JBL LSR6328P Specification

LSR6328P

Linear Spatial Reference

Bi-amplified Studio

Monitor 

Key Features:

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Advanced Linear Spatial Reference

design ensures flatter-off-axis response

for greater clarity at the mix position.

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RMC™ Room Mode Correction

provides electronic control of room

modes. User measurement and

calibration kit available.

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Differential Drive

®

technology with

dynamic braking for extended low

frequency response and minimal

power compression.

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Integrated bi-amplification with

factory calibrated sensitivities.

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Titanium composite high frequency

transducer with elliptical oblate

spheroidal waveguide for precise

pattern control.

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Magnetically shielded high frequency

transducer minimizes interference

when used in close proximity to

video monitors.

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High-Density baffle for high inertial

ground and low resonance.

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Linear Dynamics Aperture port

design eliminates port turbulence

and reduces port compression.

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Reinforced enclosure and convenient

mounting points for mounted

installation.

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Integral handles facilitate ease of

positioning.

The LSR6328P studio monitor is

designed for use in critical stereo and

multi-channel monitoring applications

that require exceptional spectral accura-

cy and high SPL capability. The

LSR6328P combines the latest in JBL’s

renowned transducer and system tech-

nology with psychoacoustically derived

spatial response criteria, resulting in a

more accurate studio monitoring refer-

ence system. In this design process, the

system’s frequency response over the

forward listening range (±15° vertically

and ±30° horizontally) is optimized, as

opposed to the conventional approach

of optimizing the response directly on-

axis. This design approach involved

careful component design, selection of

crossover frequency, and precise baffle

geometry and detail. The result is a sys-

tem that can be used for the most criti-

cal judgements of recording balance,

image placement, and equalization. The

matching of the LSR6328P system to the

listening environment is further

enhanced through the use of RMC, an

analysis/correction system that identi-

fies and corrects response to compen-

sate for the dominant low frequency

standing wave in the system’s room

response. In addition to a rich array of

performance features, the LSR6328P has

a reinforced enclosure and integral

mounting points to facilitate wall mounting. Recessed handles facilitate easy

positioning of the loudspeaker in the environment and aid in transportability.

218F Low Frequency Transducer

The 8" woofer is based on JBL’s patented Differential Drive

®

technology. With

dual 1.5" voice coils, power compression is kept at a minimum to reduce spec-

tral shift as output power levels increase. An added third coil located between

the drive coils acts as a dynamic brake to limit excess excursion and reduces

audible distortion at maximum levels. The cone is made of a carbon fiber com-

posite forming a rigid piston and is supported by a soft butyl rubber surround. 

053TiS High Frequency Transducer

The high frequency transducer has a 1" composite diaphragm integrated with

an Elliptical Oblate Spheroidal (EOS) Waveguide with wide uniform dispersion

that is critical to the smooth spatial response required in today’s working envi-

ronments. The driver is shielded to minimize the interference when used in

close proximity to video monitors.

Bi-amplified Power System

The LSR6328P combines two high power amplifiers with an active dividing

network. Included are over 250 watts of continuous low frequency power and

120 watts for the high frequency section. The active dividing network produces

a 36/dB-per-octave Linkwitz-Riley type response for smooth transition between

transducers, both in the frequency and time domains. This results in exceptional

imaging and a lack of time smear, and the circuitry also yields a tonal-artifact-

free noise floor.

Input Sensitivity and Equalization:

User adjustments include level calibration settings for use with professional

and semiprofessional equipment, as well as fine tuning with variable level trim.

Neutrik “Combi” input receptacles accommodate both XLR and 

¼" connectors,

either balanced or unbalanced. DIP switch 1 inserts a variable input trim for up

to 13 dB of input attenuation. DIP switches 2 & 3 allow selection of either 

-10 dBV, +4, or +8 dBu calibrated input sensitivities on the 

¼" or XLR inputs. A

Very Low Frequency (VLF) high-pass filter provides protection from excess

woofer excursion at maximum playback levels. DIP Switch 4 disables this filter

providing slightly extended deep bass response below the enclosure port tuning

and allowing the user to observe cone motion caused by sub-sonic signal.

Boundary compensation is user-selectable to correct low frequency and mid-

bass build-up when the speakers are placed close to a corner or wall. Three

settings (-1.5 dB, -3 dB, -4.5 dB) are provided using DIP switches 5 & 6. DIP

switches 7 & 8 provide 1.5 dB high-frequency boost and attenuation to allow

compensation for dull or bright listening environments.