PrimaLuna
EVO 400 Power Amplifier
Best tube amplifier for audiophiles seeking natural sound and easy maintenance.
Meet the PrimaLuna Evo 400 Power Amplifier, a versatile, high-performance audio component designed to elevate your listening experience. This amplifier offers the flexibility of operating in either stereo or monoblock modes, allowing you to tailor your setup to specific needs. It boasts custom super-wide-bandwidth output transformers, ensuring exceptional sound clarity and detail. With its innovative Adaptive AutoBias feature, tube maintenance is simplified, and performance is optimized. The meticulous point-to-point wiring, crafted with Swiss-made wire, speaks volumes about its superior build quality and dedication to pristine audio reproduction. The Evo 400 delivers 70 watts per channel of natural tube power, making it an excellent choice for any serious audio system.
$5995.00
Owner Satisfaction
4.6
/ 5
Category Rank
227
/ 565
#227 in Microphone Preamps
Price vs Category Average
+269%
Above average
Power Stereo Ultra-linear
70234
/ watts x (EL)
Who it's for
- Audiophiles seeking stress-free tube maintenance and easy customization
- Listeners wanting flexible sound profiles for diverse music collections
- Purists prioritizing long-term reliability and premium internal components
Who should skip it
- Casual listeners working within a modest audio budget
- Users with limited rack space or poor ventilation setups
- Budget-conscious owners wary of recurring maintenance expenses
Performance breakdown
Tube Maintenance
Adaptive AutoBias technology removes the headache of manual tube biasing.
Build Integrity
Point-to-point wiring and Swiss-made components ensure exceptional long-term reliability.
Sonic Versatility
Switchable stereo or monoblock modes adapt perfectly to evolving system needs.
Power Delivery
Delivers rich, natural tube warmth with plenty of headroom for dynamics.
Connectivity Options
Balanced XLR and RCA inputs provide flexible integration for high-end sources.
Signal Clarity
Custom wide-bandwidth transformers maintain detail across the entire frequency spectrum.
Key Specs
Power Stereo Ultra-linear
70 watts x 2 (EL34)
Power Mono Ultra-linear
140 watts (EL34)
Frequency Response
9Hz-60kHz +/- 1dB
Total Harmonic Distortion
< 2% @ Rated Power
Signal to Noise Ratio
95 dB
Input Impedance
100kΩ
Dimensions
15.2" W x 8" H x 15.9" D
Weight
68.2 lbs
Features
- Flexible stereo or monoblock operation
- Adaptive AutoBias for optimal tube performance
- Premium point-to-point wiring with Swiss-made wire
- Custom super-wide-bandwidth output transformers
- Bad tube indicator for easy troubleshooting
- Versatile connectivity with RCA and XLR inputs
- Robust build with custom toroidal power transformers
- Delivers natural tube sound quality
What customers say
Owners overwhelmingly praise the PrimaLuna EVO 400 for its exceptional sound quality, describing it as rich, detailed, and incredibly musical, creating a vast, three-dimensional soundstage. The build quality is also highly regarded, reflecting a truly high-end product. A key satisfaction point is the Adaptive AutoBias circuit, which simplifies tube management and extends tube life, making the tube experience accessible. Despite being a significant investment, customers feel the performance rivals much more expensive amplifiers, offering excellent value. The profound musical enjoyment consistently overshadows minor characteristics like weight or heat output, cementing the EVO 400 as a transformative component for serious audiophiles.
Know before you buy
Yes, the EVO 400 is designed for flexibility and can be switched between stereo and monoblock modes. When configured as a monoblock, it provides 140 watts of power, which is ideal for driving more demanding speakers.
Adaptive AutoBias continuously monitors and adjusts the bias of your tubes in real-time. This eliminates the need for manual adjustments, ensures the tubes are always operating at peak performance, and extends their lifespan.
Each tube socket has an LED indicator that lights up if a tube fails. This takes the guesswork out of troubleshooting, allowing you to quickly identify and replace the specific tube that needs attention.
Yes, the EVO 400 features both RCA and XLR inputs. This allows you to integrate it into a variety of high-end audio systems, whether you prefer single-ended or balanced signal paths.
The EVO 400 is engineered to deliver a natural, detailed, and warm tube sound. Thanks to its custom wide-bandwidth output transformers and point-to-point wiring, it maintains high clarity and musicality across a broad frequency range.
Yes, the unit weighs 68.2 pounds and features a robust build with heavy-duty transformers. You should ensure your audio rack or shelf is rated to support this weight and has adequate ventilation for the tubes.
Still have a question?
Ask Hayley anything about this product before you decide.