ATI Amplifier Technologies AT1827

The ATI AT1827 Power Amplifier: A Top-of-the-Line Model for Home Theater

With its seven channels and Class A/B amplification, this amplifier can deliver 200 W into 8 Ω and 300 W into 4 Ω on each channel. It’s the perfect choice for powering even the most demanding speakers in your home theater system. With RCA and XLR inputs, the ATI AT1827 can easily be paired with any home theater preamplifier.

Unmatched Design and Performance

The ATI AT1827 is built with a sturdy, robust chassis, ensuring optimal protection against electromagnetic interference. The rear panel features RCA and XLR inputs for each channel, allowing seamless integration with any home theater amplifier equipped with a pre-out. The amplifier can be powered on manually using the front panel button or automatically via a trigger input, synchronizing its power state with the associated preamplifier.

Unleash the Power of Your Speakers

With its impressive output power of 7 x 200 W at 8 Ω per channel, the ATI AT1827 provides optimal power to your front speakers, which often require high power. Additionally, it can effortlessly drive surround and Atmos speakers, thanks to its robust toroidal power supply and high-quality components. The amplifier’s response range extends from 5 Hz to 20 kHz (+/- 0.5 dB), ensuring accurate and dynamic sound reproduction. With total harmonic distortion (THD) below 0.03% and input gains of 28.5 dB (RCA) and 27.5 dB (XLR), the ATI AT1827 delivers precise, faithful, and dynamic audio performance.

Uncompromising Power Supply

The ATI AT1827 is proudly made in the USA at ATI’s state-of-the-art facilities in California. The amplifier’s power supply features two toroidal transformers, providing dedicated windings for each channel. These transformers, coupled with bifilar windings and a silicon steel core, minimize noise and crosstalk, enabling accurate and transparent sound reproduction. Each channel also benefits from its own rectifier circuit and high-capacity capacitors (22,400 uF per channel), ensuring that the amplifier can handle even the most demanding audio signals from the preamplifier.

• Number of channels: 7
• Class AB amplification

Measurements

• Output power:
  • 8Ω - Full bandwidth: 200 W RMS
  • 4Ω - Full bandwidth: 300 W RMS
• Input sensitivity - 8Ω: 1.6 Volts
• Frequency response: +0, -.5dB, 5 Hz to 20kHz
• Signal-to-noise ratio: > 120 dB
• Total harmonic distortion + noise (20 Hz - 20kHz): <0.03%
• Intermodulation distortion: <0.03%
• Recommended load impedance: 8Ω nominal, stable at 4Ω
• Damping factor: >400 from 10 Hz to 400Hz
• Crosstalk: >- 100 dB from 20 Hz to 20kHz
• Voltage gain
  • (RCA inputs): 28.5 dB ±0.5dB
  • (XLR inputs): 27.5 dB ±0.5dB
• Slew rate: > 50V / μS
• Input impedance: 28 kΩ Nominal
• Output DC offset: <±15mV

Connectivity

• 7x balanced XLR audio inputs
• 7x unbalanced RCA audio inputs
• 1x Pair of speaker outputs (for each channel)
• 1x Trigger connector

General

• Power supply: 117V AC or 230V; 50/60 Hz
• Power consumption (standby): ≤1W (120 VAC), ≤0.5W (240 VAC)
• Chassis dimensions (W x H x D) 432 x 196 X 448 mm
• Weight: 43.3 kg