Vincent PHO-500
Vincent PHO-500 phono preamplifier with external power supply and individual adjustments via DIP switches, designed for clean, quiet playback.
Description
The Vincent PHO-500 is a phono preamplifier dedicated to amplifying the signal from a turntable cartridge, before it passes to an amplifier or hi-fi system. Its purpose is simple to state but demanding to achieve: to reproduce the phono signal with as little noise as possible and stable playback.
To achieve this, Vincent opted for a complex power supply, housed in an external case separate from the body of the preamplifier. This choice makes it possible to isolate the amplification circuits from the electrical interference that an internal power supply unit can generate, a sensitive point on this type of device where the signal to be processed is particularly weak. The PHO-500 also relies on carefully selected components in the amplification stage itself.
The unit also features DIP switches, which allow individual adjustments to be made directly on the preamplifier. This function provides useful scope for adjustment to adapt the unit to the characteristics of the cartridge used.
This phono preamplifier is aimed at vinyl enthusiasts wishing to improve the playback quality of their setup, particularly those who already own a cartridge whose parameters deserve fine-tuning using the DIP switches. It will suit both an established hi-fi system and a system in the process of evolving towards greater phono precision.
What to check before buying used
The DIP switches deserve checking on receipt: worn or misaligned contacts can throw off the impedance or gain set for the cartridge. The external power supply unit should be tested with its original cable and connector, as a hasty replacement could introduce hum. Listen carefully to the level of background noise and hiss, which reveals the condition of the capacitors and the amplification stage.
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