How often do strings have to be changed?
Some people change them every year. I change them when I hear a difference in the tone – usually every 3 to 4 years, more if the harp isn’t used a lot. Old strings lose their rich harmonics first and become “thinner” in sound. Putting new strings on a harp is like having a new instrument. Be sure to only put on the strings recommended for your make and model of harp or you can damage the instrument.