Steve Smith Audio Products
Twin Channel Valve Microphone Pre-amplifier:
This is an all valve (tube) circuit pre-amplifier with balanced line microphone inputs. Featuring phantom power at 48 volts and phase reversal switches. Each section comprises of an ECC82/12AU7 dual triode valve which amplifies the microphone signal via an input transformer.
An instrument input is also supplied which bypasses the transformer and gives a direct input for guitars or for a line level input.
As this pre-amplifier is designed for the home studio, it has -10dBV unbalanced outputs rather than balanced +4dBu outputs. It can however drive balanced line inputs if 'ground compensated' wiring is employed.
Internal View of a unit under construction:
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