This well known speaker is probably the best speaker out there for OO gauge DCC sound.
Bachmann SOUND OO Gauge Class 55 Deltic St Paddy BR Blue EM2 Speaker
27mm 4 Ohm Speaker For Heljan Class 26 27 33, For Loksound 4 Or 5 DCC Sound
Piko Sound Decoder/Speaker for Talent 21:160 Scale, N Gauge
Zimo MSTAPK2 Test And Connection Board With Speaker For Small Scale Decoders
DCC "Sugarcube" Sound speaker for Loksound and others
