AudioSource AMP Three Stereo Power Amplifier 150WPC A/B Speakers Bridged Mono
Bring powerful, clean audio to your home stereo system with the AudioSource AMP Three, a high-performance vintage stereo power amplifier delivering 150 watts per channel. Featuring dual A/B speaker selection, independent left and right level controls, and automatic signal-sensing power, this amplifier offers impressive versatility for home audio enthusiasts. Its bridged mono mode delivers up to 400 watts, making it an excellent choice for demanding speaker setups. Fully tested, refurbished, and SPENCERTIFIED for reliable everyday listening.
CONDITION
SPENCERTIFIED – Fully certified by Spencer.
Refurbished and SPENCERTIFIED.
100% tested and functional. Cleaned inside and out, with worn components serviced or replaced as needed. Controls, switches, and connections are cleaned with WD-40 Specialist Electrical Contact Cleaner. Internal boards, speaker terminals, and amplifier circuitry are inspected as part of the refurbishment process.
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Cosmetic Condition: Very Good, estimated 9/10
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Functional Condition: 10/10
WHAT'S IN THE BOX?
- AudioSource AMP Three Stereo Power Amplifier
FEATURES
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150 watts RMS per channel in stereo mode
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400 watts RMS in bridged mono mode
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Class AB amplifier design
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Dual-channel stereo amplification
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Speaker A/B selection with independent front-panel switches
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Supports two pairs of speakers with A, B, or A+B operation
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Independent left and right input level controls
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Automatic signal-sensing power on/off
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Manual power operation
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RCA stereo line-level inputs
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RCA line-level pass-through outputs for additional amplifiers or audio equipment
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Rear-panel stereo/bridged mono selection switch
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Heavy-duty, five-way speaker binding posts
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Multicolor LED power status indicator
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High-current power supply with toroidal transformer
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Black metal chassis with a clean, understated appearance
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Suitable for home stereo systems, passive speakers, and multi-speaker setups
SPECIFICATIONS
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Type: Stereo Power Amplifier
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Era: 1990s
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Amplifier Design: Solid-state Class AB
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Channels: 2 (Stereo) / 1 (Bridged Mono)
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Stereo Power Output: 150 watts RMS per channel
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Bridged Mono Output: 400 watts RMS
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Frequency Response: 20 Hz – 20 kHz (±0.5 dB)
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Total Harmonic Distortion: Less than 0.04%
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Intermodulation Distortion: Less than 0.04%
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Signal-to-Noise Ratio: 110 dB
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Input Sensitivity: 0.8 V
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Input Impedance: 30 kΩ
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Dynamic Headroom: 2 dB
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Inputs: 1 pair stereo RCA line inputs
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Line Outputs: 1 pair stereo RCA pass-through outputs
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Speaker Outputs: 2 sets of left/right binding posts (Speaker A and B)
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Speaker Selection: A, B, or A+B
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Power Control: Manual / Automatic Signal Sensing
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Power Requirements: Approximately 117–120V AC, 60 Hz
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Power Consumption: 700 watts (nameplate rating)
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Dimensions: 16.5" W × 4" H × 13.25" D
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Weight: 28 lbs. 5 oz.
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Color: Black
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Made in: Taiwan
ABOUT SPENCERTIFIED
At SpenCertified, we specialize in fully tested and refurbished vintage electronics. Every product undergoes a multi-step inspection process to ensure reliable performance, clean presentation, and satisfaction guaranteed.
