Designer's Notes
09
Drivers
Anew
For the new 770, we have chosen a lightweight, damped microfibre dome
with a super smooth response, backed by a damped rear chamber that
pushes the fundamental resonance well below the crossover region. The
quality of this 28mm treble dome matches and marries to the polypropylene
bass/midrange to ensure evenness of character throughout the range of the
whole speaker.
The original 770 crossover used a single coil to both balance and equalise the
bass to midrange response as well as cross over to the treble unit, the latter
driven by a resistor, capacitor and coil combination. This was always going to
be a compromise solution as it is not easy to use just a few components to
perform both functions.
Today’s advanced software crossover mapping and measuring techniques
allow us to accurately equalise the bass/midrange balance and adjust the
crossover to the treble unit by mapping the acoustic crossover slopes
accurately. The simplicity and elegance of the original 770 crossover has been
maintained, with additional elements added only to optimise the crossover
performance while retaining the musical character.
The best acoustic performance, featuring a seamless transition between the
bass and treble units while retaining all the thrilling musical detail and
emotion of the performance, has been realised through hundreds of hours of
listening sessions, using a wide variety of music.
Rear Chamber
Gasket
Vented Spacer
Sub-magnet
Foam Damping
Copper Wound
Glass Fibre Voice Coil
Microfibre
Polyester Dome
T-yoke
Main Magnet
Top Plate
Gasket Aluminium
Front Panel
Felt Damper
Above: Exploded technical diagram for the new Mission 770 treble unit.
Important
Safety Instruction
Music Leads,
Technology Follows
Loudspeaker Installation
Warranty Coverage
Technical Data
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