Sennheiser HD-450
Not much is documented about the Sennheiser HD-450. The most complete record is a single listing in a 1993 equipment directory. HiFI-Stereo (1993, p.204) lists it as the HD 450 Studio Headphones, with a 10-foot cord, frequency response of 20-20,000 Hz, sensitivity of 94 dB SPL/mW, 1% THD, a 600-ohm impedance, and a weight of 4.8 ounces. The listed price was $109.
Past that listing, almost nothing is recorded. No production years, no design write-ups, nothing in the usual period sources. It appears to have been a studio-oriented model in Sennheiser's lineup of the early 1990s, and that is as far as the record goes.
- Type: Studio headphones (per period listing)
- Frequency response: 20–20,000 Hz
- Impedance: 600 ohms
- THD: 1%
- Sensitivity: 94 dB SPL/mW
- Cord: 10 ft
- Weight: 4.8 oz
- Period price: $109
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