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Makrofon YMF125/130


  • Frequency: 130 Hz
  • Intensity in 1/3 octave band level @ 1m: 138 db(A)
  • Intensity @ 1m: 139 db(A)
  • Ship Class: II
  • Power Source: Compressed Air
  • Audibility Range: 1.5 NM
  • System Voltage: Corrosion and seawater resistant, including brass casing and aluminum horn
  • Air Pressure: 7-40 bar
  • Air Consumption: 20-30 l/sec
  • Material: Brass casing, aluminum sheet for horn; offers best non-corrosive, seawater resistant materials
  • Dimensions (L X W): 1090 x 428 mm
  • Weight: 30 kg


  • Diaphragm sound transmitter
  • Signal released by an electro-magnet or manually using a hand pull-rope
  • A second electromagnet for emergency voltage can be provided
  • Anti-condensation heating keeps horn and operating valve free from condensed water and ice
  • Full compliance with Colregs 1972 Annex III, IMO, and USCG regulations
  • Approved by all well known international authorities and classification societies
  • Near maintenance-free
  • Low weight



Zöllner’s Superior Line is handcrafted from the highest quality materials, providing a sense of both optical and acoustic perfection.  All Superior Line models are manufactured in accordance with the most stringent technical and aesthetic standards.  They are the personification of the level of expertise Zöllner has gathered on a global scale for nearly 70 years.

The Makrofon is a compressed air or carbon dioxide powered diaphragm sound transmitter.  Makrofons are reliable whistles distinguished by their low air consumption, strong sound intensity, and wide range of audibility.  Due to their simple and solid design, Makrofons are practically maintenance-free. The diaphragm casings are exclusively made of bronze or brass and seawater resistant plastic is used for the protective cover.

Zöllner offers complete ship set solutions: Horns, bells, gongs, maneuver lamps, sound reception devices, signal controllers, and inclinometers.


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