DALI ALTECO WHITEPAPER
INTRODUCTION DALI ALTECO C-1 is truly a ‘Jack of all trades’, but also master to all. The wedge shaped ALTECO C-1 is a perfect fit for several difficult audio situations, and the dual sound modes helps it adjust to even more. DALI ALTECO DALI A/S www.dali-speakers.
HEIGHT SPEAKERS Movies with a Dolby Atmos, DTS:X or Auro-3D sound track are becoming more and more the standard. To enjoy the extra elevated audio information extra speakers in or around the ceiling are required. The ALTECO C-1 offers the user two options to deliver the height information in a surround setup. Either: • Placed on top of the front speakers, and/or the rear speakers, firing up onto the ceiling, they generate the elevated sound stage by reflecting the audio off the ceiling area.
STEREO SPEAKERS Wanting to maximize the possible user scenarios for the ALTECO C-1, the voicing of the speaker was done according to DALI’s sound principles. This means that they are perfect for use as stereo speakers as well as in surround setups. • Mounted at about 2/3 from the floor the ALTECO C-1 is angled down directly at the listening position, letting the sound reach the listener at about ear height for the best possible audio experience.
SURROUND SPEAKERS The dual sound modes of the ALTECO C-1 allows the listener to be placed very close to the speaker. When used this way the ALTECO C-1 can be used for close proximity listening when mounted on a wall. • Mounted about 2/3 up from the floor on the back wall, the ALTECO C-1 can deliver rear or back channel information in a surround setup.
DUAL SOUND MODES The position switch placed on the front baffle of the ALTECO C-1 enables the user to change the angle of the audio information generated by the speaker. • In the ‘Up’ position, the audio signal is optimised for listening at a position reached in a line perpendicular to the front of the speaker. This setting is used when the sound must travel to a point the speaker is aimed at, or if reflected off the ceiling when generating height information.
DUAL SOUND MODES The different sound modes are obtained by regulating the phase of the tweeter. Regulating the phase of the tweeter dictates the position where the combined audio signal from the woofer and the tweeter is optimal. In the Up position, the audio signal from the woofer and the tweeter is combined like on a traditional stereo speaker, and is optimal along a line perpendicular to the front of the speaker.
FOAM PADDING The recessed front baffle on the ALTECO C-1 helps ensure that audio is delivered more precisely towards the listening position. Having the woofers recessed in this way does carry the risk of unwanted sound reflections from the sides of the speaker, there by acting as a sound trap. the sound before it reflects of the sides and thereby eliminates the risk of a sound trap. The padding also helps guide the sound forward, and reduces the leakage of sound from when used as an up-firing speaker.
DRIVERS Tweeter The ALTECO C-1 tweeter is based on an ultra-light weight weaved fabric. Compared to most soft dome tweeters in the market, the ALTECO C-1 dome material is less than half the weight; 0.056 mg per mm2. The beauty of the soft dome tweeter is its impressive ability to play even the lowest parts of the high frequency range without any break-ups. This is crucial when handling the all important hand-over from the woofer to the tweeter.
