Give it a lot of baffle: The case edges are far enough away so that the tweeter will not see you in the intended work area.There are very meaningful and simple approaches to tackle the topic of edge diffraction in tweeters: This concept was used in the construction proposal DXT-Mon ![]() The horizontal straightening comes very close to the theoretical ideal perceived by the author! to 3kHz which would be compensated only by a correspondingly high crossover frequency. In wider baffles there would be a widening in the transmission range, usually. The trapezoidal phases do the rest, especially in terms of stabilization of the bundling behavior towards the mid-bass driver. The size of a "normal" tweeter (D104mm), with the effect of a real waveguide. The same applies as in the previous example, but without the problem of the large driver gap. This concept finds application in very many, vA speakers developed under time, and or selling pressure □īaffle rectangular, narrow, tweeter centered, 15mm bevels on both sides The distance between the drivers must always be seen in relation to the crossover frequency. Furthermore, it becomes more and more unbalanced in the vertical direction as the crossover frequency increases. In the area of the crossover frequency, too little and too much energy is released into the room. The mid-bass driver already directs clearly in this area and is then "replaced" by the tweeter, which still works as a half-space radiator => The energy frequency response is unbalanced. In an area that is sensitive to the ear there is a depression (I like to call this "ear flatterer"), but nothing is missing energetically, as it is compensated at angles.Ī second approach would be to separate very high (in this case> 3,5kHz). In terms of tonality, that can sound very good. Usually such concepts are coordinated with a sink on the axis, which is then "filled up" again at angles. Space: The space suffers from the imbalance of axis and angular frequency responses Tonality: Imbalance under different listening positions. Regardless of how the driver filtered to the axis, the discrepancy between on-axis and off-axis frequency responses remains. ![]() In the simulation, the tweeter is linearized, => the dip on the axis has been compensated, which makes the peaks at angles more revealing accordingly. The result is an on-axis dip with a peak at angles. The tweeter "sees" the baffle edges in the intended working area. The simulations and measurements show the angles 0,30 & 60 ° horizontally.įirst, two installation situations without or with only minimal influence on the housing: The infinite baffle The first four examples are based on (reliable) simulations, assuming a tweeter linearized on the axis and separated at 2kHz. The influence of midrange speakers is usually less problematic and should not be considered here. In the following, the directional behavior of 25mm tweeters in different installation situations is examined. To train this view is the concern of this article. Those who value a loudspeaker not only by its tone, but also by a good stage presentation, should take a trained look at the baffle of the speaker in addition to reading impressive sound descriptions. The tweeter "sees" the baffle edges in the intended frequency range, where secondary sound sources are created. Imbalances between on-axis, and off-axis frequency responses very often result from an inappropriate baffle design including missplacement of the drivers. In addition to the frequency response on axis (0 °), a balanced and uniform directional behavior has a considerable, and in the author's perception sometimes (too) neglected, influence on the playback quality, also and especially in terms of spatial representation of the sound, of speakers. ![]() In particular, the attention is paid to the directional behavior, of the tweeter. It is to be examined how the design of the baffle and the arrangement of the drivers, affect the reproduction quality of loudspeakers.
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