INCLUDES: 4x 6MR400-4 BULLET 6" Mid Range Bullet Loudspeakers FEATURES: The MR BULLET was conceived with one goal in mind: High-Performance! Featuring an Aluminum Phase Plug (Bullet), this mid is built like a professional mid range loudspeaker, but it has been designed for use in the mobile audio market, as we called it Pro Audio On Wheels®!! By combining elements from PRO Audio and Car Audio, we have developed a NEW type of high efficient mid range that is able to give high levels of output for your custom door. Highlights Built to Perform at Wide Frequency Range: 145 – 12,500 Hz Highest Quality Speaker with bullet design available High efficiency: 95 dB guarantees High Output Levels Handles 400 Watts – Endurance at Loudest Volumes Vented Air pole piece for heat dissipation Center phase plug for even sound distribution 4 Ohms Impedance Also available in 8″- 8MR500-4 BULLET The “bullet” phase plug is made from pure aluminum acting as a radiator cooling system for the voice coil and machined to perfection for even sound dissipation. Beyond good looks, this cone is extremely light, providing excellent damping to keep an incredibly natural yet accurate sound. A triple roll cloth surround, combined with an optimized fiber pressed paper cone, ensure the speaker’s frequency response is smooth and extends to high range making an easy transition to a super tweeter, but according to customers, the high-frequency response from this speaker does NOT need support from a tweeter! The suspension design of this mid range features a single layer spider – which connects to the coil former with premium stitched lead wires, all being driven by a copper-clad aluminum wire voice coil providing high efficiency and excellent power handling. Its high-performance characteristics and high-quality components provide exceptional clarity, detail, and dynamics sound. You can expect outstanding sound stage quality and realistic sound reproduction for a great value. This is the new standard of value in high-performance bullet speakers. Built to perform and able to handle 400 watts of continuous power, this mid range is the perfect match on 3-way custom door system such as: 10W500-4 + 6MR400-4 BULLET + TW450Ti-ND-4 making the ultimate sound reproduction machine, with unbeatable sound quality and output. Technical Details GENERAL SPECIFICATIONS Nominal Diameter 6″ (152 mm) Nominal impedance 4 Ohms Rated AES Power Handling (RMS) 200 Watts Program Power 400 Watts Sensitivity 2.83V at 1m 95 dB Recommended Hi Pass Crossover** **For Full Power Handling 145 Hz** **12db Per Octave Crossover Frequency Response at -10dB 145 – 12,500 Hz Voice Coil Diameter 1.5″ (38 mm) Voice Coil Wire CCAW Voice Coil Winding Depth 9.5 mm Former Material Kapton Magnetic Gap Depth 6.0 mm Frame Material Stamped Steel THIELE-SMALL PARAMETERS Equivalent Volume Vas 4.40 l Excursion (mathematical)*** Xmax 3.25 mm Free Air Resonance Fs 144.1 Hz Mechanical Factor Qms 11.98 Electrical Factor Qes 0.64 Total Factor Qts 0.60 Cone Area Sd 143 cm² Mechanical Mass Mms 7.94 g Bl Factor Bl 6.37 Tm Dc Resistance Re 3.6 Ohms Inductance Le 0.136 mH at 1 kHz Mechanical Mass Without Air Mmd 6.97 g Mechanical Compliance Cms 0.154 mm/N EXTRA INFO Overall Diameter 6.59″ (167.5 mm) Front Mount Baffle Cutout 5.65″ (143.5 mm) Mounting Depth 2.62″ (66.5 mm) Overall Depth 2.99″ (73.5 mm) Net Weight 4.81 Lbs (2.18 kg) unit Shipping Weight 5.18 Lbs (2.35 kg) Carton Dimensions W x L x H 8.50″ x 8.50″ x 3.35″ (175 x 175 x 85 mm)