6-1/2'' (160mm) 2-Way Competition Component Speaker SystemAt JBL, we've had more practice than any other speaker company at eliminating distortion, and it shows. GTi competition speaker systems include the lowest-distortion woofers we've ever built. In a loudspeaker, distortion can be produced by the cone, the motor, the suspension and even the movement of air through the speaker's assembly. In designing the 560GTi and 660GTi woofers, JBL engineers have left no stone unturned. The basket, polepiece and voice coil former all include vents to eliminate any potential distortion caused by the movement of air trapped within these parts. The ultrarigid Kevlar ® cone eliminates unwanted cone flexing (also called modal distortion), which can cause big peaks and dips in the midrange response. The spider and surround are designed to ensure linear forward and rearward motion, minimizing distortion caused by the speaker's suspension. The motor includes a copper polepiece cap and a flux stabilization ring that work together to produce a linear voice coil inductance that minimizes intermodulation distortion. Finally, an extra-long voice coil ensures that the coil remains in the magnetic gap to minimize distortion at low frequencies and their harmonics, and during high-output transients. The result is crystal-clear midrange, snappy mid-bass without any audible ringing or hang-over, and a smooth frequency response that needs no compensation circuitry in the crossover. Many speaker systems are designed for on-axis listening and often include a listening window that's ±30° from the speaker's 0° axis. That's great for home audio or other applications where speakers can be easily pointed at a single listener. In a car, however, the possible speaker mounting locations don't always allow for on-axis placement even for a single listener.
