Six Acoustic X400 Dual Mono GaNFET Stereo Integrated Amplifier

Six Acoustic X400 Dual Mono GaNFET Stereo Integrated Amplifier

The Six Acoustic X400 is a dual mono stereo integrated amplifier built around modern GaNFET Class D topology for high efficiency and high-fidelity performance. Designed and manufactured in Canada, the X400 delivers tight bass control, excellent speaker grip, and a clean, extended frequency response—while keeping the system simple with onboard source selection, tone controls, and HD Bluetooth input.

Made to order: Please allow 3–4 weeks for delivery.

Why the X400 Stands Apart

• True dual mono architecture with two independent channels and separate power supplies for improved channel isolation.
• GaNFET switching elements designed to achieve performance comparable to high-end Class A/B, with substantially higher efficiency.
• Front panel tone controls and source selection for real-world flexibility.
• Tone control bypass for purist listening.
• HD Bluetooth input for convenient high-quality wireless playback.
• Low quiescent power (<3W) and high efficiency (>90% at rated power).

Power & Performance

The X400 is engineered to drive real loudspeakers with confidence, offering strong continuous output and high damping factor for control and dynamics.

• Continuous output: 2 × 125W @ 8Ω; 2 × 250W @ 4Ω
• Signal-to-noise ratio: >100 dB
• THD (50W into 8Ω): <0.01%
• Damping factor: >800 @ 1 kHz

Connectivity & System Integration

• Inputs: 2× RCA pairs, 1× XLR (balanced), Bluetooth
• Line output: 1× RCA pair
• Speaker outputs: 3-way binding posts (2 per channel)
• Front panel: source selection, tone controls, tone bypass

Dimensions & Build

• Size (W×D×H): 17" × 11.7" × 3"
• Weight: 9.5 lbs
• Designed & manufactured in Canada

System Pairing & Recommendations

The X400 is ideal for modern two-channel systems where you want high power, low noise, and excellent control. For best results, pair it with resolving speakers and a clean front end (streamer or DAC). If you’d like help matching the X400 to your speakers and room size, we’re happy to assist.

Explore more from Six Acoustic here: Six Acoustic collection.

Made-to-Order Delivery

Important: This product is made to order. Please allow 3–4 weeks for delivery.

Buy with Confidence from HiFi Boutique

• Authorized Six Acoustic dealer
• Secure packaging and insured shipping
• Expert guidance on system matching and setup
• Support before and after your purchase

Frequently Asked Questions

Is the Six Acoustic X400 made to order?

Yes. Please allow 3–4 weeks for delivery.

Does the X400 have balanced (XLR) input?

Yes. The X400 includes one pair of XLR (balanced) inputs, plus RCA and Bluetooth.

How much power does the X400 deliver?

Continuous output is 2 × 125W @ 8Ω and 2 × 250W @ 4Ω.

Can I bypass tone controls?

Yes. The X400 includes a front panel tone control bypass.