CF-275mt

Custom-fit (CF) Speaker System: 2.75' (70 mm) Mid-Tweeter

Engineered to deliver amazing sound from factory locations, CF speakers are designed with shallow polymer frames and breakaway mounting tabs for maximum compatibility in today's most popular vehicles, including those from Chevrolet, GMC, Cadillac, Dodge, Jeep, RAM, Toyota and many more. 

CF drivers benefit from our proprietary FEA modeling and expertise in loudspeaker design. This knowledge is used to create speakers that can play loudly while maintaining a smooth, dynamic low-distortion sound. At the core of the CF-275mt mid-tweeter is a proprietary, 2.75' (70 mm) composite frame and a DMA-optimized motor system. An ultralight, fiber-reinforced pulp cone with a custom 'S' roll surround delivers excellent efficiency and extended high-frequency response. A flat, progressive-roll spider ensures linear compliance, while the neodymium motor packs astonishing energy from an ultracompact and lightweight package. Each speaker's glass-filled, high-temperature polymer frame is outfitted with insert-molded terminals and a low-profile perforated metal grille to easily fit behind factory trim while providing excellent UV protection in exposed dashboard locations.

For passive applications as midtreble speakers, in-line, second order high-pass filters are included to enhance smoothness and improve power handling. CF-275mt speakers can also be used actively, as true midrange or mid-tweeter drivers to create outstanding two-way or three-way systems. For active applications, we recommend a high-quality digital signal processor (DSP), such as the JL Audio TwK® DSP or a VXi amplifier with built-in DSP, and the recommended bandwidths below.

Design Bandwidth:
With 24 dB/octave filters: 400 Hz-20 kHz
With 12 dB/octave filters: 500 Hz-20 kHz

Enjoy factory-fit and next-level sound from OEM locations with CF speakers!

Speakers are sold as a pair and include built-in grilles.

Dynamic Motor Analysis - DMA Optimized Motor

Summary:
JL Audio's proprietary Dynamic Motor Analysis system is a powerful suite of FEA-based modeling systems, first developed by JL Audio in 1997 and refined over the years to scientifically address the issue of speaker motor linearity. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.

Detailed Information:
Since 1997, JL Audio has been at the forefront of Finite Element Analysis-based modeling of loudspeaker motors and suspensions. This research is aimed at decoding what we refer to as the 'Loudspeaker Genome'... a project aimed at understanding the true behavior of loudspeakers under power and in motion. A major component of this integrated system is DMA (Dynamic Motor Analysis). Starting with the 15W3 and the W7 Subwoofers in the late 1990's and early 2000's, DMA has played an important role in the design of all JL Audio woofers sold today, including our component woofers.

DMA is a Finite Element Analysis (FEA)-based system, meaning that it takes a large, complex problem, breaks it down into small solution elements for analysis and then assembles the data to form an accurate, 'big-picture' solution. DMA's breakthrough is that it actually considers the effects of power through the coil as well as coil/cone position within the framework of a time-domain analysis. This gives us a highly accurate model of a speaker's actual behavior under real power, something that the traditional Thiele-Small models or other low power measurements cannot do. Because DMA does not rely on a steady-state model, it is able to consider shifts in the circuit elements being analyzed. These modeling routines are intense, requiring hours to run for a whole speaker.

DMA is able to analyze the real effects of fluctuating power and excursion upon the magnetic circuit of the motor, specifically the dynamic variations of the 'fixed' magnetic field. This delivers intensely valuable information compared to traditional modeling, which assumes that the 'fixed' field produced in the air gap by the magnet and the motor plates is unchanging. DMA not only shows that this 'fixed' field changes in reaction to the magnetic field created by current flowing through the voice coil, but it helps our engineers arrive at motor solutions that minimize this instability. Analyzing this behavior is critical to understanding the distortion mechanisms of a speaker motor and sheds light on the aspects of motor design that determine truly linear behavior:

1. Linear motor force over the speaker's operational excursion range
2. Consistent motor force with both positive and negative current through the coil
3. Consistent motor force at varying applied power levels
    

Our ability to fully analyze these aspects of motor behavior allows our transducer engineers to make critical adjustments to motor designs that result in extremely linear, highly stable dynamic loudspeaker motor systems.

The payoff is reduced distortion, improved transient performance and stellar sound quality.

 

USA Limited Warranty:  One (1) year from the original date of purchaseWarranty Details

 

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