The Digitrax SP53188B is the big one - a 53 x 18 x 14mm 8 ohm speaker in a sealed enclosure, with roughly four times the cone area of a compact box speaker. Where there is room for it, in an HO long hood, a large tender, or anything O and G scale, it is the difference between a locomotive you can hear and one you can feel.
Looking for more DCC sound gear? Browse our DCC Speakers, DCC Decoders, and DCC Accessories.
Will this fit in an HO locomotive?
In a diesel long hood or a decent-sized steam tender, usually yes - it needs about 2-1/8 in. of length, 3/4 in. of width and 9/16 in. of depth. In a short switcher or a boiler, it will not. Measure before ordering, or step down to the SP26158B.
Is it really that much louder than a compact speaker?
Yes. Cone area and enclosure volume are what produce bass and output, and this has far more of both. It is the single biggest upgrade you can make to a sound install that has room for it.
Do I need 8 ohm or 32 ohm?
Check your decoder manual. Most DCC sound decoders drive 8 ohms, which is this speaker. If yours specifies 32 ohms, order the Digitrax SP531832B - the same speaker and box in a 32 ohm version.
Does it come with a plug?
No, it has bare interface wires for soldering to the decoder. If you need a plug-in speaker, the Digitrax SP26158BC has a 2-pin plug, though it is the smaller box.
