JL Audio C7-650CW

The C7-650CW high-end mid-woofers from JL Audio redefine the car speaker experience. Designed as a 6.5" (16.5cm) diameter component woofer, these speakers pack innovation and advanced design into a compact, powerful package. The advanced technology features include exceptional linear excursion, excellent linearity and minimal distortion. These speakers can be used in 3-way systems with mid-range and tweeter or in 2-way configurations with a tweeter. Another plus point is that their use in active systems without passive crossovers is recommended. The C7-650CW measures up to industry standards and offers a strong, precise performance in the midrange range.

• 6.5-inch (165 mm) component bass-midrange driver, with grille
  
• C7 is the pinnacle of JL Audio's car speaker design, benefiting from JL's most advanced development tools and full commitment to precision manufacturing.
  
• The C7-650cw component woofer can operate in a 3-way system with a midrange and a tweeter, or with just a tweeter in a 2-way configuration. It has been designed from the ground up to have exceptional linear excursion and excellent linearity, resulting in a solid midrange and pure, precise midrange performance. Distortion and non-linearity have been minimized by optimizing the dynamic motor and suspension behavior.
  
• Passive crossovers are not included with the C7 drivers as they are designed for active systems. Instead, we recommend a high-quality tuning DSP, such as the JL Audio TwK™ 88 or D8, or a VXi amplifier with built-in DSP, with a dedicated amplifier channel for each C7 speaker in the system. Precise adjustment of equalization, delay and crossover filters ensures optimum performance in the vehicle.
  
• C7-650cw design notes:
  
• Cone and dust cap: Vacuum-formed, mineral-filled polypropylene material provides excellent damping and low mass. The cone body has a gently curved profile to optimize response. A specially shaped dust cap is attached to the cone body and voice coil former to improve high frequency response.
  
• Suspension design: The moving assembly is suspended and dampened by a large diameter linear profile spider made of Nomex® /polycotton blend and a positive roller rubber surround. Both together ensure optimal damping without prematurely limiting the excellent deflection of the C7-650cw.
  
• Motor Design: The C7-650cw features a high-density magnetic circuit with a high-quality Y35 Strontium Ferrite magnet and a specially machined T-Yoke motor topology. The motor magnets have been precisely optimized using advanced FEA tools to reduce distortion and ensure linear motor force across the driver's entire power range.
  
• It uses a 32 mm (1.27 inch) diameter voice coil wound with copper wire on a fiberglass voice coil former. The oversized voice coil provides extended power handling and minimizes thermal compression and distortion at higher listening levels.
• Chassis Construction: A specially designed cast alloy basket is used, which features thin spokes to maximize the rear open area and JL's patented "Elevated Frame Cooling Technology".
• 48 dB/octave filter: 50 Hz - 5 kHz
  
• 24 dB/octave filter: 60 Hz - 5 kHz
  
• 12 dB/octave filter: 70 Hz - 5 kHz
  
• Built in the USA 
  
• Available individually, with a cast alloy mesh insert, a fine mesh steel mesh insert and a spiral steel mesh insert.
  
• The performance of each C7 driver is tested and verified, then assigned a unique serial number. Register your C7 speaker online to receive a copy of its specific acoustic test report.

• Continuous power handling (RMS): 125 W
  
• Recommended amplifier power (RMS): 50 - 175 W / Ch.
  
• Nominal impedance: 4 Ω
  
• Frequency response: 50 Hz - 5 KHz ± 3 dB

• Resistance of the voice coil (Re): 3.114 Ω
  
• Free-air resonance (Fs): 54.5 Hz
  
• Reference efficiency: 0.304%
  
• Efficiency: 87.0 dB @ 1W / 1m
  
• efficiency  : 93.0 dB at 1W / 0.5m
  
• Sensitivity: 90.0 dB at 2.83V / 1m
  
• Electrical "Q" (Qes) : 0.669
  
• Mechanical "Q" (Qms): 6.265
  
• Total quality "Q" (Qts) : 0.605
  
• Equivalent volume (Vas): 0.461 cu. ft. (13.05 liters)
  
• Moving mass (Mms): 17,679 g
  
• Mechanical compliance of the suspension (Cms) : 0.000482 m/N
  
• Magnetic Strength (BL) : 5.31 N/A
  
• Effective membrane area (Sd) : 21.4 square inches (0.013807 square meters)
  
• Simple linear deflection (Xmax): 5 mm