Whitepaper

WOOFER
DALI SUB C-8 D is equipped with an 8” down-firing
woofer. The cone is constructed from a high-quality
paper pulp resulting in a rigid cone with excellent
breakup characteristics while at the same time being
very lightweight and agile.
The engine of the woofer is built around an ‘oversized’
ferrite magnet and optimized for maximum flux within
the voice coil gap. The reason is that it was crucial for
the project team to reach a high B/L product to enable
the SUB C-8 D to render the finer low frequency details
of music, also at a higher sound pressure level. The
measured B/L value of 14 N/Ampere is a good indication
of the level of control and precision that was reached,
and rarely to be found in this category at all. And the
numerous listening sessions has truly convinced us that
this was the right way to go.
The voice coil is 26.5 mm long and built for long
excursions. It is vented to ensure air-cooling to the
system, and the coil itself. Venting this 4-layer voice coil
keeps the temperature down, and the benefit is a stable
impedance response.
Also, the pole piece is vented for maximum cooling. Here
the venting has another purpose too; it reduces internal
compression in the motor system. This ensures free
movement of the cone without any over/under pressure
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.
DALI A/S www.dali-speakers.comDALI SUB C-8 D