPC # 813721011268
  • Audio Level Attenuation
  • Adjust Audio Level into Equipment
  • Preset Audio Levels
  • Precisely Match Audio Levels
  • Increase Audio Input Headroom
  • 2 Adjustable Attenuators in 1 Package

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$59.20
You Pay: $59.20
Radio Design Labs ST-ACR1
Radio Design Labs ST-ACR1 Line-Level Audio Controlled Relay - 0.5 to 5 s
MFR # ST-ACR1 UPC # 813721011152
  • Switching Controlled by Audio Signal
  • Sensing of Line-Level Signal
  • Silence Sensing
  • DPDT Switching Contacts
  • Open-Collector Slave Output

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$97.46
You Pay: $97.46
Radio Design Labs STD-150
Radio Design Labs STD-150 Passive Audio Divider/Combiner - 150 Ω
MFR # STD-150 UPC # 813721011237
  • 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

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$54.45
You Pay: $54.45
Radio Design Labs D-SH1
Radio Design Labs D-SH1 Stereo Headphone Amplifier (White)
MFR # D-SH1 UPC # 813721014825
  • 1/4" Headphone Jack
  • Long-Life VCA Stereo Level Control
  • Balanced or Unbalanced Inputs
  • Selectable Input Sensitivity
  • Selectable Mono (Left) or Stereo
  • Standard Decora Wall Plate
  • Fits WB-1U & WB-2U Wall Boxes
  • White/Gray Finish

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$142.22
You Pay: $142.22
Radio Design Labs ST-SSR1
Radio Design Labs ST-SSR1 Line-Level Audio Switch - 2x1
MFR # ST-SSR1 UPC # 813721011190
  • Switch Line Level Sources
  • Select Between Two Balanced Lines
  • Silent Audio Switching
  • Switching Without Hard Relay Contacts
  • Fast Switching for Audio Muting
  • Selection by Open-Collector Logic

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$104.75
You Pay: $104.75
Radio Design Labs TX-10B
Radio Design Labs TX-10B Bridging Input Transformer
MFR # TX-10B UPC # 813721011435
  • Add Transformer Isolation
  • To Any Line-Level RDL Product Input
  • 20Hz-20kHz Frequency Response
  • Balanced Input & Output
  • Terminal Block Connections

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In Stock
$40.78
You Pay: $40.78
Radio Design Labs ST-ACR2
Radio Design Labs ST-ACR2 Line-Level Audio Controlled Relay - 5 to 50 s Delay
MFR # ST-ACR2 UPC # 813721011176
  • Switching Controlled by Audio Signal
  • Sensing of Line-Level Signal
  • Silence Sensing
  • DPDT Switching Contacts
  • Open-Collector Slave Output

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$96.12
You Pay: $96.12
Radio Design Labs STD-10K
Radio Design Labs STD-10K Passive Audio Divider/Combiner - 10 kΩ
MFR # STD-10K UPC # 813721011251
  • 10 kΩ 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

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$54.94
You Pay: $54.94
Radio Design Labs STM-1
Radio Design Labs STM-1 Microphone Preamplifier
MFR # STM-1 UPC # 813721011046
  • High or Low Impedance Input Mic Preamp
  • Fixed 50 dB Gain for Consistency
  • Balanced or Unbalanced Output
  • Phantom Capability
  • RF-Filtered Inputs and Outputs
  • Excellent Performance
  • Stick-On Convenience

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$102.96
You Pay: $102.96
Radio Design Labs ST-MX2
Radio Design Labs ST-MX2 2 Channel Audio Mixer
MFR # ST-MX2 UPC # 813721012234
  • 2 Input Audio Mixer
  • Mic or Line Level Inputs
  • Mic & Line Level Outputs
  • Add Inputs to a Mixer
  • Dual-LED VU Metering
  • Balanced or Unbalanced I/O
  • Low-Noise & Low-Distortion

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$133.73
You Pay: $133.73
Radio Design Labs FP-ALC2
Radio Design Labs FP-ALC2 Automatic Level Control (Stereo)
MFR # FP-ALC2 UPC # 813721012548
  • RCA Jack I/O
  • Consistent Volume Levels
  • Self-Adjusting Attack & Release
  • Split-Band AGC
  • Flat-Pak Convenience

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$243.08
You Pay: $243.08
Radio Design Labs STD-600
Radio Design Labs STD-600 Passive Audio Divider/Combiner - 600 Ω
MFR # STD-600 UPC # 813721011244
  • 600 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

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$54.61
You Pay: $54.61
Radio Design Labs AV-HK1
Radio Design Labs AV-HK1 Hum Killer Transformer (RCA)
MFR # AV-HK1 UPC # 813721013569
  • Stereo Audio Isolation Transformer
  • Dual RCA Inputs and Outputs
  • Ground Isolation in Unbalanced Line
  • Ground-Loop Elimination
  • Unbalanced Stereo Galvanic Isolation
  • Isolation in Rugged Field Case
  • Portable or Permanent Isolation Module

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$87.96
You Pay: $87.96
Radio Design Labs STM-3
Radio Design Labs STM-3 High Gain Microphone Preamplifier
MFR # STM-3 UPC # 813721011060
  • Low-Noise, High-Gain, Mic Preamp
  • Adjustable Output Levels
  • High or Low Impedance Mic Inputs
  • Mic Input to Line Outputs
  • 2 Balanced or Unbalanced Outputs
  • Phantom Capability
  • RF-Filtered Inputs

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In Stock
$161.76
You Pay: $161.76
Radio Design Labs ST-LCR1
Radio Design Labs ST-LCR1 Logic Controlled Relay - Momentary
MFR # ST-LCR1 UPC # 813721011138
  • Add Contacts to Any Control Signal
  • Activation from Logic Circuits
  • DPDT Switching Relay
  • Open-Collector Switching
  • Control from Switch, Button or Logic Circuits

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$74.82
You Pay: $74.82
Radio Design Labs ST-UMX3
Radio Design Labs ST-UMX3 3x1 Universal Audio Mixer
MFR # ST-UMX3 UPC # 813721012265
  • Audio Mixing with Up to 3 Inputs
  • Switchable Mic or Line Inputs
  • Switchable Mic or Line Output
  • Add Inputs to an Existing Mixer
  • Combine Different Types of Signals

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$132.81
You Pay: $132.81
Radio Design Labs EZ-MX4L
Radio Design Labs EZ-MX4L Stereo Line-Level Audio Mixer (North American Power Supply)
MFR # EZ-MX4L UPC # 813721010117
  • Mix Four Line-Level Stereo Sources
  • Gold-Plated RCA Input & Output Jacks
  • 1/3 Rack Space Size
  • 2-Segment LED VU Meters on Stereo Output
  • 1/8" Mini Input & Main 1/8" Mini Output
  • Made in the USA
  • North American Power Supply

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$153.40
You Pay: $153.40
Radio Design Labs TX-AT1
Radio Design Labs TX-AT1 Audio Isolation Transformer - 600 Ω 1:1
MFR # TX-AT1 UPC # 813721016102
  • Studio Quality Transformer
  • Terminal Block Connections
  • Galvanic Isolation
  • 1:1 Transformer Coupling
  • Transformer to Drive 600 Ohm Line
  • Convenience of RDL TXs
  • 20Hz-20kHz Frequency Response

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$86.87
You Pay: $86.87
Radio Design Labs PT-AMG2
Radio Design Labs PT-AMG2 Portable Audio Signal Generator & Monitor
MFR # PT-AMG2 UPC # 813721013545
  • Audio Generator, Meter & Monitor
  • Mic & Line-Level Audio
  • Tone Oscillator with Metering
  • Selectable Mic/Line-Level I/O
  • Balanced and Unbalanced I/O
  • Operation from Battery or AC

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$296.11
You Pay: $296.11
Radio Design Labs ST-SH2
Radio Design Labs ST-SH2 Stereo Headphone Amplifier
MFR # ST-SH2 UPC # 813721012227
  • Stereo Headphone Amp
  • Provision for External Stereo Level Control
  • Balanced or Unbalanced Input
  • Bridge a Line and Feed Headsets
  • Drives High or Low Impedance Headsets

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In Stock
$123.69
You Pay: $123.69
Radio Design Labs RU-MX4
Radio Design Labs RU-MX4 Professional 4 Channel Microphone/Line Mixer with Phantom Power
MFR # RU-MX4 UPC # 813721013064
  • 4 Channel Audio Mixer
  • XLR Microphone Inputs
  • Phono Jack Line Inputs
  • Switchable 24V Phantom
  • Switchable Mic/Line XLR Output
  • Unbalanced Line Out & Direct In
  • Switchable Compressor/Limiter
  • Studio-Quality Performance

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In Stock
$316.42
You Pay: $316.42
Recording & Studio: 1-24 of 245
Radio Design Labs
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Radio Design Labs Performance Audio is an Authorized Radio Design Labs Reseller.
RDL is the world's premier manufacturer of high-quality audio, video and control modules. The concept of application-specific modules was first introduced by RDL more than twenty years ago... a concept promoting unsurpassed value and performance. A concept which has attained widespread popularity and is a proven success in many thousands of facilities around the world. As the inventor of application-specific modules, RDL continues to lead the industry with solutions to specific problems as well as building blocks of quality system designs.
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Why Choose Performance Audio?

35+ Years in the Business

Performance Audio isn't new to Pro Audio & Video. We have been servicing the needs of professionals for nearly 40 years! We have the expertise to help you get the job done right. The first time.

Real World Convenience

Performance Audio has built lasting relationships with the brands you love! We have decades of experience working with our suppliers. We are equipped to get you what you need, when you need it. When you need it.

Staff with Know-How

Performance Audio has long believed that experience and knowledge are vital to building relationships with our customers. We focus on getting, and keeping, a staff who know and love the Pro Audio & Video world. People like you.

Prices That Don't Suck

Performance Audio is one of the largest suppliers of professional audio & video gear in the Mountain West. We have one of the largest inventories in the industry. That means we can save you money! The right price.

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