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High Fidelity Audio

MC1 Moving Coil Step-Up Transformer

Rothwell · MC1

MC1 Moving Coil Step-Up Transformer

Passive step-up transformer for pure moving coil signal amplification.

The MC1 brings an uncompromising level of transparency to the vinyl playback chain by utilising the inherent advantages of high-quality transformer coupling. It functions as a bridge between the delicate output of a moving coil cartridge and the standard input of a moving magnet phono-stage, ensuring the signal remains untouched by active electronics. As the core of the MC1 line, this transformer is engineered for simplicity and sonic purity. It eliminates the need for power supplies and active gain circuits, which can often introduce their own noise or harmonic distortion, thereby preserving the original micro-dynamics of the recording. The resulting performance is characterised by a natural, organic presentation that avoids the clinical edge sometimes associated with active head amplifiers. It offers a calm, stable soundstage with excellent separation, providing an ideal solution for listeners who value the raw, unadulterated output of their finest cartridges.

Key Features

01

Passive amplification

Provides gain without the noise, power requirements, or distortion associated with active transistor circuits.

02

Premium magnetic cores

High-quality transformer cores ensure excellent bandwidth and linearity across the audible frequency range.

03

Robust screening

The steel chassis provides effective shielding against external electromagnetic interference and hum.

04

Minimalist signal path

Engineered with high-quality internal wiring and connectors to ensure maximum signal integrity from input to output.

Chapter 01

Design & Philosophy

The MC1 is built on the belief that for moving coil signals, passive amplification is the most elegant solution. By avoiding active components, the device maintains the phase accuracy and temporal coherence of the music, acting as a transparent window rather than an additive stage.

Chapter 02

Build & Materials

Every MC1 is housed in a heavy-duty steel enclosure designed to mitigate mechanical vibrations and electrical noise. The internals are meticulously point-to-point wired using high-grade components to prevent signal degradation, reflecting a commitment to long-term reliability and performance.

Chapter 03

Sonic Signature

Listeners can expect a presentation marked by incredible quietness and spatial depth. The transformer naturally attenuates high-frequency noise while providing the necessary current to drive phono-stage inputs, resulting in a rich, textured, and deeply musical sound that honours the source.

Specifications

Turns ratio1:12.9
Voltage gain22dB (x12.9)
Input impedance100 ohms
Optimum load impedance47k + 150pF
Bandwidth5Hz - 36kHz (+0/-3dB)
cartridge compatibility (o/p)0.3mV - 0.7mV
cartridge compatibility (imp.)internal impedance <20 ohms
Dimensions60 x 155 x 92 mm
Weight580 g