JL Audio C7-650CW

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

Features

• 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 total commitment to precision manufacturing.
  
• The C7-650cw component woofer can be used in a 3-way system with a midrange and a tweeter or with just a tweeter in a 2-way configuration. Designed from the ground up, it has exceptional linear excursion and excellent linearity, resulting in a solid midrange driver and pure, accurate midrange performance. Distortion and non-linearities 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 Construction notes:
  
• Cone and dust cap: Vacuum-molded, mineral-filled polypropylene material offers excellent damping and low mass. The cone body has a gently curved profile to optimize response. A specially shaped dust cap is fitted to the cone body and voice coil former to improve high frequency response.
  
• Suspension construction: The moving assembly is suspended and damped via a large diameter linear profile centering spider molded from a Nomex®/poly cotton blend and a positive roller rubber surround. Both together ensure optimum damping without prematurely restricting the excellent excursion 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 entire power range of the driver.
  
• 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, featuring thin spokes to maximize 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 grid insert, a fine-mesh steel grid insert and a spiral steel grid insert.
  
• The performance of each C7 driver is tested and verified and then given a unique serial number. Register your C7 speaker online to receive a copy of its specific acoustic test report.

General specifications

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

Dimensions

• Outer frame diameter (A) : 6.50 inch / 165 mm
  
• Bolt circle diameter (B) : 155 mm / 6.12 inch
  
• Diameter of the mounting hole (C) : 141 mm / 5.56 inches
  
• Outer diameter of the grill tray (D) : 183 mm (7.20 inches)
  
• Frontal grille projection (E) : 0.98 in / 25 mm
  
• Installation depth (F) : 2.77 inch / 70 mm
  
• Motor outer diameter (G): 100 mm / 3.94 inches

Parameters

• 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)
  
• Mass in motion (Mms) : 17,679 g
  
• Mechanical compliance of the suspension (Cms) : 0.000482 m/N
  
• Magnetic strength (BL) : 5.31 N/A
  
• Effective diaphragm area (Sd) : 21.4 square inches. (0.013807 square meters)
  
• Simple linear deflection (Xmax) : 5 mm