Driver Motor Systems
Designing a better subwoofer
THIEL’s excellence in loudspeaker engineering and design is what separates
us from other companies. Our in-house designed drivers represent state-of-
the-art technology and performance that greatly contribute to the exceptional
sound reproduction provided by our entire line of award-winning speakers.
• Unique short coil/long gap motor systems dramatically
reduce distortion for very clear and open reproduction.
• Very rigid aluminum diaphragms eliminate resonance
coloration for exceptionally uniform frequency response.
• Long excursion, long gap motor structures provide
greater output capability for realistically high sound
listening levels.
• Copper is used for magnetic field stability and reduced
voice coil inductance to greatly reduce distortion from
secondary effects.
• Heavy cast chassis, very large magnet assemblies, and
very high quality parts throughout contribute to high
performance.
SS2 woofer
2-1/2" diameter
voice coil
for high power
handling
Very large,
double-stacked
magnets for
good control
Copper ring to stabilize
magnetic field for lower
distortion and more tonal
reproduction
Copper pole sleeve for
lower distortion
Very long, 1-1/2" gap length
for very high output
with low distortion
Heavy cast aluminum
chassis for rigidity
and clarity
Short 6 layer
voice coil that never
leaves long gap
for low distortion
Very high excursion
suspension
Thick aluminum diaphragm
to maintain clarity under
high demands
SmartSub short coil/long gap woofer
To greatly reduce driver
distortion, THIEL uses an
unusual short coil/long gap
motor design which causes the
intensity of the magnetic field
acting on the coil to be constant
during movement.
Conventional long coil/short gap woofer
The difference is our engineering
Design & Engineering
Model SS2
0
5
10
15
20
0
2
4
6
8
10
12
14
16
Xmax = 15 mm in both cases
Long coil / short gap
Short coil / long gap
Peak excursion — ±mm
THD — %
Distortion of THIEL short coil/long gap woofer vs.
conventional long coil/short gap woofer
