Thank you for viewing. Rare, beautiful condition SONY MDR-E484 earphones headphones, tested and working, Sony Sound output confirmed. Model released in 1980. BIG TWIN TURBO NUDE STELLA SONY MDR-E575 Inner-ear type earphones Silver/Chrome coated case These are the same type as those included with the SONY WM-DD9 cassette player, making them a perfect match. These earphones will bring out the maximum performance. The top-of-the-line model, E484, which used an amorphous diamond diaphragm driver, was released at the same time, but the E575 features a twin turbo structure that further improves bass and a sapphire diaphragm unit. It is likely that the E575 had a better sound quality match with the DD9. In preparation for listing, we have inspected the contacts of each part, the contacts of the plug, and the cord for any disconnections. You can enjoy a clear sound typical of Sony with a sense of sound field. We believe this is in optimal condition for a vintage item to be collected, but please understand that it has been stored for a long period of time. ■Type: Open-air dynamic type ■Diaphragm: 16mm dome type (sapphire diaphragm) ■Impedance: 18Ω ■Frequency response: 8-26,000Hz ■Maximum input: 50mW ■Sensitivity: 108dB/mW ■Cord: 1.2m LC-OFC litz wire ■Weight: 6g (excluding cord) ■Release: August 1990 ■Discontinued: Around 1995 These are rare items from that time, which are very rarely seen. If you like them, please consider purchasing them.