Speaker square with build in Martinshorn sound and amplifier

Rectangular loudspeaker with sound box, build in K1 sound chip (Martinshorn: tati-tatuu) and amplifier.

This speaker can be used with DCxx-SI and DCxx-I decoders.

Dimensions speaker (L x W x D): 15 x 11 x 4mm

Dimensions sound box (L x W x D): 15 x 11 x 8mm

Connections: 

Black PVC: Power minus

Red enamel wire: Power plus (3,5 - 5V)

Green enamel wire: Control sound ON/OFF

Red PVC: Speaker +

The volume can be reduced by adding a series resistor to the Speaker + wire (red PVC).

When the green wire goes low (GND) the sound is output.