MM Transformer Interface Stage
1:2 Implementation
MANNVS is a broadband transformer-based interface stage designed for MM/MI phono cartridges.
It operates as a coupling element between cartridge and phono stage, providing controlled signal transfer and optimized electrical interaction.
Concept
In MM systems, signal level alone does not define performance.
MANNVS introduces a transformer interface that stabilizes the interaction between cartridge and phono stage, improving signal transfer conditions rather than acting as a pure gain device.
The 1:2 ratio provides moderate voltage increase while maintaining cartridge loading integrity.
Architecture
MANNVS is built as a passive transformer stage:
- broadband transformer coupling,
- fixed 1:2 winding ratio,
- direct integration between cartridge and phono input.
The structure is designed to preserve signal consistency while reducing sensitivity to input conditions of the phono stage.
Specifications:
DC Resistance (primary): 1000 Ohms
DC Resistance (secondary): 2000 Ohms approx
Frequency response: 5Hz to 100kHz (+-0.5dB)
Ratio: 1:2
Voltage gain: 6dB
Weight: 0.8kg
Signal Behaviour
MANNVS provides:
- controlled signal transfer from cartridge to phono stage,
- improved low-level signal visibility,
- reduced system noise sensitivity,
- stable frequency response across the audio range.
The transformer acts as an interface element, shaping how energy
is transferred rather than altering the fundamental character of the cartridge.
System Role
MANNVS is intended for systems where:
- MM cartridge output is insufficient for optimal phono stage operation,
- stable cartridge-to-stage interaction is required,
- improved signal structure and noise performance are desired.
Position in MM Interface Systems
MANNVS represents the transformer-based coupling stage within the MM interface architecture,
focusing on controlled signal transfer and system matching.
