This loudspeaker module is suitable for large tenders with gauge H0 or OO or models with gauge 0. Its built-in passive radiator, in conjunction with the built-in broadband speaker, results in good bass reproduction without neglecting the highs and mids. Especially for diesel or steam locomotives, this module is a real alternative for those who like deep bass but don't need extreme volume. The speaker fits perfectly with our LokSound 5 or LokSound 5 L decoders.