Review: JBL's LSR Monitors
Part 1: The Holy Grail of Speaker Design, JBL's LSR Philosophy, The LSR Line
JBL's LSR-Linear Spatial Reference Studio Monitor System LSR28P and LSR25P near-field monitors
By careful design and match of the speaker's internal power amplifier to the driver units, the designer of a powered monitor can effectively "divorce" or remove an external power amp's influence over the drivers' performance and, therefore, the monitor's final sound. This "systems" approach to accurate monitoring and listening started with studio control-room design in the late 1970's, where designers controlled the room's shape, construction materials and placement of the soffit-mounted monitors. In these studio designs, the entire room and speakers are designed to work together as a total system to achieve an accurate sound at a certain focus point. For the most part, engineers were looking for good on-axis frequency response in these rooms...the mixing "sweet spot." With the loudspeakers available in those days, they were lucky to get that! Now, with the wider use of near-field monitors turning any existing room into an instant monitoring work space, the loudspeaker designer must go beyond on-axis performance and insure that the monitor performs well over a wide listening area in most acoustic spaces.
The LSR Philosophy
The LSR Line
LSR32 - a three-way system with a 12" woofer that's available in horizontal and vertical orientations
The 32, 28 and 25 speakers all have controls to revoice them to co-exist with an external subwoofer unit. On the front of all of these systems (except the LSR32) are green LED operating indicators that change to red when the system is in clip.
For purposes of this review, JBL kindly sent me two pairs: the LSR28P and LSR25P. Both the 28's and 25's are designed for vertical orientation and I advise not setting them up differently.