JBL LSR 6328P-Pak
The LSR6328P/Pak includes 2 monitors and the RMC kit

The JBL LSR6328P studio monitor is designed for use in critical stereo and multi-channel monitoring applications that require exceptional spectral accuracy and high SPL capability. The LSR6328P combines the latest in JBL's renowned transducer and system technology with psychoacoustically derived spatial response criteria, resulting in a more accurate studio monitoring reference system.

In this design process, the system's frequency response over the forward listening range (+/-15vertically and +/-30horizontally) 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 system that can be used for the most critical 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 identifies and corrects response to compensate 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 spectral shift as output power levels increase. An added third coil located between the drive coils acts as dynamic brake to limit excess excursion and reduces audible distortion at maximum levels. The cone is made of a carbon fiber composite 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 environments. 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-artifactfree 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 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 midbass 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.

RMC Equalization
Through the use of a test CD, sound level meter and Q template, the user can identify any dominant room mode over the tuning range from 26 to 96 Hz that effects the LF response at the listening position. The inverse curve can then be entered into the system's electronics - to exactly compensate the offending peak. Using the RMC Calibration Kit*, the user is also instructed specifically what to look for, and potentially poor room locations can be avoided. RMC kit contains all items required to carry out the RMC system calibration process.

Features