JL Audio C7-100CT

JL Audio's Chief Engineer and CEO, Lucio Proni, set the bar at the highest level, with a clear mission to create our finest-ever automotive component speakers. C7 World PremiereUnder his direction, engineering resources were assigned to develop each C7 speaker as a clean-sheet design, optimized for car audio applications.

C7 design solutions were created and refined using JL AUDIO's powerful mechanical and Finite Element Analysis (FEA) modeling systems, including our proprietary Dynamic Motor Analysis (DMA) software. These studies led to innovative motor and suspension solutions, which were key to meeting the C7 design goals for smooth, off-axis response, dynamic stability and low distortion.

No detail, material or design element went unexamined in each of the C7 speakers: from the exotic, corundum ceramic-coated diaphragm of the C7 tweeter, to the intricately machined motor plates of the C7 midrange, which significantly improve linearity. Even seemingly small details were engineered with a great deal of thought-like the way the C7-350cm's specially engineered lead wires attach to the rear suspension to prevent noise, without damaging the spider material's integrity. The C7-650cw woofer's dust cap went through ten prototype generations before arriving at the solution that resulted in the smoothest high frequency response and the best mechanical integrity. These details, and hundreds of others like them, simply had to be perfect for the design team to approve them for the C7 drivers.

We expect that C7 system designers will seek to avoid technical compromises, so we have designed C7 for use with active crossovers. A high-quality DSP, such as the JL Audio TwK™ 88/ D8, with individual amplifier channels for each C7 are the recommended architecture for peak performance. With this approach, the system designer can use delay, crossover parameters and precise equalization to adjust for speaker placement, cabin acoustics and target response.

This leads to a spectacular musical presentation, easily exceeding the performance boundaries of typical, high-end, car audio speaker systems. When you listen to C7, you will hear a level of resolution, precision and imaging that suspends disbelief, opening a window to an intensely pure audio experience.

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 24 dB/octave filters: 4,000 Hz - 30,000 Hz

Frekvensområde: 3.000 Hz - 30.000 Hz

Monteringsdybde: 0-19 mm