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The Lyngdorf MXA-8400 is a state-of-the-art 8-channel power amplifier designed and built in Denmark to set new standards in multichannel high-fidelity and home cinema performance. With 8 x 400 watts of ultra-linear power—and up to 4 x 800 watts in bridged mode—the MXA-8400 is engineered to effortlessly drive the world’s most demanding speaker systems with unprecedented precision, control, and efficiency.
Powered by Purifi EIGENTAKT: Ultra-Low Distortion, Absolute Neutrality
At the heart of the MXA-8400 lies the groundbreaking Purifi EIGENTAKT amplification technology. Developed to eliminate the shortcomings traditionally associated with Class D amplifiers, EIGENTAKT features a patented Error Correction (EEC) circuit that maintains ultra-high loop gain (>75 dB) across the output stage.
This results in:
Vanishingly low Total Harmonic and Intermodulation Distortion (THD/IMD)
Consistent performance across all loads and frequencies
Crystal-clear imaging and stable stereo presentation
Uncolored, noise-free, and distortion-free sound even at high volumes
This performance rivals and often surpasses the finest analog Class A/B designs, while offering the size, efficiency, and thermal management advantages of Class D.
PowerPerfect™ Power Supply: Clean, Fanless, and Uncompromising
The proprietary PowerPerfect power supply has been custom-designed to manage the massive power demands of eight Purifi modules. This next-generation supply dynamically balances energy between channels and features:
Extremely high efficiency
Passive line filtering to reduce interference to and from the mains
Complete electrical decoupling from the power grid
Fanless operation, enabled by intelligent thermal design and heat dissipation through the chassis
This ensures noise-free operation, improved overall system performance, and long-term reliability.
Consistent Output, Even Under Extreme Loads
Unlike conventional amplifiers, the MXA-8400 maintains a flat, linear response without compression, even when driven at or beyond its rated output—making it a perfect match for reference-level loudspeakers, immersive multichannel systems, or high-performance custom installations.
Each pair of channels can be bridged to deliver 800 W into 8 ohms, providing incredible flexibility for bi-amping, subwoofer drive, or use in power-hungry main channels.
Precision-Built in Denmark: Tested to Perfection
Every MXA-8400 is:
Hand-assembled in Denmark
Individually tested under full load for 24 hours
Measured and verified to exceed performance specs
This obsessive attention to detail guarantees thermal stability, operational safety, and long-term reliability, whether in private listening rooms or professional AV installations.
Power Output:
8 × 400 W @ 4/8 ohms
4 × 800 W @ 8 ohms (bridged mode)
Amplification:
Purifi EIGENTAKT with EEC error correction
Negligible THD/IMD
High damping factor
Immune to reactive speaker loads
Power Supply:
PowerPerfect, high-efficiency fanless design
Channel-to-channel energy balancing
Full mains decoupling with passive filtering
Design & Protection:
4-layer PCB layout
Ultra-low noise input stages
Protection against overload, thermal faults, and unusual conditions
Configurable bridge mode per channel pair
Build:
Precision assembly in Denmark
24-hour burn-in test per unit
Redefining Multichannel Power
With the MXA-8400, Lyngdorf Audio introduces a new reference in amplifier design—combining clinical precision, effortless power, and unmatched efficiency in a compact and beautifully engineered chassis. Whether in a reference home theater, high-end audio system, or integrator-grade multichannel install, the MXA-8400 delivers performance without compromise.
8-channel AV power amplifier
Power rating: 8 x 400 W @4Ω (2 CHANNEL mode), 8 x 200 W @8Ω (2 CHANNEL mode), 4 x 800 W @8Ω (BRIDGE mode) Power rating
THD rating: 8 x 340 W @ 4 Ω (2 CHANNEL mode), 8 x 200 W @ 8 Ω (2 CHANNEL mode)
Idle power consumption: 29 W
Standby power consumption: <0.5 W
Time to standby: 15 minutes (no input signal, in LOW POWER mode)
Frequency response: ±0.1dB (ref. 20Hz-20kHz)
THD: 0.001% @200 W, 8Ω / 340 W, 4Ω, 20Hz-20kHz, 0.0006% @10 W, 4Ω, 20Hz- 20 kHz, LOW sensitivity mode, 0.0007 % @10 W, 4 Ω, 20 Hz-20 kHz, HIGH sensitivity mode
Maximum output current per channel: 25 A
Maximum output voltage per channel: 58 V peak (2 CHANNEL mode), 116 V peak (BRIDGE mode)
Gain: HIGH sensitivity mode: 26.1 dB (2 CHANNEL mode), 31.7 dB (BRIDGE mode), LOW sensitivity mode: 16.6 dB (2 CHANNEL mode) 22.2 dB (BRIDGE mode)
Signal-to-Noise Ratio: 128 dB (A-weighted ref. power rating, LOW sensitivity mode)
Damping factor: >1200 (8 Ω, 20 Hz-1 kHz)
Input sensitivity: HIGH sensitivity mode : 2 V, LOW sensitivity mode : 6 V
Input impedance: 10 kΩ
Audio inputs: 8 x XLR analogue inputs
Audio Outputs: 8 x Neutrik SpeakON
Dimensions (W x H x D): 45 x 14.5 x 34.9 cm (W x 14.5 x 34.9 cm)
Weight: 10.3 kg / 22 lbs
