Magnetar ribbon dipole speaker

Implementation.

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The line source dipole is implemented with a ribbon element with a shallow wave guide in front with a width of 22.4 cm. The ribbon is made of aluminum and is 2.8 cm wide, 94.5 cm high and 13 microns thick. The ribbon has a very low impedance. The weight is a bit is less than 1g, so it follows the changes in the signal extremely sensitively in the magnetic field. The impedance and voltage / current transformer is a high-end autoformer, which according to the law of energy loss does allow an easy load on the amplifier. The electromagnetic force in the ribbon does not depend on the voltage but only on the current. The neodymium magnets are hidden inside the shaped aluminum profile. The element is protected by a curved metal mesh on both sides against contact.

The bass became a U-frame dipole with a 15 ”dynamic element, which also serves as a stand for the ribbon element. A passive filter on the speaker is stacked on the bottom of the bass housing to keep the focus down. The linear motion deviation of a dynamic element is typically many times larger compared to planar membrane elements. Thus, the bass part can be kept compact. The electroacoustic division is 385 Hz and the low frequency is 35 Hz (-6dB). The room with its interfaces can extend the lower limit of bass reproduction, up to half an octave lower. Also, floor reflection does not interfere when the bass is close to the floor. The speaker has 4 adjustable foots that can be replaced with M8 spikes if needed. The element is protected by a round metal perforated plate. The back of the open housing is protected by a square wooden perforated plate.