Soundtraxx 8-Ohm Speakers — Oval – 1.10 x 1.57″ 2.8 x 4cm – 678-810078

Great sound for your train if you can fit this one in your model!

Dimensions: 40 x 28.5 x 11.3mm(D)
Frequency Response: 250Hz – 20kHz
Power: 1 Watt (Nominal) 2 Watts (Peak)
Impedance: 8 Ohms