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

DS18's PRO-HY6.4B Hybrid speakers break barriers to bring you the best of both worlds. Designed to conquer the elements, the PRO-HY6.4B is built with water-resistant paper cones to get LOUD against nature's forces! These speakers are built to withstand the harshest conditions, all while maintaining peak performance. The PRO-HY6.4B’s feature a high-volume 6.5" speaker and a 1" voice coiled driver, both rated at an astonishing 225W RMS and 450W MAX power handling. With a sensitivity of 96dB and a frequency response ranging from 100Hz to 20KHz, these speakers deliver crystal-clear sound across the entire audible spectrum. DS18's PRO-HY6.4B driver features a diaphragm crafted from titanium, renowned for its remarkable stiffness-to-weight ratio. This premium material guarantees extraordinary clarity, allowing you to hear every nuance and detail in your favorite music with pristine accuracy. The driver's magnet material is none other than neodymium, a powerful and lightweight material that ensures superior control and response. Every detail matters in the construction of the PRO-HY6.4B’s: its voice coil diameter of 1.5" and former made of glass fiber guarantee impeccable performance and durability. The cone, crafted from water-resistant paper, ensures longevity and resistance against the elements. The cloth surround, and retooled aluminum basket all contribute to an exquisite aesthetic that perfectly complements the exceptional audio quality.
Elevate your car audio system to new heights and let the PRO-HY6.4B redefine your audio expectations.

Product Highlights 

• 6.5" Hybrid Coaxial Mid-Range w/Driver
• RMS Power: 225 Watts(450 Watts Peak)
• Impedance: 4 Ohm
• Ferrite & Neodymium Magnets
• Water Resistant IPX5
• Easily Repaired With The PRO-HY/VC

Specifications: 

• Nominal Diameter: 6.5" (165.1 mm)
• Nominal Impedance: 4 Ohm
• RMS Power Handling: 225W
• MAX Power Handling: 450W
• Sensitivity (1w/1m): 96dB
• Frequency Response: 100Hz - 20Khz
• Recommended HI Pass Crossover: 120Hz
• Number of ways: 2 ways
• Pair or Single: Single
• Grill Included: Yes

Woofer Specifications:

• Voice Coil Diameter: 1.5" (38.6 mm)
• Voice Coil Former Material: Glass Fiber
• Winding Material: CCAW
• Cone Material: Water Resistant Paper (IPx5)
• Surround Material: Cloth
• Basket Material:Aluminum
• Basket Color/Finish: Glossy Red
• Magnet Material: Ferrite
• Magnet Weight: 27 Oz
• Displacement Volume: 0.047L / 0.0016ft3 

Thiele & Small Parameters:

• Equivalent Volume (Vas): 2.21L / 0.078ft3
• Excursion (one way) (Xmax): 9.2mm
• 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): 6.70g 

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" (76.2 mm)

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)
• Gross Single Unit Weight: 5
• Single Unit Box Dimensions (L x W x H): 7.25" x 7.5" x 5"