Epos woofer - 10" inch (254mm), 4 Ohm (RRP £90)
https://www.ebay.com/itm/254284332985?ul_noapp=true 10" (254mm) steel chassis with reinforced paper cone and inverted dust cover.
3" (75mm) high temperature voice coil wound on an aluminium former with high power ceramic magnet system.
As used in our ELS SUB & M SUB. It has enough magnet strength and voice coil size to handle very high power levels for long periods without distress. Its cone diaphragm is very stiff to keep distortion and colouration to a minimium. The rubber suspension surround is smaller than normal and quite stiff, which also helps to reduce distortion and low frequency over-hang. In short, it has been designed to be more appropriate for a two-channel bass unit than a conventional sub-woofer.
We no longer have precise technical specs of this driver, but when it was incorporated into our subwoofers, we quoted a frequency response of 20Hz to 150Hz (with high & low filter settings at max & min).

Усилитель на дискретных элементах, выходные транзисторы японские SANKEN 2SA1492 / 2SC3856 напряжение: 180В, ток 15А;
VCBO (V) -180; VCEO (В) -180; ИК (А) -15; ПК (Вт): 130; HFE: мин 50;
Для организации оформления "закрытый ящик" фазоинверторы сабвуферов плотно закрыты заглушками из теннисных мячей.

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