Red4 is a high output moving iron cartridge designed for compatibility with a wide range of phono stages.

Its presentation is balanced and controlled, with clear detail and a smooth, natural top end. The midrange carries presence and body, while low frequencies remain defined and composed.

Recordings are presented with stability and coherence, maintaining separation and imaging while allowing the character of the music to come through naturally.

Red4 features a bonded elliptical diamond mounted to an aluminum cantilever.

The elliptical profile provides effective groove contact and reliable tracking, while the aluminum cantilever contributes to a stable and controlled presentation. This combination delivers clarity and consistency across a wide range of recordings.

The stylus assembly is user-replaceable, allowing for easy maintenance and long-term ownership. All Prestige Series styli are interchangeable, providing flexibility across models while maintaining consistent performance.

All Grado cartridges utilize a moving iron design built on Joseph Grado’s patented flux-bridger principle.

This approach allows the cartridge to generate a precise signal with extremely low moving mass, while keeping the coil structure fixed. The result is a presentation that combines speed, control, and harmonic integrity without the fragility often associated with traditional moving coil systems.

The design also ensures long-term consistency, maintaining performance over time without degradation of the internal signal path.

The internal signal path is built using ultra-high purity 5N OCC copper, selected for its conductivity and consistency.

Each cartridge undergoes cryogenic treatment and internal damping to reduce unwanted resonance and preserve signal integrity. The result is a presentation that remains coherent, balanced, and dynamically responsive.