| 摘要 |
An electro-acoustic drive unit including at least a first and a second drive unit, each provided with a pole gap for exciting respective voice coil assemblies, at least one permanent magnet means is arranged to be a part of the magnetic circuit of both the first and the second drive unit. The pole gaps are arranged to provide magnetic fields directed radially with respect to a center axis of the loudspeaker, and the permanent magnet means has radially extending magnetization direction with respect to the center axis of the loudspeaker.
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