midrange
cone
voice
coil
tweeter
dome
coupling
suspension
midrange
suspension
THIEL PCS compound
Mid / Tweeter
Moving system
Cast aluminum chassis
Aluminum diaphragm
Large magnet
Long magnetic gap
Short voice coil
Copper pole sleeve
Shielding magnet
PCS WOOFER
• The aluminum diaphragm
is stiff enough so that all internal
resonances are above the
operating range of the driver.
The lowest diaphragm resonance
is at 4.5 KHz, 2-1/2 octaves
above its crossover frequency.
Below this frequency there is no
internal energy storage to reduce
clarity.
• The copper pole sleeve
reduces the voice coil’s
inductance and, therefore, the
distortion caused by the
nonlinearity of this inductance
due to its steel core of the
magnetic pole. It also reduces
distortion by stabilizing the
magnetic field strength through
its self inductance.
• The long magnetic gap and
the short voice coil ensure that
the entire coil is within the
magnetic gap during excursions
and therefore that the coil is
acted upon by a very uniform
magnetic strength. Distortion is
greatly reduced since the coil
sees a magnetic strength that
does not change with its
position.
Mechanical crossover
10K
Frequency
1K
10
5
0
-5
-10
-15
-20
-25
100
20
20K
Amplitude — dB
Combined output
Tweeter
Midrange
