Signet TK33 Electret Stereophones

Signet (Audio-Technica's upscale line) Stereophones from about 1980. These are like the Stax SR-40 Earspeakers and SR-4 Adaptor. I had both, and these are very competitive, with great transparency, speed, and gorgeous rendering of voices and acoustic stringed instruments. Definitely more than a taste of the electrostatic world.
The adaptor connects to a stereo amplifier or receiver, and also outputs the amplified signal to drive loudspeakers, so it can be inserted into any 2-channel speaker system.
These headphones and adaptor work great, and are very nice cosmetically. The power indicator LEDs work fine. Includes all original packaging and owner manual. To protect the original box, it will be put in a generic box.
In 1992 or 1993 one cable was cutting out so Signet replaced the cable AND drivers. A great vintage item that is still wonderful for music listening. I'll pay my PayPal fees, and buyer pays shipping.