Stentorian Concentric Duplex 10"

• alternative name: Whiteley Electrical Radio Co. Ltd.; Mansfield

This twin " quality " reproducer, incorporating two independent speakers, is the latest application of the now well-known 'Series gap' magnet system, originated by W.B. engineers.

The centre pole is hollow and forms the beginning of the pressure horn which loads the convex high-frequency diaphragm at the rear. In front, this pole piece is surrounded by a separate gap, in which the low-frequency speech coil operates. The speaker should not be confused with the double-cone type.

There is no cross modulation, and the range very evenly covered (especially if a cross-over network is used) is from 50 to 14,000 c.p.s.

Although suitable for outputs up to 6 watts only, this small speaker is nevertheless a high-fidelity reproducer in the best sense of the word

Specification

• Series Gap Magnet of Alcomax 3.
• Cone: 10" diameter.
• Flux in L.F. gap, 12,000 gauss on I" pole.
• Flux in H.F. gap, 13,000 gauss on I" pole.
• Power handling capacity (both component speakers) 6 watts. Chassis material pressure die-cast from Mazak 3, non-magnetic and non-resonant alloy.

Also available as a 12" version.

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Elenco delle radio e altri apparecchi della Whiteley Electrical Radio, Boneham & Co. Ltd. (WB, Stentorian); Mansfield