Dali Sub C-8 D Subwoofer
This 170W RMS Subwoofer incorporates a Class D amplifier and an 8" downfiring woofer to acheive high fidelity audio in a surround or compact stereo setup for movies or music.
Dali Sub C-8 D renders a performance, which is true to the input signal. It's a Subwoofer with its heart set on high fidelity. It feels equally at home in a surround setup destined for movies, as it does in a compact stereo setup meant primarily for musical enjoyment. This versatile subwoofer is everything but a ‘boombox’.
Adhering to Dali’s low-loss sound design principle, the surround of the 8” down-firing woofer is built to allow long and linear excursion. The integrated 170 Watt RMS Class D amplifier enables the Dali Sub C-8 D to follow and render the required signal with an absolute minimum of bias.
Dali Sub C-8 D
Unlike some Subwoofers, the Dali Sub C-8 D has been engineered to perform equally well on both music and movies. It is very important to us that a Subwoofer can render a performance true to the input signal. Though featuring an 8” down-firing woofer, the Sub C-8 D is everything but a ‘boombox’.
All the amplifiers in the Dali Subwoofers have the stamina to keep a high-yield performance and the headroom to draw out that little extra when needed. The integrated 170 Watt RMS Class D amplifier is a highly linear construction. The Dali Sub C-8 D will follow and render the required signal with an absolute minimum of bias. Designed not only for continuous power but also for peak performances, the Sub C-8 D is able to deliver 220 Watt Peak Power. This is very relevant when it comes to both movie and music signals.
To improve sound reproduction and to ensure performance under difficult circumstances, a limiter has been incorporated in the amplifier section. The integrated limiter works in two areas: It compares the input signal amplitude to the potential output signal level, and it compares the available supply voltage from the power supply to the expected output signal. If any of these comparisons show a potential problem, the limiter will cut the signal in a soft manner and without affecting peak power.
Fitted with controls for gain, cut-off frequency, and phase, the Dali Sub C-8 D will adapt to any front speaker and room acoustics. And with a choice of LFE and LINE inputs it can be connected to almost any amplifier, receiver or processor. The switch mode power supply is part of the reason for very low power consumption - only 0.4W in standby mode. And the amplifier displays an impressive efficiency of 70%. In unison, the high-efficiency amplifier section and power supply construction generate an absolute minimum of heat loss. For that reason, you will find no external heat sink on the Sub C-8 D.
Dali Sub C-8 D is equipped with an 8” down-firing woofer. The cone is constructed from high-quality paper pulp resulting in a rigid cone with excellent breakup characteristics while at the same time being very lightweight and agile. The woofer engine is built around an ‘over-sized’ ferrite magnet and optimised for maximum flux within the voice coil gap.
It was crucial for our project team to enable the Sub C-8 D to render the finer low-frequency details in music - also at high sound pressure levels. The measured values indicate that we reached a level of control and precision that is 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 benefit is a stable impedance response. The pole piece is likewise vented for maximum cooling, and here the venting also 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 over-sized suspension is designed to allow both weak and strong transients to turn into undistorted acoustic signals.
All Dali Subwoofers are compatible with almost any amplifier, receiver or processor due to the choice of LFE or LINE inputs. The elegant and simple cabinet is designed to fit perfectly to the size of the woofer, but without forgoing the inner volume that is needed to produce a powerful bass performance.
The solid MDF cabinet is designed and manufactured to meet the tough Dali specifications. The enclosure comes in a choice of Black Ash or White finish, making it blend in perfectly with most speaker designs and room decors. The rigid cone structure based on either aluminium or cone fibre eliminates the need for a dust-cap and helps ensure a piston-like behaviour of the woofer.
The entire cabinet is effectively decoupled from the floor by means of four polymer based oversized spikes. Appearing to hover above the floor the distance of 30 mm eliminates any potential turbulence from the space between the cabinet and the floor itself. Still, the proximity to the floor ensures that the benefit of having a down-firing Subwoofer is maintained; a higher efficiency and more freedom in positioning.