Specifications

ADM-20.4
R
INSPIRED BY PASSION - DRIVEN BY EXCELLENCE
2 Channel Amplier
E
xpand your A/V receiver’s audio distribution capabilities in the home theater and beyond with this
powerful two-channel WRAT component, featuring auto power on and Three-Stage Inverted Darlington
Circuitry.
Advanced Features
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75 Watts per Channel at 8 Ohms, 1 kHz, 0.08% THD, 2 Channels Driven, FTC
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WRAT (Wide Range Amplier Technology)
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Three-Stage Inverted Darlington Circuitry to Reduce Distortion
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All Discrete Output Stage Circuitry
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Heavy Duty EI Transformer
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Two Large 10,000 μF Capacitors for Effective Power Supply
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Low-Impedance Copper Bus Bars for Perfect Ground Potential
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High-Current, Low-Impedance Drive
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Flat, High-Rigidity, 1/16” (1.6 mm) Anti-Resonant Chassis
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Multi-Zone Audio Capability with Line-In and Line-Out
Other Features
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12 V Trigger Input and Output with Audio Switch
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Banana Plug-Compatible, Color-Coded Speaker Posts
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Input Level Adjustment on Rear Panel
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Auto Standby On/Off Switch
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Aluminum Front Panel with Power Light
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Impedance Selector Switch (4-8 Ohms and 8-16 Ohms)
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Optional Rack Mount Kit Available IRK-120-3A
Three-Stage Inverted Darlington Circuitry
An important upgrade to the core WRAT concept is Integra’s Three-Stage Inverted
Darlington Circuitry, a low negative feedback topology featuring a discrete triple
transistor array to cut distortion and boost current ow to the speakers. As well as
improving efciency, transient response, and audio clarity, discrete transistors run
cooler, extending the life of your output stage for more years of trouble-free service.
All-Analog Circuitry Delivers Ultra-Clear
Sound
A standard integrated amplier has the dual task of both processing and amplifying
audio signals, and is therefore susceptible to interference from digital circuitry. As
a dedicated power amp with all-analog circuitry, the ADM-20.4 is protected against
digital interference. When partnered with a quality pre-processor, this unit offers all the
benets of pure analog amplication: a warm, musical, and full-bodied sound.
High Output Power Supply
From input to output, signal purity is maintained at every stage. Housed in a rigid anti-
resonant steel-plate chassis and nished with a tough one-piece aluminum front panel,
the ADM-20.4 is highly resistant to vibration. A massive EI transformer delivers a
steady supply of power to the speakers, while two large 10,000 μF capacitors, heavy-
duty transistors, and low-impedance copper bus bars work in concert to enhance the
power and delity of your audio sources. A heavy-duty aluminum heat sink keeps the
unit running cool for superior reliability and longer life.
User-Friendly Features and Better
Performance
The ADM-20.4 sports banana plug-compatible speaker posts to ensure a positive
connection to the loudspeakers of your choice. The unit is also equipped with
selectable audio or 12 V triggers—providing automatic power on/off with your home
theater system—plus a rearside level adjustment. A pair of line-in and line-out ports
provide the multi-room capabilities to which this amplier is perfectly suited.