PrimaLuna EVO 400 Tube Power Amplifier

The PrimaLuna EVO 400 Power Amplifier represents the pinnacle of PrimaLuna's acclaimed EVO series, offering exceptional performance, flexibility and build quality for discerning audiophiles seeking reference-level valve amplification.

Exceptional Craftsmanship

Each PrimaLuna EVO 400 features meticulous handmade construction with a heavy-gauge, fully vented steel chassis finished with five coats, each hand-rubbed and polished. Weighing a substantial 31kg, this flagship power amplifier exemplifies PrimaLuna's commitment to uncompromising build quality.

Inside, you'll discover point-to-point wiring using only the finest Swiss silver wires—a level of detail typically reserved for far more expensive valve equipment. This attention to detail extends throughout the entire signal path, ensuring optimal signal integrity and sonic performance.

Premium Components

The EVO 400 incorporates custom-designed toroidal and EI-frame transformers, manufactured to exacting specifications from one of America's most prestigious transformer designers. Each transformer is fully encapsulated to ensure minimal hum and optimal isolation, delivering the renowned PrimaLuna sound signature that combines valve midrange magic with sparkling highs and deep, solid bass.

Additional premium components include:

• Nichicon and DuRoch polypropylene capacitors
• Superfast Philips rectifier diodes
• Ceramic tube sockets
• Gold-plated heavy-duty WBT-style speaker terminals with solid shaft construction
• Gold-plated panel-mounted RCA and XLR input/output jacks

Exceptional Performance and Flexibility

The EVO 400 delivers remarkable power output and versatility:

• Ultra-Linear Mode: Up to 89 watts per channel in stereo (188 watts mono) when equipped with KT150 valves
• Triode Mode: Up to 51 watts per channel in stereo (109 watts mono) for a more refined, intimate presentation
• Adaptive Auto Bias™ circuit which monitors and smoothly adjusts tube bias continuously
• Mono/stereo switch for flexible system configuration
• Support for multiple valve types (EL34, KT88, KT120, KT150) with high/low bias switch

Advanced Protection Features

• PTP™ (Power Transformer Protection) circuit prevents damage from overheating
• SoftStart smart circuit design extends component life and reduces thermal shock
• Improved output-stage protection circuitry with relay to protect transformers and components

Technical Specifications

• Model: EVO 400-4 for EL34/KT88/KT120/KT150
• Power Output (Ultra-Linear): 70/72/85/89 Watts per channel stereo; 140/145/175/188 Watts mono
• Power Output (Triode): 38/43/45/51 Watts per channel stereo; 82/88/94/109 Watts mono
• Frequency Response: 9 Hz – 60 kHz +/- 1 dB, 8 Hz – 70 kHz +/- 3 dB
• THD with AABB: < 0.1% @ 1W; less than 2% at rated power
• S/N Ratio: 95 dB – 105 dB A Weighted
• Dimensions: 405 x 385 x 205 mm (L x W x H)
• Weight: 31 kg
• Inputs: 1 pair Stereo RCA & XLR, 1 piece Mono RCA & XLR
• Outputs: 4, 8 & 16/2, 4 & 8 Ohm Speaker Taps
• Tube Complement: 8 x EL34, 6 x 12AU7
• Damping Coefficient: 7 KD (1 kHz)

Experience the remarkable craftsmanship, flexibility, and musicality that have earned the PrimaLuna EVO 400 its reputation as one of the finest valve power amplifiers available. Visit our demonstration rooms to discover why discerning audiophiles choose PrimaLuna for their high-end valve amplification needs.