Lowther Loudspeaker Systems Ltd.

Where Technology Becomes "Live" Music

Exploded View of PM4A
 
EXPLODED VIEW OF PM4A DRIVE UNIT

 

The above drawing illustrates the construction of a Lowther drive unit. The unit shown above is a PM4A, and is typical in it's complexity.

 

1 & 2 Full Stabilizer (2) with Fixing (1). For use with forward radiating horns.
3 Forward Suspension of polyester foam specially treated for tropical climatic conditions of high humidity.
4 Coil Former with balanced Voice Coil.
5 Treated Whizzer Cone.
6 Treated Base Cone.
7 Rear Suspension of polyester foam specially treated for tropical climatic conditions of high humidity.
8 Cast aluminium support Chassis, with tapered flange at rear to create perfectly air tight seal to baffle.
9 Magnet Top Plate of high permeability magnamax.
10 Top Plate Insert of super alloy capable of maximum permeability of 2.4 tesla.
11 Cast Magnet of Alcomax 5 alloy.
12 Pole Piece of super alloy to match Top Plate Insert.
13 Magnamax Centre Pole.
14 Magnet Fixing Rods.
15 Base Plate of lead free low carbon rolled steel.
16 Cast aluminium Support Housing.

 


 

Specifications subject to amendment without prior notice where design developments permit advancement.

 

Designed, made in England and distributed world-wide by:

 

LOWTHER LOUDSPEAKER SYSTEMS. P.O. Box 184, Sidcup, Kent DA14 4NL, ENGLAND.