Mackie MR3STK Spec Sheet - Page 6

SPEAKER MR3STK Compact Coaxial Speaker MR3STK Architects' and Engineers' Specifications The two-way loudspeaker system shall be self-contained and consist of the following components: (1) a low-frequency driver; (2) a high-frequency dome tweeter driver that is coaxial with the low-frequency driver; (3) a two-way crossover network; (4) a constant voltage transformer; (5) a vented enclosure. The low-frequency transducer shall be a cone type loudspeaker having a carbon fiber cone with a diameter of at least 4.75 inches (120mm). It shall present a nominal load impedance of 8 ohms to the crossover network. The high-frequency driver shall be a titanium metalized dome tweeter having a diameter of at least 0.5 inches (13mm). Its voice coil shall be treated with Ferrofluid® to aid in cooling. It shall present a nominal load impedance of 8 ohms to the crossover network. The system shall be crossed over by an internal, highlevel, passive network having a response of 12 dB/octave. The nominal crossover frequency shall be 6kHz. The low-pass section of the network shall have minimum inductance in series with the low-frequency driver. A dynamic high-frequency protection circuit based on a low-value, low-mass filament resistor shall limit the current available to the high-frequency driver. The crossover network shall present a nominal 4-ohm load impedance to the power amplifier or built-in constant voltage transformer. The constant voltage transformer shall have multiple power taps at 1, 2.5, 5, 10 and 20 Watts. It shall also have voltage taps at 25, 50, 70 and 100 volts. Two detented rotary switches shall be provided on the input panel to adjust the power and voltage taps of the transformer. The voltage tap switch shall have a position to bypass the transformer and allow the loudspeaker to present a 4-ohm load to a directly coupled power amplifier. The enclosure shall be a vented design. It shall be constructed using high density polystyrene and finished with black (or white), scratch resistant paint. It shall be trapezoidal in shape with 45° angled sides. A full size, detachable, perforated steel grille, finished in black (or white) scratch resistant paint shall be provided. At least 4 reinforced threaded metal sockets (3/8" and M6) for attaching optional mounting hardware shall be provided. The overall dimensions of the enclosure shall not exceed (HxWxD) 8.27" x 5.91" x 5.31" (210mm x 150mm x 135mm). The total weight of the loud- (continued Architects' & Engineers' Specs) speaker shall not exceed 5.5 lbs. (2.5 kg). Connections to the loudspeaker shall be two color coded, spring loaded push connectors. The loudspeaker system shall have an overall frequency response of at least 140Hz-21kHz when measured to -10 dB and at least 180Hz-19kHz when measured to -3 dB. It shall have a nominal average coverage pattern of at least 110° horizontal by 110° vertical to -6 dB when measured between 800Hz and 16kHz. Calculated 1W/1m sensitivity shall be at least 89 dB when measured in the far field between 300Hz and 3kHz. Maximum SPL shall be at least 108 dB at 1m. The loudspeaker shall be rated for continuous operation at 35W IEC with 140W peaks. The two-way loudspeaker system shall be a model MR3STK (MR3SWTK - white) manufactured by Mackie Industrial. Electronic files for this product available at: www.mackieindustrial.com This Specification Sheet Quick-Start Manual MR3STK.PDF MR3STKQS.PDF www.mackieindustrial.com 16220 Wood-Red Rd. NE, Woodinville, WA 98072 USA 888.337.7404, fax 425.487.4337, [email protected] UK +44.1268.571.212, fax +44.1268.570.809, [email protected] ITALY +39.0522.354.111, fax +39.0522.926.208, [email protected] FRANCE +33.3.8546.9160, fax +33.3.8546.9161, [email protected] GERMANY +49.2572.96042.0, fax +49.2572.96042.10, [email protected] Mackie Designs continually engages in research related to product improvement. New material, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current Mackie Industrial product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated. ©1999-2002 Mackie Designs Inc. All rights Reserved. Mackie and the "Running Man" figure are registered trademarks of Mackie Designs Inc. Mackie Industrial is a trademark of Mackie Designs Inc. part no. 910-178-10 Rev.C 6 O FoF66 PPAAGEGSE S SPEAKER