JBL LSR6325P-1 User Manual
LSR6325P-1
Key Features:
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High Performance bi-amplified
design with proprietary JBL
transducer technology.
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Titanium composite high-frequency
transducer.
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LSR Linear Spatial Reference
technology ensures neutral off-axis
response for greater clarity at the mix
position.
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User-selectable Boundary
Compensation restores accurate
response when speaker is positioned
near a wall or on a work surface.
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Front Panel Volume and Power
Controls.
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Integrated mounting points.
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Magnetic shielding minimizes
interference when used in close
proximity to CRT monitors.
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Die cast aluminum enclosure
provides high inertial ground for
optimum transducer performance
and low resonance.
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THX pm3®approved.
The LSR6325P-1 Studio Monitor
provides ultra-accurate response and
exceptional SPL capability in a very
compact form factor. THX pm3
approved, the LSR6325P-1 is ideal for
stereo and surround recording, post
production and broadcast systems
where space is limited but accuracy
and high-output are required. The
LSR6325P-1 Studio Monitor combines
JBL's latest in transducer and system
technology and incorporates the LSR
Linear Spatial Reference design to
provide greater accuracy at the mix
position. The Linear Spatial Reference
(LSR) philosophy is based on a set of
design goals that optimize the overall
performance of the system in a variety of acoustic spaces. Instead of
focusing on a simple measurement
such as on-axis frequency response,
LSR design requires the system meet
frequency-response criteria for seventy-two off-axis measurements.
Carefully-controlled dispersion,
achieved through transducer design,
crossover frequency selection and
engineering of the enclosure, ensures
not just the on-axis sound, but also
the reflected sound which reaches of
the mix position is neutral.
®
Linear Spatial Reference
Bi-Amplified Studio
Monitor
By incorporating LSR into the system design the LSR6325P-1 delivers greater
high and mid frequency accuracy to the mix position, in a broad range of
production environments.
Low Frequency Transducer
The 5.25" woofer is based on JBL's research and field proven experience
in low distortion, high excursion designs. The cone forms a rigid piston and
is supported by a butyl rubber compliance. The motor structure incorporates Symmetrical Field Geometry (SFG) with an integral shorting ring for
maximum linearity. The high excursion capability provides a substantial
increase in dynamic range over typical transducer design. A cast aluminum
basket provides advanced heat dissipation for low power compression. The
powerful structure is shielded for use in close proximity to CRT monitors.
High Frequency Transducer
The high frequency device is a 1" composite diaphragm integrated with
an Elliptical Oblate Spheroidal (EOS) Waveguide with 60 x 100 degree dispersion which is critical to the smooth spatial response required in today's
working environments.
䉴 LSR6325P-1 Linear Spatial Reference Bi-Amplified Studio Monitor
Bi-Amplified Power System
The LSR6325P-1 combines two high-power amplifier
sections with an active crossover system. 100 watts of
low-frequency power and 50 watts to the high-frequency section provide maximum dynamic range. A bi-color
LED indicates power and any onset of clipping in
either amplifier section. Active crossover circuitry
results in a 24 dB/Octave Linkwitz-Riley Electroacoustic response between low and high frequency
devices for smooth transition in both the frequency and
time domains. This results in exceptional imaging, a
lack of time smear, and superior off-axis response linearity. A variable level control and dual input sensitivities allow use with a broad range of professional and
semi-professional equipment. Balanced and unbalanced
signals can be accommodated with an XLR input. An
unbalanced RCA input is also provided. The frequency
response can be gently tailored to compensate for
placement and room absorption characteristics. Users
can select between two different high frequency
response contours. A low-frequency filter at 80 Hz can
also be added for use with subwoofers that contain
their own low pass filtering. A unique Boundary
Compensation control adjusts the bass and mid-bass
output for optimum performance when the system is
positioned near a boundary, on the meter bridge of a
console or work surface.
Linear Spatial Reference Design and Measurement Techniques
We all know that many loudspeakers have similar measurements but sound different. By going beyond simple
on-axis frequency response measurements, JBL defines the
ultimate performance specification for new systems - what
it will sound like in your room. While other manufacturers
use a single on-axis frequency response measurement
taken at one point in space, JBL measures monitor systems over a sphere that encompasses all power radiated
into the listening room - in every direction. This data
reflects 1296 times the information of a single on-axis
LSR6325P-1 Response Curves
response curve. Seventy-two measurements of the direct
sound field, the reflected sound field, and the reverberant
field, the entire sound field heard by the listener, are correlated to optimize response at the listening position. In
place of spectral smoothing used by some manufacturers,
which actually conceals data, the JBL approach actually
exposes flaws in systems, such as resonances, poor dispersion and other causes of off-axis coloration. The data
shown below is a set of spatially measured graphs that are
the heart of JBL's philosophy.
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