Description

DALI SUB E-12 F

The SUB E-12 F is the ideal low-frequency partner for entry-level loudspeaker combinations such as the SPEKTOR, OBERON or OPTICON series. It expands the frequency spectrum of your home cinema or stereo system in an audible and perceptible way with an extremely deep bass foundation and ensures dynamic, well-controlled bass reproduction.

The 300 millimeter membrane of the woofer consists of pure aluminum and is therefore not only extremely rigid, but also looks very stylish. It is powered by a Class D power amplifier with 170 W sinus power and an extremely linear frequency response. An integrated limiter also protects the subwoofer from overload. The heavy-duty magnet system with a massive four-layer, long-throw voice coil ensures that the SUB E-12 F can always follow the audio signal coming from the amplifier perfectly.

Volume, phase and upper crossover frequency can be adjusted on the rear of the SUB E-12 F, and an automatic on/off switch ensures that the amplifier always switches on immediately as soon as an audio signal is present.

Thanks to the downward bass reflex opening, the comparatively compact subwoofer can also be set up directly in front of a wall without any problems. And since the front cover is held in place by invisible magnets, it can be easily removed to change the previously discreet and elegant appearance of the subwoofer with the aluminum membrane that is then visible to a technically extravagant one.

DIGITAL AMPLIFIER

The Class D amplifier integrated in the SUB E-12F mobilizes an RMS sinus power of 170 watts and was specially designed for this subwoofer with regard to particularly linear and low-distortion reproduction. It achieves a peak output of 220 watts - an important prerequisite for the most faithful possible implementation of bass impulses contained in film soundtracks and music recordings.

The power required for this is provided by a large-scale switched-mode power supply. This is also responsible for the fact that the subwoofer has an extremely low power consumption of only 0,4 watts in stand-by mode. While much of the power generated by conventional analogue amplifiers is lost in the form of heat, the SUB E-12 F's digital amplifier has an impressive 70% efficiency. Despite their high performance, the power amplifier and switched-mode power supply only generate an absolute minimum of heat loss, which is why the subwoofer does not require any external heat sinks.

To ensure that the SUB E-12 F sounds optimal under all circumstances, we have integrated a limiter in the amplifier section. This works in two ways: It compares the amplitude of the input signal with the potential output signal and the available supply voltage of the power supply with the expected output signal. If one of these comparisons shows a problem, the limiter gently reduces the signal level without any noticeable loss in impulse response.

Since the DALI SUB E-12 F is equipped with controls for the volume level and the cut-off frequency (40 - 120 Hz) as well as a phase reversal switch, it can be perfectly adapted to most front speakers and room acoustics. Both line and LFE cinch connections are available for connection to the preamplifier or receiver.

WOOFER

The 300 mm membrane of the SUB E-12 F is made of aluminium. As this material is very stiff yet light at the same time, it offers excellent transient response - not normally expected from a subwoofer in this price range. True to the DALI philosophy of particularly lifelike reproduction, the swing-in and swing-out behavior is also very good, which enables optimal interaction with the front speakers.

Instead of integrating a separate dust cap in the center of the diaphragm, the diaphragm is made of one piece, which makes its oscillating movement more close to that of a piston. The result: Distortions are reduced to an absolute minimum, especially in the lowest frequency ranges that the subwoofer is supposed to reproduce.

The woofer's drive works with a large ferrite magnet, which provides a strong magnetic field within the voice coil area. As a result, the frequency response of the SUB E-12 F reaches down to 28 Hertz, and even in the lowest registers, an extremely detailed reproduction in connection with a high sound pressure level is guaranteed.

In the interest of the lowest possible signal loss, an extremely flexible surround is used, which allows large and linear deflections. The generously dimensioned suspension is designed in such a way that both weak and strong audio streams are converted into acoustic signals without distortion.

CASING

Even after more than 30 years of experience in the field of acoustics and housing development, DALI continues to trust in the excellent acoustic properties of housings made of medium-density fiberboard (MDF). The housing of the SUB E-12 F is optionally available in matt black or matt white. The baffle is also designed in a matching color with a matt surface.

Any risk of flow noise through the down-firing port is reduced by its convex, tapered design. Apart from its shape, the dimensions and the arrangement of the reflex channel have been measured and optimized in extensive tests so that there is no interaction between the housing and the woofer.

The entire case is decoupled from the floor with an elegant aluminum base. It almost seems as if the subwoofer is floating above the ground - the 30 mm distance between the housing and the ground is not only for the optics, it also eliminates possible turbulence caused by the bass reflex opening radiating downwards.

The front cover is held in place by invisible magnets, so that the subwoofer retains an elegant appearance without any annoying indentations for the usual fastening nipples when it is operated without a cover.

Additional information