About The Ex Series; Technology Behind The S-8Ex; Cst; Ceramic Graphite Diaphragm - Pioneer S-8EX-W Mode D'emploi

About the EX series

The EX series, incorporating the abundant technological know-how behind Pioneer's flagship TAD speaker series, was developed
with the goal of creating the ultimate speaker possible in its price range.
The design and production of the EX series result from an international effort that represents the finest in Pioneer's speaker technology.

Technology behind the S-8EX

CST

The core driver of the system is the Coherent Source Transducer
(CST), which draws on the technology used in TAD. The tweeter
diaphragm is mounted concentrically within the apex of the
midrange cone and provides a point source of sound from
400 Hz to 100 kHz. The CST ensures a perfect spectral balance
between the direct and reflected sounds that arrive at the
listener's ears, providing a more consistent sound throughout the
listening room and improved imaging capability.

Ceramic Graphite Diaphragm

The CST's tweeter features a ceramic graphite diaphragm that
provides top-level strength and dampening characteristics that
are practically unrivaled by any other available materials currently
used in high-end audio speaker systems. Ceramic graphite's
lightness and exceptional strength combine to create speakers
whose diaphragm resonance can be pushed far beyond their
audible range.
Velocity (m/s)
18 000
16 000
14 000
12 000
10 000
8 000
6 000
4 000
2 000
0
0.005
Inner Loss

Magnesium Alloy Diaphragm

The CST's midrange features a magnesium alloy diaphragm
whose characteristic lightness and high inner loss provide
excellent transience and minimal coloration of midrange sounds.
4
En
0.015 0.025

Bass Drivers

The bass driver pictured below serves as the foundation of the
S-8EX speaker system. The driver's strength is the result of the
Aramid/Carbon composite material, originally created during the
development of the S-1EX, that is used in its diaphragm. Pioneer's
exclusive LDMC magnetic circuit technology has been
incorporated in order to preserve linearity from low to high output
levels and minimize distortion.

Bass Enclosure Construction

The unique form of the S-8EX is based upon logical necessity. In
order to synchronize the arrival time of sound from the CST and
the two bass drivers, each driver is mounted upon a baffle that
serves to create a highly delicate curve known as the "precision
curve" (see illustration below). Made of up to 65 mm thick MDF
(Medium Density Fiberboard), this baffle is, moreover, strong
enough to contain the force of the drivers. Additionally, the bass
port has been carved out of an extremely thick block of MDF,
resulting in the reduction of wind noise for clear, deep bass.
Precision curve