ENGINEERING PHILOSOPHY
The engineering philosophy behind the Fjord Sound.
DFD TECHNOLOGY
FJORD AUDIO P150 features a Direct Full Difference (DFD) circuit, a fully direct-coupled balanced structure that simplifies the signal path, minimizes unnecessary stages, reduces signal loss, and ensures high transparency with fast response.
PURE CLASS A
Pure Class A amplification design, used in both P150 and C100, minimizes distortion and stably amplifies subtle signal variations, delivering natural flow, tonal density, and faithful musical expression.
ZERO FEEDBACK
Proprietary zero-feedback circuits in P150 and C100 retain the natural texture of the signal, achieving exceptional transparency, high-frequency fidelity, and accurate musical reproduction.
POWER SUPPLY
THE IRON HEART
Robust power supply designs: P150 uses a large toroidal transformer and 80,000μF capacitance; C100 and A100 adopt separate power supplies for left/right channels or main unit and supply. These architectures ensure stable Class A operation, high dynamics, low noise, and consistent performance for all system types.
800VA
TRANSFORMER RATING
80,000μF
TOTAL CAPACITANCE
BUILD QUALITY
01
Three-Layer Architecture
Internal Structure
P150 features a three-layer internal structure separating transformer, power supply, and main circuitry for optimal stability and low interference.
02
UTS Mechanism
C100/A100
Proprietary Upper Tube Set (UTS) design in C100 and A100 minimizes tube microphonic effects and external vibration interference, improving SNR and signal fidelity.
03
Auto-Bias System
P150
Automatic bias monitoring maintains optimal tube performance, enhancing stability and reliability during operation.
COMPONENTS
PRECISION PARTS
FJORD CUSTOM TUBES
P150: KT150 ×4 output tubes and 12AU7 ×2 driver tubes ensure stable operation, wide dynamic range, and powerful output.
C100/A100: Vacuum tubes arranged in UTS design for low noise and high channel separation.
STEPPED ATTENUATOR
64-step precision attenuators for volume (C100) or gain (A100) maintain channel balance, preserve detail, and minimize signal loss.
20+
YEARS K-AUDIO
100%
TESTED
