The JK318A is a single-box approach to full-frequency sound, offering the ultimate in size/performance ratio from a compact and lightweight (59kg) system. Within a 1240 x 534 x 524mm footprint, the cabinet packs an 18-inch neodymium woofer with four-inch voice coil for solid, convincing low-end, a 12-inch neodymium woofer with three-inch voice coil for powerful, unfaltering mids and a 1.75-inch PETP diaphragm neodymium driver for crystal clear high frequencies, making it a true three-way loudspeaker that faithfully reproduces the full acoustic spectrum from 35Hz to 19kHz, with a continuous output level of up to 132dB at one-metre.
The JK318A's amplifiers, with switching power supply, are matched to digital electronics featuring 48-bit DSP architecture and 24-bit/48kHz analogue converters, keeping all signals in perfect check and making possible the extensive capabilities of the loudspeaker. In common with all Joker series systems, its customised transducers were developed to match the properties of the high quality plywood cabinet.
This results in exceptional low frequency control and mid-bass vocal performance, while the output of the HF driver remains unimpaired even at very high levels. Thanks to its asymmetrical horn, the JK318A offers a flexible dispersion pattern for excellent coverage, both in the wide, short throw zone and the narrow, long throw zone, says the company.
Master Audio CEO Juan Amate, who devised the JK318A and closely supervised its development process, commented, "The JK318A represents a natural evolution of the classic "2 x 15" that was commonplace during the 80s and 90s, but which doesn't quite meet the full-frequency reproduction demanded from today's small-format PA. Of course, this need can still be served by a passive two-way system with external amps, electronics and sub, but we've taken all this power and more, squeezed it into a single, compact and lightweight cabinet, and tailored each and every component so it works in perfect harmony with the next - it really is something to see and hear."
(Jim Evans)
