The SR-009S electrostatic headphones and SRM-700S headphone driver from Stax are a premium duo, but certainly on the pricier side of things.

Today, fewer than 20 people continue to create products like the SR-L700, the latest high-end Lambda earspeaker, and the SRM-T8000, the long-awaited amplifier designed to fully exploit the SR-009.

At $2,600, the STAX SR-L700 MK2 combo with SRM-D10 MK2 energizer delivers a magical listening experience.

Earbuds & In-Ear Headphones STAX SR-003 MK2 Electrostatic Earspeakers with SRM-D10 II Energizer: Review STAX has unleashed a $1,295 earspeaker system that’s unmatched for the price, but that doesn’t ...

Talking of valves, the Stax driver we were loaned, the SRM-T8000 (£4395, $6090, AU$8000), employs two small-signal 6922 valves in the input stage (hidden away under the substantial casing).