Audio-Technica ATH-2 (1970s)
An open-back planar magnetic headphone introduced by Audio-Technica in the 1970s, notable for early orthodynamic driver design.
Overview
The Audio-Technica ATH-2 is an open-back, planar magnetic headphone first made in the 1970s. Marketed as "planar moving coil dynamic stereophones" and described using terms like "open-air, velocity" type, these headphones represent an early implementation of orthodynamic driver technology by Audio-Technica. Known for their distinctive engineering approach, the ATH-2 was remembered by users as a significant entry into high-fidelity personal audio, with one noting it was their "first audiophile can." The model has since gained a cult following among vintage headphone enthusiasts.
Specifications
| Type | Open-air, velocity |
| Sensitivity | 98 dB at 1 volt |
| Distortion | Less than 0.8% at 110 dB SPL |
| Impedance | 20 Ω (Hi-Fi Stereo Buyers PDF) / 4~60Ω (Head-Fi forum) |
Design
The ATH-2 uses an orthodynamic/planar magnetic driver type, a technology that employs a thin conductive membrane suspended within a magnetic field to produce sound, offering uniform drive across the diaphragm for reduced distortion. The design is open-back, contributing to a natural sound presentation.
Market
Originally priced at $49.95, the ATH-2 now sells in used condition for around $100, reflecting its status as a collectible piece of headphone history.
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