Pioneer S-IW551L Speaker User Manual


 
   
Acceptable sound is only achieved over a relatively small
ar ea due t o mismatched directivities and driver inter fer ence.
coplanar
pioneer cst technology
pioneer cst technology
coaxial
coaxial

Improves upon coplanar designs, with a larger but still
limited listening area by eliminating driver interference.
   
Matched directivity and elimination of driver interfer-
ence results in sound as realistic off-axis as on-center.
cst: coherent source transducer.
the concentric solution.
from a single point source, maximizing
image stability and dramatically
reducing interference.
Directivity is precisely controlled
at all frequencies, and direct and
reected sound arrives at the listener
with matched timbre—especially
important with in-ceiling speakers,
where unwanted reections compro-
mise clarity and impact.
Listeners enjoy a wider sweet spot
than with pivoting coplanar and
The CST employs a tweeter, con-
centrically mounted at the apex
of the bass/midrange driver cone
to maintain sonic coherence and
seamless linearity. This conguration
ensures that sound propagates as if
coaxial designs, while the CST’s
controlled dispersion increases
flexibility and installation options.
Uniform delivery of sound means that
even off-axis positions can promise
the excitement of a front-row seat.
The CST Uses Technology Developed From the TAD Reference One and EX Series Speakers.