Moving Coil Transformers with mu-metal shielding
Separate high-voltage and heater transformers
and power supplies
Signal path Component Matching for pin-point
sound stage image
High Purity solid copper wire for point-to-point
wiring of valve stages
The Hansen Phono Stage is designed for the LP lover and audio purist with the shortest signal path between input and output. Purity, dynamics and excellent bass describe the sound of this valve phono stage. The listening pleasure that this valve phono stage produces is in the fine details and "air" of the sound recording with clarity and ease re-creating the three dimensional sound stage of the original. Mid-band reproduction is accurate and bass is deep with good bottom end information. Available upgrades take this phono stage to a level of sound well beyond the monetary value. Putting this Valve Phono Stage into any system is an upgrade on its own.
The Hansen Phono Stage incorporates three "6SN7 type" valves. It has an input impedance of 47K Ohm for the moving magnet input and for the moving coil input an input step-up transformer is used. The valves are hard wired with point to point solid core high quality copper wire with a poly-ethylene sheath. The output wire on each channel is tweaked with a piece of high purity solid silver wire. There are separate high voltage and low voltage transformers, both suspended on rubber mountings for damping purposes, eliminating transformer vibration reaching the valves. The valves are mounted in the chassis on a wood cross member of an "H" frame for rigidity and at 90 degrees to the horizontal to reduce susceptibility to vibration which the valve picks up as micro-phonics. Wood is used as it has a better sonic signature that metal. The low and high voltage power supplies are on separate printed circuit boards. Both power supplies have high speed diodes and good quality capacitors with values far above the standard requirements so as to improve dynamics in the sound, smoothing of the voltage and noise reduction. Bypass capacitors are inserted in all critical positions on both power supplies and in the audio section. Shields are inserted between the power supply sections and the audio area to reduce noise transfer. All resistors in the audio stage are matched. This HANSEN Valve Phono Stage is designed for operation with 230VAC mains input.