Прочие устройства — Line Magnetic TA-4181-A

The Line Magnetic TA-4181-A is an 18-inch field-coil woofer, a modern reproduction of the Western Electric 4181 bass unit that is prized among vintage horn system builders and was made in very small numbers. Line Magnetic recreated it by analysing the materials of original units and engineering the replica with modern digital design tools.

Key specs that matter

The driver is rated for a frequency range of 20Hz to 7kHz, handles 25W and presents a 16 ohm load. It weighs about 20kg, reflecting the large frame and the electromagnet assembly that replaces a permanent magnet.

Engineering and use context

With a field coil in place of a magnet, the TA-4181-A only works when fed by an external exciter, for example one of the Line Magnetic PR series units. The 18-inch cone and low power rating suit large, efficient horn systems paired with modest tube power.

Alternatives

Line Magnetic also makes the TA-4151, a 13.3-inch field-coil woofer rated at 8 ohms and 40Hz to 7.5kHz.