Mackie MR4T MR4 Quick Start Guide - Page 5

MR4/MR4W Specifications System: Freq. Range (-10 dB): 75Hz-21kHz Freq. Response (-3 dB): 160Hz-18kHz Horz. Coverage Angle (-6 dB): 120°, averaged 800Hz-16kHz Vert. Coverage Angle (-6 dB): 100°, averaged 800Hz-16kHz Directivity Factor Q (DI): 5.6 (7.5), averaged 800Hz-16kHz System Sensitivity 1: 88 dB, 1W@1m Rated Maximum SPL: 109 dB @ 1 m (3.3 ft) peak Rated Nominal Impedance: 4Ω (bypassed) System Input Power Rating 2: 60W IEC, 240W Peak Recommended Amplifier 3: 250W Crossover Frequency: 4.0kHz Transducers: Low Frequency: 5" (130 mm) carbon fiber woofer High Frequency: 0.5" (13 mm) mylar dome tweeter, Ferrofluid® cooled Physical: Enclosure: 45° back angles, high density polystyrene Attachment Inserts: 4 integrated threaded insert points Color: Matte black (MR4) White (MR4W) Grille: Matching perforated steel grille Input Connectors: Spring-loaded terminal Dimensions HxWxD: 10.32 in x 7.17in x 6.57 in (262 mm x 182 mm x 167 mm) Net Weight: 6.6 lb (3.0 kg) Options: MA5-6: Plate for suspending 4 clustered speakers, Black MA5-7: Speaker tilt bracket for MA5-6, Black MA5-9 (MA5-9W): U-bracket, Black (White) MA-7B (MA-7W): Wall-mount support bracket, Black (White) 1 Measured on-axis in the far field with 1 watt (2.00V RMS @ 4Ω ) input and referenced to 1 meter distance using the inverse square law. Listed sound pressure represents an average from 300Hz to 3kHz. 2 IEC Spectrum, peak for 2 hours with +4.5 dB crest factor. 3 Recommended Amplifier is a power capability value that should be taken as a guide. 5