The Lowther Phase Plug Set offers a modular approach to fine-tuning the sonic character of your drive unit. Each plug is hand-turned from acoustically selected materials and designed to interact with the upper frequencies and dispersion patterns of your speaker.

Included in the set:

• Standard Dome – The classic Lowther voice, offering balanced treble and broad dispersion.

• Sound Diffuser – Adds air and texture to high frequencies while subtly expanding the soundstage.

• Phase Equaliser – A precision-shaped plug designed to tame on-axis peaks and improve high-frequency coherence, ideal for highly reflective or horn-loaded environments.

Whether you’re shaping your speaker to suit a particular room, amplifier, or musical style, this set gives you the freedom to tailor your system with artisan precision.