Quadraspire Q4 Evo Wood Series SR-009S and SR-X9000 owners who

SR-009S and SR-X9000 owners who want STAX's best solid-state driver for reference-level electrostatic listening

A standout value in Audio-Technica's Air Dynamic series

Combines the TDA1541's legendary analogue presentation with the additional transparency and three-dimensionality of transformer-coupled output

or budget streamer

Quadraspire Q4 Evo Wood Series SR-009S and SR-X9000 owners whoThe Quadraspire Q4 Evo is a modular hi fi rack system engineered to reduce resonance and lower the noise floor of any audio system built from solid bamboo ply shelves with solid (not tubular) aluminum columns and feet, designed without parallel lines, and configurable to any shelf height from 100mm to 326mm. Every shelf holds up to 80kg. Design Philosophy What you place your equipment on affects how it sounds. The Q4 Evo addresses this through three