This speaker is great for boosting the low frequencies in most diesel and “big” steam sounds.Dimensions: 27 x 14.3mm(D)Frequency Response: 350 Hz – 20kHzPeak Power: 2 WattsImpedance: 8 Ohms.
Sounds great in both of my Precision Craft PRR I1 steam locomotives. Used two of these speakers in each locomotive. Both locomotives were DC converted to DCC.