Quad ERA-1 Headphones Category/Home Audio/HiFi\/Stereo Accessories/Isolation Products It also uses what's called

It also uses what's called an aperiodic loading system to give it a boost in the low frequencies

through painstaking design

let's squelch the myth that valve amps don't have strong or controlled bass

I can still think of a number of decent monitors for that kind of price

Quad ERA-1 Headphones Category/Home Audio/HiFi\/Stereo Accessories/Isolation Products It also uses what's calledAbout The Quad ERA 1 Headphones The Quad ERA 1 are the first headphones from the revered British brand and they are so good they make you wonder why they haven't done this before. A debut to be proud of. Quad has been responsible for many landmark hi fi products throughout its history, none more famous than successive generations of the ESL the world's most revered electrostatic panel loudspeaker, a technology invented by Quad's founder, Peter Walker.