Интегральные усилители — Gato Audio DIA-400S NPM

The DIA-400S NPM is a Class D integrated amplifier with built-in DAC and network streaming from Gato Audio, a Danish manufacturer, built as a thoroughly updated version of the standard DIA-400 with performance specifically pushed closer to the brand's own AMP-150 integrated amplifier. Gato Audio changed and improved the electrical circuits and layout in more than twenty distinct ways over the outgoing model, and the S in the name stands for Super - the bestselling combination of amplifier, DAC and NPM streaming module in one compact, beautiful cabinet.

Key specs that matter

The Class D output stage delivers 2 x 400W into 8 ohms, doubling to 2 x 800W into 4 ohms, built around proven International Rectifier technology optimised with a precision high-frequency oscillator and PWM modulator. A pair of precision switching MOS-FET transistors with super-low on-resistance ensures high-frequency switching happens with as little loss as possible, and output filters use quality PP capacitors and low-DCR coils to convert the high-power PWM signal back into detailed, smooth analogue music. The built-in 24-bit/192kHz D/A converter with upsampling handles coaxial and asynchronous USB inputs up to 24-bit/192kHz and optical up to 24-bit/96kHz, alongside an aptX HD Bluetooth 4.2 receiver supporting 24-bit/48kHz wireless audio, letting virtually any smartphone or tablet stream in better-than-CD quality. The built-in NPM module transforms the DIA-400S into a genuine high-end network streamer, connecting via Ethernet or Wi-Fi and controlled through a companion app or as a Roon endpoint, with direct support for Tidal, Qobuz, Deezer, MQA (via Roon), AAC, AIFF, MP3, FLAC, WAV, WMA, Apple Lossless, OGG and Monkey's Audio formats, plus gapless playback. High-quality analogue input is via RCA or true balanced XLR connectors, with both balanced and unbalanced line outputs plus a trigger signal for external power amplifiers, and a configurable home theatre input that turns the amplifier into a fixed-level power amp for surround-sound integration without compromising two-channel sonic performance. Standard top-cover finishes include high-gloss black, white and real walnut veneer to match Gato Audio's own loudspeakers, with bespoke custom colours available on request to match any decor, furniture or vehicle.

Sound and use context

Expect absolutely world-class sonic performance that dares direct comparison with exotic Class D amplifiers costing two to four times as much - Gato Audio specifically states the combination of its best available Class D amplification technology with delicately engineered analogue stages produces reference-tier results, recognisable by the distinctive clock-like ring surrounding the solid volume knob.

Pairing

The configurable home theatre input lets this amplifier integrate into a surround-sound system as a dedicated fixed-level power amp without sacrificing its two-channel performance, and the trigger output for external power amplifiers means the DIA-400S NPM can anchor a system that later expands with additional dedicated amplification.

Alternatives

Gato Audio's own AMP-150 integrated amplifier sits as the reference the DIA-400S was specifically engineered to approach, while the brand's separate SDA-1 streamer offers a standalone alternative for buyers wanting network streaming decoupled from amplification, worth comparing directly if a different system architecture better suits a specific setup.