Mission 750LE (c. 1997–1998)
The 750LE is a limited-edition speaker whose surviving documentation rests almost entirely on a pair of Audio magazine pieces from 1997–98. It was announced in the December 1997 "What's New" section as Mission's 20th-anniversary model, built for worldwide production (Audio, December 1997, p.18), and it received a full equipment profile by D.B. Keele Jr. the following summer.
It is a two-way, ported stand-mount speaker with gold-plated, bi-wirable terminals (Audio, August 1998, p.57). The woofer used an Aerogel cone — a material its designer, Robin Marshall, explained is around 50% more rigid than an average paper cone yet 75% lighter, with a high internal loss that damps surface resonances (Audio, August 1998, p.57). The cabinet was designed with computer-aided solid modeling; its panels form two interlocking U-sections that Mission described as self-braced and self-damped (Audio, August 1998, p.56).
Keele's measurements and listening give a clear picture of its character. Bass was limited: only some usable output at 50 Hz, stronger from 60 Hz up, and the port produced audible wind noise on material with heavy low bass (Audio, August 1998, p.61). On music without heavy bass, though, it could play loud and clean — big-band recordings sounded well balanced, horn sections came through with expression, and the center image and spectral stability were first-rate (Audio, August 1998, pp.60–61). In short: a well-engineered anniversary stand-mount with real strengths and a plainly stated bass limitation.
Known specs at a glance:
- Two-way vented stand-mount speaker
- Aerogel-cone woofer with rubber surround
- Gold-plated bi-wirable terminals
- Self-braced / self-damped interlocking-panel cabinet
- Limited Edition for Mission's 20th anniversary
- Designer: Robin Marshall
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