Integra ADM-20.4 Brochure

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ADM-20.4

2 Channel Amplier

xpand your A/V receiver’s audio distribution capabilities in the home theater and beyond with this

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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 anti­resonant 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, heavy­duty 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.

INSPIRED BY PASSION - DRIVEN BY EXCELLENCE

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Specications

Amplier Section

Power Output: 75 W/Ch at 8 Ohms, 1 kHz, 0.08%,

2 Channels Driven, FTC

65 W/Ch at 4 Ohms, 1 kHz, 0.08%,

2 Channels Driven, FTC

THD (Total Harmonic Distortion): 0.08% (Rated Power)

Damping Factor: 60 (Front, 1 kHz, 8 Ohms)

Input Sensitivity and Impedance: 870 mV/20 k-Ohms (Unbalanced)

Rated RCA Output Level
and Impedance : 0.87 V/270 Ohms (Line Out)

Frequency Response: 10 Hz–100 kHz/+0 dB, -3 dB

Signal-to-Noise Ratio: 110 dB (Line, IHF-A)

Speaker Impedance: 4 Ohms–16 Ohms

ADM-20.4

2 Channel Amplier

General

Power Supply: AC 120 V~, 60 Hz

Power Consumption: 160 W

No-Sound Power Consumption: 45 W

Standby Power Consumption: 0.5 W

Dimensions (W x H x D): 17 1/8˝ x 5 1/2˝ x 12 1/2˝
(435 x 139 x 317 mm)

Weight: 17.6 lbs. (8.0 kg)

Carton

Dimensions (W x H x D): 22 1/2˝ x 10 3/8˝ x 16 1/2˝
(572 x 264 x 419 mm)

Weight: 21.6 lbs. (9.8 kg)

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139

[5 1/2˝ ]

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360

[17 1/8˝ ]

435

Due to a policy of continuous product improvement, Integra reserves the right to change specications and appearance without notice. WRAT is a trademark of Onkyo Corporation. All other
trademarks and registered trademarks are the property of their respective holders.

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INSPIRED BY PASSION - DRIVEN BY EXCELLENCE

www.integrahometheater.com