QUAD ESL-X Electrostatic loudspeakers

These are a very old friend born again in this most recent iteration of Peter Walker’s original transducer technology 

https://quad-hifi.co.uk/pages/our-story

The ESL-X concept began in 2019 as part of an intensive review of the QUAD Electrostatic manufacturing facility—a suite dedicated solely to the production of QUAD ESL loudspeakers.

Under the expert leadership of Paul McConville, (a gentleman recognised as the world’s foremost authority in QUAD ESL engineering, with 40 years of experience), every aspect of the original design underwent a comprehensive evaluation and meticulous refinement.

This approach encompassed a thorough analysis of every process, step, technique, material, tool, and jig employed in the construction of a QUAD ESL, with the aim of improving the quality and precision of the electrostatic loudspeaker assembly.

Leveraging techniques such as advanced laser-precision metrology, QUAD undertook an exhaustive review of the foundation of the ESL design. Systematic enhancements were implemented in the processes of spraying, etching, tensioning, and assembly to ensure peak performance. Rigorous upgrades were applied to implement both passive and active components, enhancing the overall system integrity of the then-current ESL2912 and 2812 models.

The team of QUAD engineers considered the results of this lengthy and time-consuming self-appointed audit so significant that they deemed it worthy of a new model in the lineage of the ESL programme.

It is widely accepted that enhancing an ESL is fundamentally an exercise in building upon existing frameworks through incremental improvements rather than pursuing radical innovations. Consequently, QUAD did not require a complete overhaul of established methods.

Nonetheless, these incremental advancements have now culminated in a significant transformation of the 2912 and 2812 models into what is now known as ESL X.