13×18×4.5 mm speaker 4 ohms - ESU 50353

The ESU 50353 is a miniature sound component in the 13 × 18 × 4.5 mm format. Of the “Sugar Cube” type, it is intended to equip sound-fitted railway scale models that have a compact location for the speaker. Its impedance is 4 ohms.

With a diaphragm surface area larger than the previous ESU speaker model in this family, this unit is designed to deliver a higher sound level. It aims for an extended reproduction of bass, midrange and treble, while keeping overall dimensions compact. It is a suitable solution when larger bass-reflex speakers cannot fit in the model’s chassis or body.

In digital railway modelling, the speaker converts the sound signal sent by a decoder into audible sound effects: start-up, running noises, warning tones, announcements, or ambient sounds depending on the model’s programming. Sound quality depends in particular on the acoustic installation. A properly sealed acoustic chamber is essential: it channels the sound wave produced at the rear of the diaphragm and helps achieve a clearer reproduction, especially in the low-frequency range.

The ESU 50353 reference is supplied with four acoustic chambers of different heights. Once the speaker is installed in a sealed manner, the total height of the assembly can be 7.5 mm, 9.5 mm, 12.5 mm or 17.5 mm. This modularity makes it easier to integrate into locomotives, multiple units, passenger coaches, or sound-equipped wagons by selecting the chamber height compatible with the available internal volume.

This miniature speaker is for modellers looking for a compact sound installation without giving up a suitably sized acoustic chamber. Choosing the chamber height allows you to match the overall footprint to the vehicle being modelled, while the 13 × 18 mm format provides a substantial diaphragm area for this category of speakers.

Technical features

• Brand: ESU
• Reference: 50353
• Type: miniature “Sugar Cube” speaker
• Speaker dimensions: 13 × 18 × 4.5 mm
• Impedance: 4 ohms
• Acoustic chambers included: 4
• Total possible heights with chamber mounted: 7.5 mm, 9.5 mm, 12.5 mm or 17.5 mm