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.
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. 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.
AT1820 Series amps are passively cooled with large heat sinks for efficiency and low noise operation. Featuring toroidal transformers with bi-filar windings ensures low noise and crosstalk, hallmarks of all ATI amplifiers.
SPEC
Remote Trigger: Activated from 3.3VDC to 24 VDC
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 California.
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: Detachable, 3-wire power cord.
FTC Full Bandwidth Power Output@ 8Ω (Watts RMS): 200
FTC Full Bandwidth Power Output@ 4Ω (Watts RMS): 300
Input Sensitivity for Full Rated FTC Output Power - 8Ω: 1.6 Volts
Frequency Response:+0, -.5dB, 5Hz to 20kHz, load independent
Signal-to-Noise Ratio (Ref FTC Rated Power, A-Wtd): >120dB (A-weighted - Ref. 8Ω FTC Power)
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
Voltage Gain (RCA Inputs): 28.5dB ±0.5dB
Voltage Gain (XLR Inputs): 27.5dB ±0.5dB
Slew Rate: >50V/µS
Input Impedance: 20kΩNominal
Output DC Offset: <±15mV
Power Requirements: 117V AC or 230V; 50/60 Hz
Power Consumption (Standby): ≤0.5W (240 VAC)
Power Consumption (Idle): 240VAC; 50/60 Hz
Chassis Dimensions (W x H x D) : 432 x 196 x 448mm
Net Weight: 43.3kg
