SoundTraxx 27mm Round Mega Bass Speaker
 
This speaker is great for boosting the low frequencies in most diesel and “big” steam sounds.
 
Dimensions: 27 x 14.3mm(D)
Frequency Response: 350Hz - 20kHz
Power: 1 Watt (Nominal) 2 Watts (Peak)
Impedance: 8 Ohms
 
MSRP; $12.95