Description
Rotosound UltraMag are the latest string offering from British string manufacturers Rotosound and wound with Alloy 52 – a unique blend of 52% Nickel and 48% Iron. Alloy 52 has a higher magnetic content than traditional nickel strings helping to deliver more output, volume and sustain. Not to mention the added benefit of longer string life. The wrap material also has a low coefficient of friction helping to improve tuning stability no matter the environment you find yourself playing in.
Rotosound materials expert, John Doughty, explained the science behind the strings;
“With a composition of 52% Nickel and 48% iron, this highly magnetic string will certainly accentuate those middles and lows over their steel counterparts. Designed for use in the aerospace industry and high-end electronics, the low coefficient of expansion will help maintain tuning in wide-ranging environments. With its corrosion resistant properties and its unique blend of sound, it is a truly a string for the discerning player seeking that extra tonal character.”

![Rotosound Ultramag Alloy-52 Wound 45-130 5-String Bass Guitar Strings, Long Scale [UM45-5]](https://www.stringrepairtools.com/wp-content/uploads/2026/03/rotosound-ultramag-alloy-52-wound-45-130-5-string-bass-guitar-strings-long-scale-um45-5-elodlvuq24692.webp)




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