
characteristically transparent midrange, fast,
attacking bass, and outstanding clarity.
A further advantage is greater bass extension
and loudness than a ported or sealed
design of a similar size, even if similar drivers
were used. Moreover, the very consistent
bass driver loading brings the welcome
benefit that the frequency response remains
consistent regardless of listening level, and
analytical auditioning can be conducted
without the need for high replay volumes to
achieve optimal bass response – a unique
and very valuable characteristic.
PMC’s unique
ATL
™
(Advanced
Transmission Line) enclosures have taken
loudspeaker design to the highest level,
using sophisticated cabinet construction,
proprietary drive units, and patented
absorption materials and techniques. The
benefits are enormous compared to the
relatively simple sealed and ported designs
currently available elsewhere.
PMC’s innovative approach places the bass
driver near one end of a long tunnel (the
Advanced Transmission Line). This tunnel
is heavily damped with acoustic material
specified carefully to absorb the upper bass
and higher frequencies radiating from the
rear of the bass driver. The lowest frequencies
are allowed to pass down the line and
emerge from the large vent in the same
polarity as the driver’s frontal radiation,
the vent acting essentially as a second bass
driver.
An important benefit of the
ATL
™
approach
is that the air pressure inside the cabinet,
loading the bass driver, is maintained.
This helps to control the driver over a wide
frequency range and significantly reduces
LF distortion. Consequently, the upper bass
and midrange detail is not masked by
harmonic distortion and the result is PMC’s
Advanced Transmission Line:
How it works
TM
Advanced Transmission Line
‘No other bass loading technology provides such resolution and tonal accuracy at all volume levels’
IB2S XBD-A
Содержание IB2S-A
Страница 1: ...User Guide IB2S A Series TM Advanced Transmission Line ...
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Страница 45: ...ULTIMATE MONITORING ...
Страница 46: ...T 44 0 870 444 1044 E sales promonitor co uk W www pmc speakers com Job No 206 IB2S A manual V2 May 2012 ...