ATC SIA2 100
ATC SIA2 100 - Image 2

ATC SIA2 100

€3.449,00

Review – Audiograde
Review – Hi-Fi+

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The ATC SIA2-100 is a compact high-performance integrated amplifier with a built-in DAC, designed to deliver strong power, detail, and flexibility in a space-saving chassis. Despite its compact 2/3-width size, it provides exceptional resolution and enough power to drive ATC small and mid-size passive loudspeakers, as well as many speakers from other brands.

In addition, the SIA2-100 combines analogue and digital connectivity in one unit. Therefore, it works as a complete hub for modern hi-fi systems while keeping setup simple and compact.

Integrated amplifier and DAC design

The SIA2-100 combines ATC’s discrete analogue amplifier design with a premium AKM 32-bit DAC. In addition, multiple local power supply regulators help maintain clean signal performance. As a result, it delivers highly detailed sound with distortion below 0.001% across analogue and digital inputs.

100W MOSFET amplification

The amplifier uses ATC’s discrete MOSFET output stage and delivers 100W per channel. Therefore, it offers strong control, fast dynamics, and stable performance across a wide range of loudspeakers.

Digital and analogue connectivity

The SIA2-100 includes 2 analogue line inputs and 3 digital inputs: USB, coaxial, and TOSLINK. Furthermore, the USB input supports up to 384kHz PCM and native DSD256 (via PC). As a result, it works well with both traditional and high-resolution digital sources.

Headphone amplifier and auxiliary input

A built-in Class A biased headphone amplifier supports headphones from 32 to 600 ohms. In addition, a 3.5mm auxiliary input allows easy connection of portable audio devices.

Compact design and system flexibility

The compact chassis takes up very little space and integrates easily with other equipment. Therefore, the SIA2-100 suits smaller listening spaces without compromising performance.

Main Features

  • Compact integrated amplifier with built-in DAC
  • 100W per channel ATC MOSFET output stage
  • Premium AKM 32-bit DAC
  • USB input up to 384kHz PCM and DSD256 (PC)
  • 2 analogue line inputs
  • 3 digital inputs: USB, Coaxial, and TOSLINK
  • Built-in Class A headphone amplifier
  • 3.5mm auxiliary input for portable devices
  • Distortion below 0.001%
  • Handmade in England
  • 6-year manufacturer warranty

Specifications

Amplifier

Max Continuous Power Output 100 W (0.1% THD, 8 Ω, both channels driven)
Frequency Response <2 Hz – >250 kHz (−3 dB)
Distortion <0.0015% / 96 dB (1 kHz, 8 Ω, 1 dB below full power)
Signal-to-Noise Ratio >112 dB (IEC ‘A’)
Crosstalk >90 dB (10 Hz – 20 kHz)
Input Sensitivity 500 mV (ref. 100 W output)

Inputs & Outputs

Analogue Pre-Amp Outputs 1 × stereo pair via RCA/Phono
Headphone Output 1 × 6.35 mm jack
Analogue Line Inputs 2 × stereo pairs via RCA/Phono

DAC

Digital Inputs 1 × TOSLINK, 1 × Coaxial, 1 × USB Audio
Distortion <0.001% at all supported sample rates
Supported Formats (TOSLINK) Up to 24-bit / 96 kHz PCM
Supported Formats (Coaxial) Up to 24-bit / 192 kHz PCM
Supported Formats (USB) Up to 32-bit / 384 kHz PCM
Up to DSD256 (Windows/Linux)
Up to DSD128 (Mac)

Physical

Dimensions (H × W × D) 113 × 315 × 342 mm
4.4 × 12.4 × 13.5 in
(including binding posts)
Weight 9 kg / 19.8 lbs