Tweeter

A dome speakers is a dynamic speaker whose membrane forms a spherical cap, so it is arched dome-shaped. Cone loudspeaker with dust cap does not fall under this category.

General

In contrast to cone loudspeakers, the voice coil is at the outer edge of the membrane, at the transition to the bead. One ( outward ) curvature convex diaphragm causes this compared to the cone angle wider at higher frequencies. However, this construction limited - not least for reasons of stability - the viable size; the formerly widely dome midrange are built today little more in this form.

Sometimes manufacturers also call ordinary means and woofer as space-filling when the membrane is " pulled " in one piece, so the center does not have a separate dust or phase plug. True dome speakers that can also radiate lower frequencies with serious volume, but are very rare ( such as - high-priced - converter of the company Accuton concave ceramic membrane).

Today the Kalottenbauweise is more suitable for tweeters used.

Dome tweeter

While earlier dome tweeter were common with nominal 20 mm Diameter at widest, are now mostly 25 - and used 28mm types. Thanks to the larger voice coil increases the thermal load; lower resonance frequencies also allow a deeper connection. However, Due to the principle is the extension of the diaphragm diameter at the expense of omnidirectional, ie the tweeter falls outside the listening axis more rapidly.

Short in the front panel integrated horn resolutions - also called " wave guides " - if necessary, increase the overall sound pressure; but they in turn constrict the beam angle and often limit the frequency response linearity. To improve the omnidirectional sometimes small dispersion cones are positioned centrally in front of the membrane.

Membrane materials

The membrane material usually coated fabric ( like silk ) is used. New manufacturing technologies, it is now also possible to take advantage of hard materials: they are characterized by very clear and detailed sound reproduction. On the market are some membranes made ​​of aluminum, ceramic, titanium, beryllium, and even diamond. To protect the touch-sensitive spherical caps corresponding tweeters often have a prefixed metal grille.

Special shapes

For speakers with " Inverskalotte " is the membrane. Not outward but inward (concave )

When the ball center ring radiator is fixed. This results in a design in which the sound is radiated quasi two concentric corrugations; literally so these are no longer a " dome " speaker.