MODEL P150
Forget everything you’ve experienced about tube amplifiers until now. A perfect harmony of design and sound.
The FJORD AUDIO P150 is a high-end monoblock power amplifier engineered to push the full potential of tube amplification to its limits. By combining the beauty of traditional tube sound with modern circuit design, it delivers overwhelming transparency and dynamic performance.
KEY FEATURES
ENGINEERED TO PERFECTION
Pure Class A Amplification
Zero Feedback Circuit Technology
DFD Circuit Technology (Direct Full Difference)
High-Performance Power Design
Premium Tube Configuration
Fast Low-Frequency Response and Dynamic, Musical Sound
Robust Internal Structure and Protection Circuits
Refined and Luxurious High-End Design
TECHNOLOGY
Pure Class A Amplification
The P150 adopts a fully Pure Class A amplification design, minimizing distortion in the audio signal while delivering a natural flow of sound. Since Class A amplification operates within a constant operating range, it can stably amplify even the smallest signal variations. The result is exceptional tonal density and a natural harmonic structure. This design faithfully conveys the subtle nuances and textures of music, enabling organic and natural musical expression.
Zero Feedback Circuit Technology
Although difficult to implement in high-output tube amplifiers due to issues such as SNR, FJORD AUDIO has achieved a perfect zero-feedback circuit. Feedback can interfere with pure sound. By applying its proprietary zero-feedback design, the P150 achieves a level of transparency and natural high-frequency reproduction that has rarely been experienced in conventional tube amplifiers.
DFD Circuit Technology (Direct Full Difference)
The P150 features FJORD AUDIO’s proprietary DFD (Direct Full Difference) circuit. This design is based on a fully direct-coupled balanced structure centered around vacuum tubes, simplifying the signal path and minimizing unnecessary circuit stages. This approach reduces signal loss while ensuring high transparency and fast response, resulting in more vivid and lifelike music reproduction.
High-Performance Power Design
To maintain the performance of Class A amplification, the P150 is built with a generously designed power supply. A large shielded toroidal transformer and a stable power delivery structure ensure that the amplifier always operates under optimal conditions. This robust power design provides high dynamics and stable driving capability, fully unlocking the potential of demanding high-end speakers.

Premium Tube Configuration
The P150 uses a modern, high-performance tube configuration for powerful output and stable operation. It employs four KT150 output tubes and two 12AU7 driver tubes for precise signal amplification. The KT150 output tube is a modern, high-performance tube with excellent power handling and durability, offering a wide dynamic range and stable drive capability. Even in a Class A environment, it delivers expansive scale and rich energy, enhancing spatial presentation and musical expression.
Fast Low-Frequency Response and Dynamic, Musical Sound
The P150 offers the natural harmonics characteristic of tube amplifiers, along with rich energy and deep soundstage expression. It accurately reproduces the texture and detail of the original source, while improving the low-frequency response speed often criticized in traditional tube power amplifiers. As a result, it delivers a wide dynamic range and scale, enabling an immersive listening experience.

SPECIFICATIONS
TECHNICAL DATA
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