About: DS18 PRO-HY6.4B 6.5" Mid-Range Water Resistant Loudspeaker with Built-in Driver 225W RMS -  4 Ohm (Each) 

DS18's Hybrid speakers give you the best of both worlds of mids and highs combined into one pro audio combination speaker. This high powered pro audio mega speaker combines both a 6.5 high volume midrange speaker that also has a high wattage driver attached to the rear to give you a full range of frequencies at an amazingly loud volume. These Hybrids have water resistant cones to help battle elements and are perfect for people looking to place a high wattage, high volume loudspeaker together without having to separately mount am additional driver.

Product Highlights:

• Hybrid design combines high wattage midrange and driver together in one beautiful frame.
• High volume 6.5 and 1" driver rated at 225w RMS and 450max for crazy loud volume in a full range of frequencies.
• Water resistant cone to help battle elements and moisture making them great for motorcycles, boats, and regular vehicles too!

Specifications:

• Nominal Diameter: 6.5"
• Nominal Impedance: 4 Ohms
• RMS Power Handling: 275 Watts
• Peak Power Handling: 550 Watts
• Sensitivity: 96dB
• Frequency Response: 100Hz - 20KHz
• Recommended Hi Pass Crossover: 120 Hz
• Sold Individually 

Midrange Specifications: 

• Voice Coil Diameter: 1.5” (38.6 mm)
• Voice Coil Former Material: Glass Fiber
• Winding Material: CCAW
• Cone Material: Water Resistant Paper
• Surround Material: Cloth
• Basket Material: Aluminum
• Basket Color/Finish: Glossy Red
• Magnet Material: Ferrite
• Magnet Weight: 27 oz
• Displacement Volume: 0.047L

Thiele & Small Parameters

• Equivalent Volume (Vas): 2.211L
• Excursion (Xmax): 9.2 mm
• Free Air Resonance (Fs): 199Hz
• Mechanical Factor (Qms): 5.96
• Electrical Factor (Qes): 1.524
• Total Factor (Qts): 1.214
• Mechanical Mass (Mms): 8.654g
• Mechanical Compliance (Cms): 73.792 mm/N
• BL Factor (BL): 4.769
• Voice Coil Inductance (Le): 4.22mH
• Cone Area (Sd): 145.26 Cm2
• DC Resistance (Re): 3.2 ohms
• Mechanical Mass w/o Air (Mmd): 6.7g

Driver Specifications: 

• Voice Coil Diameter: 1” (25.4 mm)
• Voice Coil Former Material: Kapton
• Winding Material: CCAW
• Diaphragm Material: Titanium
• Magnet Material: Neodymium
• Horn Diameter: 3.26"

Measurements:

• Overall Diameter: 6.85" (174 mm)
• Overall Depth: 4.28" (108.8 mm)
• Front Mount Baffle Cutout: 5.91" (150 mm)
• Mounting Depth: 3.92" (99.5 mm)
• Motor Diameter: 4.65" (118 mm)