25x25x7mm Small Megabass DCC Sound Speaker (4 ohm)
Very versatile speaker with great lots of bass. Ideal for most locos where space is an issue. It will fit under the fans in most Bachmann diesels and will also fit in most Hornby, Heljan and Vitrains models. 4 Ohms works with Zimo and Loksound 4 or 5.