GaN Technology

The SMSL PA400 GaN Power Amplifier ushers in a new era of sound quality with Gallium Nitride (GaN) transistors, the latest in power amplification technology. Engineered with Infineon’s GaN transistors, the PA400 operates at a cutting-edge 1MHz switching frequency, delivering a sound that is both exquisitely detailed and incredibly pure. With PGA2311, the flagship volume control chip from TI, every note is reproduced with uncompromising precision.

Stereo Balanced Input

When paired with a preamp, the SMSL PA400 achieves an incredibly pure and direct sound, rich in detail. Its stereo balanced input provides an optimized, clean signal pathway, ensuring high input impedance and linear response. In this mode, the amplifier works silently in the background, never overshadowing the preamp but amplifying the musical essence with zero distortion or compromise.

XLR Mono Bridge Mode

For demanding systems, the PA400 can be paired in XLR Mono Bridge Mode to significantly boost power output. By combining two units, the amplifier quadruples its power capacity, effortlessly driving even the most power-hungry speakers. This cooperative mode suppresses background noise while enhancing soundstage depth, width, and resolution. Low frequencies extend deeper, midrange vocals are fuller and warmer, and high frequencies become cleaner and more natural. Perfect for both home theaters and high-end Hi-Fi setups.

Aerospace-Grade Aluminum Construction

Crafted from aerospace-grade aluminum alloy, the PA400 is built for durability and optimal heat dissipation. The robust CNC-milled unibody design, paired with passive cooling features, ensures stable operation under high-demand conditions. The 150-grit sandblasted surface not only improves heat resistance but also delivers a sophisticated look and feel with a smooth, refined texture.

Meticulously Crafted Design

Every detail of the SMSL PA400 is a statement of premium craftsmanship. The precision-engineered knobs and the unibody design reflect the commitment to perfection. This amplifier is as much a work of art as it is a piece of advanced technology.

Premium Components for Premium Sound

Inside, the PA400 is powered by high-quality components sourced from the best suppliers worldwide. These premium materials ensure that the amplifier delivers exceptionally low distortion and abundant energy, providing the cleanest, most powerful sound possible. The entire design is focused on delivering unmatched sound fidelity from source to speaker.

Technical Details

Input
Balanced (XLR) / Line In (RCA) / Mono (XLR)
THD+N
0.003%
SNR
115dB
Channel Separation
75dB
Input Sensitivity (Stereo RCA)
0.96Vrms / 22kΩ
Input Sensitivity (XLR)
2.1Vrms / 22kΩ
Output Power
Mono (XLR, 8Ω) 500Wrms ×1 / Stereo (XLR, 4Ω) 250Wrms ×2 / Stereo (XLR, 8Ω) 200Wrms ×2
Standby Power
<0.5W
Power Consumption
40W (Normal Volume)
Dimensions
254 × 47.7 × 242 mm (W × H × D)
Weight
2.58kg (5.69 lbs)
Inside the Box
  • 1 x SMSL PA400
  • User Manual

30-Day Return Policy

You may return any non-customized product that is still factory sealed, within 30 days upon receiving it. For items that are damaged, incorrect, or faulty upon delivery, Linsoul will assess the issue and provide a solution accordingly.

1 Year Warranty

The SMSL PA400 Comes with a 1 year warranty on the AMP & DAC only. Warranty doesn't apply to the included accessories.

Processing Time

This product is in Pre-order period. Pre-orders are provided for items that have not reached us and will take some time to be shipped out.

Pre-order Period: 1 week.

Note:

  • No cancellation of orders once ordered.
  • All orders to be shipped out sequentially.

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