The SUB K-14 F incorporates a 14” woofer with a deep black coloured aluminium cone. Chosen for its stiff, yet lightweight properties, the aluminium cone ensures a greater transient response than you would normally expect from a subwoofer in this category. Very much in line with DALI’s philosophy in building speakers, the ability to start and stop very quickly enables easy integration with the front speakers.
Designed to be a closed cone you will find no dust cap. Instead it is an integrated part of the cone itself. This is also a contributing factor in ensuring a piston-like behaviour. Consequently, distortion is kept to an absolute minimum – especially in the low frequency area which is where the subwoofer operates.
The motor of the woofer is built around an ‘oversized’ ferrite magnet, and optimised for maximum flux within the voice coil gap. This carefully designed magnet system enabled the project team to reach a high B/L product to enable the SUB K-14 F to render the finer low frequency details of music, but also at a higher sound pressure level. The measured BxL value of 17 N/A is a good indication of the level of control and precision that was reached, and rarely to be found in this category at all. Numerous listening sessions has truly convinced us that this was indeed the right way to go.
The 30 mm long, 4 layer voice coil is built for long excursions. It is vented to ensure air cooling to the system and to the coil itself, keeping the temperature down, which creates a stable bass response.
Also, the pole piece is vented for maximum cooling. The venting here has another purpose though; it reduces internal compression in the motor system, which ensures free movement of the cone without any over-/underpressure affecting the performance.
Adhering to the low-loss sound design principle, the surround of the woofer is built to allow long and linear excursion. The oversized suspension is designed to allow both weak and strong transients to turn into undistorted acoustic signals.