JBL LSR 25 P (Paar)

The LSR25P Studio Monitor combines JBL’s latest in transducer and system technology and incorporates the LSR Studio Monitor System design philosophies. The LSR25P is sized to provide an extremely accurate reference for workstations, edit suites and small control rooms.

The Linear Spatial Reference (LSR) philosophy is based on a set of design goals that carefully control the overall performance of the system in a variety of acoustic spaces. Instead of focusing on a simple measure such as on axis frequency response, LSR designs require much better control over dispersion via transducer design and crossover frequency selection. Critical decisions of image placement, EQ, balance and timbre are typically made within +/- 15° vertically and +/- 30° horizontally. This workspace is where the engineer, producer and artist make critical mixing decisions. By incorporating LSR into the system design requirements, placement rules are relaxed, a more stable stereo image is maintained and off axis coloration is minimized.

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 within close proximity of video monitors.

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.

The LSR25P 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.

User adjustments include level calibration for setting with professional and semi professional equipment and allow fine tuning of levels with a variable level control. 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 80Hz can also be added for use with subwoofers that contain their own low pass filtering.

A unique Workstation Boundary Compensation control adjusts the bass and mid-bass output for optimum performance in workstation environments. Instead of a simple change in level, this control precisely maintains correct spatial response when used next to video monitors in typical workstation environments.

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