JL Audio C7-100CT - 25mm Compo-Hochtöner

C7-100ct
1-inch (25 mm) Corundum Ceramic-Coated, Aluminum Dome Component Tweeter

• C7 is the pinnacle of JL Audio automotive loudspeaker design, benefiting from our most advanced development tools and a complete commitment to precision manufacturing.
• The C7-100ct component tweeter is designed to deliver unparalleled high-frequency performance. Utilizing a corundum ceramic-coated aluminum alloy diaphragm suspended via a treated silk, s-roll surround, it provides spectacularly detailed reproduction of treble frequencies with outstanding off-axis response. Distortion and non-linearities have been minimized through critical optimization of dynamic motor and suspension behaviors.
• Passive crossover networks are not included with 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, and a dedicated amplifier channel for each C7 loudspeaker in the system. Precise setup of equalization, delay and crossover filters will ensure optimal in-vehicle performance.
• C7-100ct Design Notes:
• Dome Diaphragm: Corundum ceramic coated aluminum alloy diaphragm exhibits high stiffness, very low mass and excellent environmental stability. It also helps the tweeter dome to hold its shape and operate as a true piston at higher frequencies, without a penalty in moving mass.
• Suspension Design: The diaphragm's motion is centered, sprung and damped by a treated silk, s-roll surround. Ferrofluid in the magnetic gap acts as a rear suspension element in this design. The two combine to provide optimum damping without unduly restricting excursion.
• Motor Design: The C7-100ct employs a high-density magnetic circuit with a neodymium magnet and U-Yoke motor topology. An under-hung voice coil is employed, wound with copper-clad aluminum wire onto an aluminum voice coil former. Motor magnetics have been precisely optimized utilizing advanced FEA tools to lower even order distortion and IMD/AMD.
• Acoustical Design: The shape of the tweeter housing is designed to boost sensitivity in a very specific bandwidth, helping to flatten the frequency response. It also provides improved control of directivity.
• Design Bandwidth:
• With 48 dB/octave filters: 3,000 Hz - 30,000 Hz
• With 24 dB/octave filters: 4,000 Hz - 30,000 Hz
• With 12 dB/octave filters: 5,000 Hz - 30,000 Hz
• Sold individually, with flush and surface mounting fixtures and hardware. One 15μF tweeter protection capacitor is also included.
• The performance of every C7 driver is tested and verified, then assigned a unique serial number. Register your C7 loudspeaker online to receive a copy of its specific Acoustical Test Report.
• https://c7.jlaudio.com/index.aspx

General Specifications

• Continuous Power Handling (RMS): 100 W
• Peak Music Power: 200 W
• Recommended Amplifier Power (RMS): 50 - 150 W / Ch.
• Nominal Impedance: 4 ohms
• Frequency Response: 3 kHz - 30 KHz ± 3 dB

Parameters

• Voice Coil Resistance (Re): 3.20 ohms
• Free Air Resonance (Fs): 1450 Hz
• Reference Efficiency (no): 0.267%
• Efficiency: 86.5 dB at 1W / 1m
•                  92.5 dB at 1W / 0.5m
• Sensitivity: 89.5 dB at 2.83V / 1m

Tweeter Physical Specifications (Pict. 4)

• Flush Mount Fixture Diameter (A1): 2.13 in / 54 mm
• Surface Mount Fixture Diameter (A2): 2.16 in / 55 mm
• Flush Mount Mounting Hole Diameter (B): 1.88 in / 48 mm
• Flush Mount Mounting Depth (C): 0.73 in / 19 mm
• Flush Mount Tweeter Frontal Protrusion (D1): 0.33 in / 8 mm
• Surface Mount Tweeter Frontal Protrusion (D2): 1.06 in / 27 mm