Rothwell · Rothwell Phonos
Simplex MM Phonostage
Pure class A transistor design for authentic vinyl reproduction.
The Simplex MM represents the essence of Rothwell phono design, distilling decades of analogue expertise into a focused, high-fidelity instrument. By stripping away non-essential features, we have created a dedicated moving magnet stage that prioritises the integrity of the cartridge signal above all else.
At its heart lies a sophisticated discrete transistor circuit operating in class A, utilising local rather than global feedback. This design choice ensures wide bandwidth and high linearity, allowing the stage to resolve complex musical passages without the harshness or confusion often found in entry-level components.
Sonically, the Simplex MM is characterised by an open, spacious soundstage and a remarkably low noise floor. It presents music with a natural, unforced detail that allows the listener to engage deeply with the performance. It is a reliable, understated component that brings a professional level of transparency to any high-quality home audio system.
Key Features
01
Discrete class A circuitry
Avoids standard op-amps to preserve signal purity and eliminate crossover distortion.
02
Precision RIAA equalisation
Utilises multiple audiophile-grade polypropylene capacitors to achieve accuracy within 0.5dB.
03
Advanced noise management
Employs star earthing and short, optimised circuit routing to minimise interference and hum.
04
Minimalist signal path
Eliminates global feedback to maintain high linearity and a natural, transparent sound signature.
Chapter 01
Design Philosophy
The Simplex is built on the belief that simplicity in design often leads to superior musicality. By avoiding complex switching and unnecessary features, the circuit remains short and direct, ensuring that the delicate signal from your turntable reaches the amplifier with minimal degradation.
Chapter 02
Engineering Notes
Rather than using a single capacitor for RIAA equalisation, the Simplex uses a parallel array of high-quality components. This not only improves precision but also allows the capacitors to act as mutual bypasses, reducing parasitic effects and enhancing the overall clarity of the reproduction.
Chapter 03
Sonic Signature
Listeners can expect a presentation that is both detailed and emotionally cohesive. The Simplex MM is noted for its ability to reveal individual strands of music during complex passages, while its low-noise floor ensures that even the most subtle recorded nuances remain audible and free from background hiss.