Commercial Audio Amplifiers

Atlas Sound MA40G 3-Input, 40-Watt Mixer Amplifier The Atlas Sound MA40G is a 40-watt mixer amplifier engineered for reliability and versatility, making it an ideal choice for distributed business paging, background music (BGM) systems, and small to medium speech privacy systems. This compact amplifier features three inputs, including one balanced mic/line/tel input with phantom power and variable mute sensitivity control, as well as two unbalanced, summing line level inputs. The MA40G's global power supply ensures compatibility with power systems worldwide, making it suitable for various commercial audio applications. As an authorized distributor, Tri-Tek Electronics guarantees full manufacturer warranty coverage, best pricing, and factory support for the Atlas Sound MA40G. Key Features Power Output: 40 watts into a 70.7V/100V line Three Total Inputs: One balanced mic/line/tel input with phantom power Two unbalanced, summing line level inputs Variable VOX Mute Sensitivity Control: For input 1, allowing precise control over audio priority Contact Closure Mute Terminals: Facilitates easy integration with external control systems Removable Level Controls: Features a security cover for "set it and forget it" settings Global Power Supply: 100VAC-240VAC ~ 50/60Hz, ensuring worldwide compatibility Compact Design: 1RU, 1/2 rack size for easy installation in tight spaces Engineered for Reliability: Part of the MA series designed to meet or exceed professional installation standards Specifications Power Output: 40 watts Inputs: 1 x balanced mic/line/tel input with phantom power 2 x unbalanced, summing line level inputs Output Impedance: 70.7V/100V Frequency Response: 50Hz - 20kHz THD: Less than 0.5% Signal to Noise Ratio: >75dB Phantom Power: +24V Power Supply: Global (100VAC-240VAC ~ 50/60Hz) Dimensions: 1.75" (H) x 10" (W) x 7" (D) Weight: 4.4 lbs Installation Scenario In a corporate office environment, the Atlas Sound MA40G can be used to power background music and paging announcements. The balanced mic/line/tel input with phantom power is ideal for connecting a microphone for paging, while the two unbalanced line level inputs can be used for music sources such as a media player. The variable VOX mute sensitivity control ensures that paging announcements can easily override background music. The compact 1RU, 1/2 rack design allows for seamless integration into existing AV racks, providing a clean and professional installation. Benefits for Installers and Technicians Versatile Input Options: Accommodates a variety of audio sources with ease. User-Friendly Controls: Variable mute sensitivity and removable level controls provide precise and secure settings. Global Compatibility: The global power supply ensures the unit can be used worldwide. Compact and Reliable: Small footprint and robust design for easy and dependable installations.

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Atlas Sound MA60G 60-Watt 3-Input Mixer Amplifier with Global Power Supply The Atlas Sound MA60G is a 60-watt mixer amplifier engineered for reliability and versatility, making it the perfect choice for distributed business paging, background music (BGM) systems, and small to medium speech privacy systems. This compact amplifier offers three total inputs, including one balanced mic/line/tel input with phantom power and variable mute sensitivity control, as well as two unbalanced, summing line level inputs. The MA60G features a global power supply, ensuring compatibility with power systems worldwide. As an authorized distributor, Tri-Tek Electronics guarantees full manufacturer warranty coverage, best pricing, and factory support for the Atlas Sound MA60G. Key Features Power Output: 60 watts into a 70.7V/100V line Three Total Inputs: One balanced mic/line/tel input with phantom power Two unbalanced, summing line level inputs Variable VOX Mute Sensitivity Control: For input 1, ensuring precise control over audio priority Contact Closure Mute Terminals: Allows for easy integration with external control systems Removable Level Controls: With a security cover for "set it and forget it" settings Global Power Supply: 100VAC-240VAC ~ 50/60Hz, ensuring worldwide compatibility Compact Design: 1RU, 1/2 rack size for easy installation in tight spaces Engineered for Reliability: Ideal for professional installation in commercial environments Specifications Power Output: 60 watts Inputs: 1 x balanced mic/line/tel input with phantom power 2 x unbalanced, summing line level inputs Output Impedance: 70.7V/100V Frequency Response: 50Hz - 20kHz THD: Less than 0.5% Signal to Noise Ratio: >75dB Phantom Power: +24V Power Supply: Global (100VAC-240VAC ~ 50/60Hz) Dimensions: 1.75" (H) x 10" (W) x 7" (D) Weight: 4.4 lbs Installation Scenario In a retail environment, the Atlas Sound MA60G can be used to power background music and paging announcements. The balanced mic/line/tel input with phantom power is ideal for connecting a microphone for paging, while the two unbalanced line level inputs can be used for music sources like a media player. The variable VOX mute sensitivity control allows the paging microphone to override the music when announcements are made. The compact 1RU, 1/2 rack design ensures it fits seamlessly into existing AV racks. Benefits for Installers and Technicians Versatile Input Options: Accommodates a variety of audio sources with ease. User-Friendly Controls: Variable mute sensitivity and removable level controls provide precise and secure settings. Global Compatibility: The global power supply ensures the unit can be used worldwide. Compact and Reliable: Small footprint and robust design for easy and dependable installations.

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Radio Design Labs EZ-MPA1 Microphone Preamplifier The Radio Design Labs EZ-MPA1 is a high-performance microphone preamplifier designed for professional audio applications. This preamp is engineered to deliver clean, low-noise amplification of microphone signals, making it an essential tool for studios, broadcast environments, and live sound systems. The EZ-MPA1 features user-friendly controls and robust construction, ensuring reliable performance in a variety of settings. Product Features: Amplification: Provides high-gain, low-noise amplification for microphone signals, enhancing audio clarity and signal strength Inputs: Balanced XLR microphone input, compatible with dynamic and condenser microphones Outputs: Balanced XLR and unbalanced RCA line-level outputs, offering flexible connectivity options Phantom Power: Switchable +48V phantom power for condenser microphones Gain Control: Adjustable gain control with a wide range to suit different microphone types and output levels Design: Compact and durable, designed for easy integration into studio racks, broadcast setups, or live sound systems Indicators: LED indicators for power, signal presence, and peak levels to ensure optimal operation Example Installation Scenario The Radio Design Labs EZ-MPA1 is ideal for use in a recording studio where high-quality microphone signal amplification is required. For instance, it can be used to boost the signal from a condenser microphone before sending it to an audio interface or mixer, ensuring that the audio is clear and free from noise. The phantom power feature makes it compatible with a wide range of microphones, adding versatility to your setup. Tri-Tek Electronics: Your Authorized Distributor Tri-Tek Electronics is an authorized distributor of Radio Design Labs products, including the EZ-MPA1 Microphone Preamplifier. Purchasing from us ensures that you receive full manufacturer warranty coverage, competitive pricing, and access to expert factory support. Visit our retail location in Mesa, AZ, to see this preamp in person and consult with our knowledgeable team about your specific audio needs.

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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 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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RDL TX-1W Music on Hold Amp - 1 Watt Features: Feed Audio into Telephone Equipment Music-on-Hold Input Adjustable Audio Level Optimized Sound Quality Unbalanced Output, up to 1 Watt Balanced Transformer driver Output Ultra Compact Size The TX-1W is the ideal choice in on-site installations where the central telephone switching unit needs to be fed with music, voice or combined music/voice signals. There is a wide variety of telephone instruments in use. When a caller is placed on hold, the audio quality perceived is affected by the caller's own telephone, as well as the telephone lines, central switch and on-site equipment. Due to these variations, conventional audio amplifiers used as music-on-hold drivers frequently produce annoying artifacts at the caller's earpiece. Attempts to reduce listener fatigue through high-frequency rolloff alone tend to produce a muffled, tired sound. The TX-1W features a spectral response specifically characterized to match the broadest variations in telephone audio distribution, producing a lively, crisp, interesting sound without the annoying resonances and distortions prone to creating listener fatigue.

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Philmore 80-1105, Amplifier Kit, 17.5 Watt Mono  

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Radio Design Labs HD-PA35UA 35 Watt Power Amplifier - 25, 70, 100 V, with Power Supply Features: One input with front-panel volume control Bass and Treble tone controls Designed as a single zone amplifier Master volume VCA controlled with remote adjustment capability Amplifier output on detachable terminal block Unbalanced summing inputs on RCA jacks Includes power supply Automatic sleep mode meets strictest energy saving standards Download RDL HD-PA35AU Specifications (.pdf) The HD-PA35UA is a single input audio amplifier for systems demanding the highest energy efficiency. It may be used as a single zone amplifier fed from a variety of RDL or OEM mixers. It is ideal for providing one or more additional zones to a mix originating from another RDL HD series mixer amplifier. The 35 watt power amplifier output is driven from a high-efficiency Class D amplifier stage. The amplifier normally shuts down (standby “sleep” mode) when audio is absent and automatically turns on when needed. The amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10k ohm controls. The amplifier provides a constant voltage output (25 V, 70 V or 100 V). The HD-PA35UA is engineered, tested and manufactured in the U.S.A. to strict energy conservation standards. The unit consumes less than 1 watt of mains power in standby mode, and meets power amplifier efficiency specifications with an analog-filtered Class-D digital output stage. The HD-PA35UA provides a front-panel control to set the input gain. An optional remote control connected to the rear-panel RJ45 jack provides for remote adjustment of the output level. The tone controls adjust the equalization at the amplifier output. The presence of a signal at the input causes the HD-PA35UA to fully turn on, activating the power amplifier and all associated equalization and compressor circuitry. When an input signal is absent, a delay timer is initiated. Rear-panel DIP switches are provided to set the power-down delay timer to a value between 10 minutes and 2 hours in 10 minute increments. After the time-out period, the HD-PA35UA enters the sleep mode until an input signal is received. The switches may be set to disable the sleep mode for systems specifying continuous amplifier operation. The amplifier includes an analog compressor/limiter for audio fidelity noticeably superior to conventional class D amplifiers with digital limiting. Increasing the input gain can substantially increase the average output power beyond that of a standard 35 watt amplifier. A red front-panel LED flashes when the compressor is preventing output clipping. Normal audio level signals remain unaffected by the compressor thereby preserving audio dynamics. The audio is compressed according to three dynamic time constants providing aural transparency while maintaining clean, unclipped amplified audio for input overloads of up to 20 dB. The HD-PA35UA, with compression, is capable of producing average audio output levels and clarity normally expected from amplifiers with a much higher output power rating. During power-up and power-down, the amplifier output is protected against clicks, pops and thumping by internal soft-start solid-state switches. A blue POWER LED illuminates when the HD-PA35UA is powered from its external 24 Vdc power supply (included). The power LED is dim when the amplifier is in the standby mode, and is bright when the amplifier is fully active. A front-panel pushbutton is provided to manually cycle between standby and active modes. The power amplifier is equipped with both thermal and output short-circuit protection. The high-efficiency Class D output stage produces minimal heat for all levels of expected voice or music modulation.

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Radio Design Labs EZ-MXA20 20 W Stereo Audio Mixer-Amplifier with EQ Features: Audio Amplifier with Mic and Line Input Mixer 10 Watts RMS Per Channel into 8 Ω 8 Watts RMS Per Channel into 4 Ω Switch-Selectable Load Impedance on Rear Panel Balanced Microphone Input on XLR Unbalanced Line Inputs on RCA Jacks Switch-Selectable Phantom on Mic Input Bass and Treble Tone Control Equalization Integral Overload Limiter with LED Indicator Limiter Controls Overloads from Clipping Advantages: Limiter Produces Output Level Comparable to Higher Power Amp Download RDL EZ-MXA20 User Manual Here (.pdf) The EZ-MXA20 is a stereo mixer amplifier with one mic input and two line inputs. Bass and treble tone controls are included. An integral compressor/limiter allows a higher sound output level without clipping than is possible using a standard amplifier. The output drives 4 or 8 ohm speakers. The EZ-MXA20 is used in houses of worship, restaurants, clubs, meeting rooms and commercial sound systems. 

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Atlas EZSYS-BGM-S Complete Business Music & Paging System for Surface Mount Applications - with Wall Level Controller The EZSYS-BGM-S package is an entire business music and paging system. It is designed for surface-mount installations and includes the proper amplification, system control, and speakers. All you need are audio sources and cables. The box illustrates the proper way to connect the equipment including cable and tool requirements. Kit Includes:    

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Radio Design Labs HD-PA35A 35 Watt Power Amplifier - 25, 70, 100 V, with Power Supply Features: One input with front-panel volume control Bass and Treble tone controls Designed as a single zone amplifier Master volume VCA controlled with remote adjustment capability Amplifier output on detachable terminal block Unbalanced summing inputs on RCA jacks Includes power supply High-efficiency Class D operation Download RDL HD-PA35A Specifications (.pdf) The HD-PA35A is a single input audio amplifier for systems demanding high energy efficiency. It may be used as a single zone amplifier fed from a variety of RDL or OEM mixers. It is ideal for providing one or more additional zones to a mix originating from another RDL HD series mixer amplifier. The 35 W power amplifier output is driven from a high-efficiency Class D amplifier stage. The amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10 kOhm controls. The output provides a constant voltage (25 V, 70 V or 100 V). The HD-PA35A is engineered and manufactured in the U.S.A. The HD-PA35A provides a front-panel control to set the input gain. An optional remote control connected to the rear-panel detachable terminal block provides for remote adjustment of the output level. The tone controls adjust the equalization at the amplifier output. The amplifier includes an analog compressor/limiter for audio fidelity noticeably superior to conventional class D amplifiers with digital limiting. Increasing the input gain can substantially increase the average output power beyond that of a standard 35 W amplifier. A red front-panel LED flashes when the compressor is preventing output clipping. Normal audio level signals remain unaffected by the compressor thereby preserving audio dynamics. The audio is compressed according to three dynamic time constants providing aural transparency while maintaining clean, unclipped amplified audio for input overloads of up to 20 dB. The HD-PA35A, with compression, is capable of producing average audio output levels and clarity normally expected from amplifiers with a much higher output power rating. A blue POWER LED illuminates when the HD-PA35A is powered from its external 24 Vdc power supply (included). The power LED is dim when the mixer amplifier is in the standby mode, and is bright when the amplifiers are fully active. A front-panel pushbutton is provided to manually switch between standby and active modes. The power amplifiers are equipped with both thermal and output short-circuit protection. The high-efficiency Class D output stage produces minimal heat for all levels of expected voice or music modulation.

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