DALI Alteco C-1

The DALI ALTECO C-1 is truly a multi-purpose speaker. The perfect fit for adding height information to a surround setup or taking the role as an out-of-the-way stereo speaker. By designing the crossover for stereo use and by keeping a strict focus on DALI sound design principles, we have created a speaker that delivers believable height information from Atmos, DTS-X and Auro-3D movies.

PRODUCT DETAILS The DALI ALTECO C-1 is truly a multipurpose speaker in both design and function. DALI wanted to ensure that the ALTECO C-1 is usable as both a height speaker as well as a traditional stereo speaker. By designing the crossover for stereo use and by keeping a strict focus on DALI sound design principles, we have created a speaker that fulfills both criteria. It is the perfect fit for adding height information to a surround setup or taking the role as an out-of-the-way stereo speaker.

The ALTECO C-1 delivers believable height information from Atmos, DTS-X and Auro-3D movies in surround setup - not only when “ firing up” using the ceiling as a reflector, but also “ firing down” from a position up under the ceiling.

The ALTECO C-1 is able to achieve this even without special equalizing in order to enhance the effects from HRTF (Head Related Transfer Function) technology. A technology found in Atmos certified speakers. Instead the ALTECO C-1 relies only on the height processing done in the amplifier, when selected. Had we included non-linear HRTF equalizing in the ALTECO C1, it would have been impossible to use it as a versatile neutral speaker, limiting the use to only an up-firing type speaker.

Designed the way it is the DALI ALTECO C-1 offers the best from several worlds giving you ultimate flexibility and multiple applications.

DRIVERS Build around a 4½ ” low loss wood fibre woofer and a 21mm ultra-light soft dome tweeter, the ALTECO C-1 brings all of the DALI sound principles to your living room in a unique new design.


The wood fibre cones are a DALI trademark, as well as a proven DALI technology. The ALTECO C-1 cone membrane is crafted from a mix of fine grained paper and wood fibre pulp. This makes the cones very ridged, very light weight and the unevenness in the structure of the membrane helps minimize unwanted surface resonances.

POSITIONING The angled front and the dual sound modes enable the ALTECO C-1 to be used in a multitude of speaker positions.

Add height information in any surround setup by either placing the ALTECO C-1 on top of the front or the rear speakers. It can also take the place of traditional front speakers placed high on the wall or horizontal on the side wall. It even offers the perfect angle for close listening in a desktop setting.

Using the switch placed on the front of the speaker to select the down-firing sound mode, the ALTECO C-1 can be used as a rear or surround speaker placed on the wall close to the listening position. This is possible because the down-firing sound mode lowers the direction of the sound downwards by 25 degrees.

Frequency Range (+/-3 dB) [Hz] 74 - 25,000 Hz

Sensitivity (2,83 V/1 m) [dB] 83.0 dB

Nominal Impedance [ohms] 6 ohms

Maximum SPL [dB] 103 dB

Recommended Amplifier Power [W] 40 - 100 Watt

Crossover Frequency [Hz] 2,100 Hz Crossover Principle 2-way High frequency driver, Quantity 1 x 21 mm High frequency driver, Diaphragm type Soft Textile Dome Low frequency driver, Quantity 1 x 4.5" Low frequency driver, Diaphragm type Wood Fibre Cone Enclosure type Closed Box Connection Input Single Wire (Spring loaded push button) Recommended Placement On-Wall On speaker

Recommended Distance From Wall [cm] 1 - 100 cm

Dimensions (HxWxD) [mm] 265 x 160 x 200 

Weight [kg] 2.9 kg


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