User manual MACKIE MR4 DATASHEET

[. . . ] The high-frequency section features a constant directivity horn with a built-in mechanical phase equalizer. The horn is driven by a Ferrofluid® cooled, 0. 5" Mylar® dome tweeter. The system is nominally crossed over at 4kHz by a 12 dB/octave network, which uses markedly lower (than conventional) inductance values in series with the woofer. [. . . ] 3 Recommended Amplifier is a power capability value that should be taken as a guide. distance using the inverse square law. Listed sound pressure represents an average from 300Hz to 3 kHz. 2 O Fo F66 PAAG E SE S PG MR4/4T Compact Two-Way Speaker Monitor 4/4T Vertical Polars 200Hz 0° 250Hz 315Hz 400Hz 0° 500HZ 630HZ 800HZ 1KHZ 1. 25kHz 0° 1. 6kHz 2kHz 2. 5kHz 0° 3. 15kHz 4kHz 5kHz 6. 3kHz Vertical Off-Axis Frequency Response (UP) 8kHz 0° 10kHz 12. 5kHz 16kHz Vertical Off-Axis Frequency Response (DOWN) 3 O Fo F66 PAAG E SE S PG MR4/4T Compact Two-Way Speaker Monitor 4/4T Horizontal Polars 0° 0° 200Hz 250Hz 315kHz 400Hz 500Hz 630Hz 800Hz 1kHz 0° 0° 1. 25kHz 1. 6kHz 2kHz 2. 5kHz 3. 15kHz 4kHz 5kHz 6. 3kHz Horizontal Off-Axis Frequency Respose 0° 8kHz 10kHz 12. 5kHz 16kHz 4 O Fo F66 PAAG E SE S PG MR4/4T Compact Two-Way Speaker Frequency response is measured on-axis at a distance referenced back to 1m at 1-watt drive. Frequency Directivity Index 6. 57" (167mm) 3. 58" (91mm) 45 ° 45° 6. 57" (167mm) 4. 84" (123mm) 1. 25" (32mm) 1. 73" (44mm) TOP SIDE 7. 17" (182mm) 4. 70" (119. 5mm) 2. 5" (63. 5 mm) 10. 32" (262mm) 5. 61" (142. 5mm) 2. 04" (52mm) FRONT REAR 5 O FoF66 PAGESE S PAG SPEAKER MR4/4T Compact Two-Way Speaker The two-way loudspeaker system shall be self-contained and consist of the following components: (1) a low-frequency driver; (2) a constant directivity horn driven by a dome tweeter 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 5 inches (130mm). It shall present a nominal load impedance of 8 ohms to the crossover network. The high-frequency section shall consist of a constant directivity horn driven by a Mylar® dome tweeter having a diameter of at least 0. 5 inches (12. 7mm). 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 and equalization for the constant directivity horn. 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, 5, 10, 20 and 30 Watts. 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. It shall be constructed using high density polystyrene and finished with black (or white), scratch resistant paint. [. . . ] The two-way loudspeaker system shall be a model MR4T (MR4WT - white) manufactured by Mackie Industrial. (continued Architects' & Engineers' Specs) MR4T Electronic files for this product available at: www. mackieindustrial. com This Specification Sheet Quick-Start Manual MR4T. PDF MR4TQS. PDF www. mackieindustrial. com 16220 Wood-Red Rd. NE, Woodinville, WA 98072 USA 888. 337. 7404, fax 425. 487. 4337, industrial@mackie. com UK +44. 1268. 571. 212, fax +44. 1268. 570. 809, uk@mackie. com ITALY +39. 0522. 354. 111, fax +39. 0522. 926. 208, italy@mackie. com FRANCE +33. 3. 8546. 9160, fax +33. 3. 8546. 9161, france@mackie. com GERMANY +49. 2572. 96042. 0, fax +49. 2572. 96042. 10, germany@mackie. com 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. [. . . ]