Current Feedback Balanced Class AB topology
Simple & Straight Forward Design
Dual-Differential Gain Stage

2 channels up to 7 channels
200W per channel into 8Ω
22,400uF power supply capacitance per channel

ATI AT1820 SERIES AMPLIFIER

Beginning with the the two-channel AT1822 to the seven-channel AT1827, all AT1820 Series amplifiers feature ATI’s Soft Turn-on protection. The Soft Turn-on circuit gradually powers up the amp to avoid tripping the circuit breaker or dimming the lights. At the back of the amplifier, an RCA unbalanced input, an XLR Balanced input, input selection switch and a pair of gold-plated, 5-way binding post outputs support each channel.

Current Feedback Balanced Class AB topology
Simple & Straight Forward Design
Dual-Differential Gain Stage

2 channels up to 7 channels
200W per channel into 8Ω
22,400uF power supply capacitance per channel

Amplifier Technologies AT1820 Series amplifiers meet the needs of home audio systems from two channel to home theater. Simple and straightforward in design, the ATI AT1820 series offers models from 2 to 7 channels per chassis. AT1820 Series amps deliver 200 watts per channel to 8 ohms and 300 watts per channel to 4 ohms and offer tremendous value, performance, and reliability.

There is also a 1/8” mono mini jack for +12V trigger, a gold-plated chassis ground lug, a fuse holder and an IEC 20 Amp inlet for the provided detachable power cord.

The supplied power cord will have either: a NEMA 5-15 plug (Type B) for use in the USA, a BS 1363 (Type G) plug for use in the UK, or a Schuko (Type F) plug for use in the EU and the rest of the world.

Specifications

Audio

Numbers of Channels
2 to 7

Full Bandwidth Power Output into 8Ω (FTC)
200WRMS

Full Bandwidth Power Output into 4Ω (FTC)
300WRMS

Frequency Response:
+0, -.5dB, 5Hz to 20kHz, load independent

Power Bandwidth (FTC)
+0,-3 dB 5Hz – 100kHz

Phase Response:
+5 to -15°, 20Hz – 20kHz @ 1W

Input Sensitivity for Full Rated FTC Output Power – 8Ω:
1.6 Volts

Signal-to-Noise Ratio (Ref FTC Rated Power, A-Wtd):
>120dB

Total Harmonic Distortion + Noise (20Hz – 20kHz):
<0.03%

Intermodulation Distortion:
<0.03%

Recommended Load Impedance:
8Ω Nominal, Stable into 4Ω

Damping Factor:
>400 from 10Hz to 400Hz

Crosstalk:
>-100dB from 20Hz to 20kHz

Gain
28.5dB ±0.5dB (RCA)
27.5dB ±0.5dB (XLR)

Slew Rate:
>50V/µS

Input Impedance:
28kΩ

Output DC Offset
<±15mV

Physical

Chassis Dimensions (W x H x D) mm:
AT1822-AT1824: 432 x 196 X 372
AT1825-AT1827: 432 x 196 x 448

Shipping Weight (kg):
AT1827: 48.6
AT1826:
AT1825: 92
AT1824:
AT1823: 26.4
AT1822: 23.2

Electrical

Remote Trigger
Activated from 3.3VDC to 24 VDC via a heavy-duty relay

Protection Circuits
Optically – coupled with full automatic reset

Toroid Transformers
40% more efficient than EI type. Separate bi-filar windings for each channel guaranty lower noise and crosstalk

Circuit Boards
Double-sided, FR-4 glass-epoxy, computer-grade boards are assembled in-house

Soft Start Circuitry
Ultra soft turn on reduces in-rush current to a minimum. Multiple units can be turned on without tripping circuit breakers eliminating the need for sequencing

Power Transistors
High-current, bi-polar and ThermalTrak™ output transistors insure optimized performance in real-time

Power Supply Capacitance
22,400uF per channel

Power Cord
Dual detachable, 3-wire cord.

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