What is a group of Guitars called?

A group of guitars is commonly called a Melody. Other collective nouns you may see include Sound.

Collective nouns are unique and interesting ways to describe groups of the same type of object or beings, typically animals, with a single term. While there isn't specifically a widely recognized collective noun for guitars, we can creatively suggest "a harmony of guitars" as a fun and fitting description for such a group. Just as the word harmony refers to the simultaneous combination of different musical notes to create pleasing sounds, a collective noun "a harmony of guitars" beautifully captures the essence of several fretted instruments coming together to produce enchanting music. Visualize a band or a gathering of guitarists, their distinctive strums and melodies blending into one seamless song, evoking feelings of unity, synchronization, and musical euphoria. Guitars, often associated with concerts, jam sessions, or an evening around the bonfire, generate both emotional and rhythmic bonds as their strings resonate harmoniously. By utilizing the word "harmony" as a collective noun, we invoke exactly these connections between musicians and their instruments, contributing to a memorable and evocative image in one's mind. Ultimately, while it may not be a commonly recognized term, a "harmony of guitars" can evoke a powerful imaginative representation of unity, rhythm, and the collaborative nature of musicians coming together to create mesmerizing music.