Visual Sound PR 12D 扬声器

Peavey Electronics","The Peavey PR 12D is a powered, bi-amplified, two-way speaker system engineered to provide very high levels of performance in a compact powered loudspeaker. The PR 12D is capable of up to 120 dB peak SPL. the enclosure utilizes tough polypropylene in an injection-molded plastic trapezoidal form, with a coated steel grille to offer an attractive yet-durable powered speaker system. This two-way powered system is comprised of a 150 W class D power amplifier driving a 12\" heavy duty woofer. The RX™ 14 compression driver is driven by a 50 W class D power amplifier and features a 1.4\" titanium diaphragm coupled to an extremely smooth and well-controlled constant directivity horn (with a coverage pattern of 90\" by 40\") that is molded integrally into the enclosure. A balanced input to the preamp\/EQ electronics consists of one combo female XLR and 1\/4\" TRS phone jack. It is switchable between mic-level and line-level sensitivity. Two 1\/4\" phone jacks are provided for link-out \/ direct-in capability. The link-out is a post-level and pre-crossover. While the direct-in is a circuit pre-crossover input. A woofer servo senses back-EMF from the woofer voice coil that is not a result of the drive signal, and subtracts the error so that the woofer cone follows the drive waveform precisely. constant Loudness (Fletcher-Munson) circuit for accentuating bass and treble at low listening volume levels. The power amplifiers providing the bi-amplification are low-distortion units providing 150 W continuous RMS into the nominal 8 ohm load of the woofer, and a 50W continuous RMS into the nominal 8 ohm load of the tweeter. They were selected for their reliability and superb musical performance capability. both amplifiers feature out patented DDT™ compression, which virtually eliminates audible power amplifier clipping. A molded-in handle provides ease of transport, while multiple mounting points (top and bottom) for the Peavey Versamount™ allow maximum utility.