These speakers are small yet produce a big, bassy sound, making them ideal for DCC sound. These are 4 ohms and have been extensively tested with loksound 4, 5 and Zimo decoders. They are an ideal choice if you want great sound without dismantling or cutting down your model. These speakers have been modified for model use by trimming them to reduce the size, sealing all the holes and insulating them to avoid shorts, they simply connect with 2 wires like any other speaker. They measure only 25x25x7mm
Please see my other items where I have several other types of speaker available. I offer a fitting service for anyone nervous about fitting speakers themselves.