Clock maker Matthias Hohner began crafting harmonicas in 1857, assisted by his wife and a single employee. 650 were made in the first year.[1] Hohner harmonicas quickly became popular, and in his lifetime Matthias built the largest harmonica factory in the world.[2] During the American Civil War, Matthias Hohner distributed harmonicas to family members in the United States who in turn gave them to the soldiers.[3]
Due to the acoustic, aesthetic and processing properties (workability, finishing, joints) the wood and the ligno-cellulose composites are the most valued materials for the musical instruments' construction. The guitar is made up of a complex structure, formed by a vertical wall in a curve shape (technologically named "sides") and two faces made up of ligno-cellulose plates, so that it should... [Show full abstract]

When playing seventh chords, guitarists often play only subset of notes from the chord. The fifth is often omitted. When a guitar is accompanied by a bass, the guitarist may omit the bass note from a chord. As discussed earlier, the third of a triad is doubled to emphasize its major or minor quality; similarly, the third of a seventh is doubled to emphasize its major or minor quality. The most frequent seventh is the dominant seventh; the minor, half-diminished, and major sevenths are also popular.[79]
Engineers invented the first loud, powerful amplifier and speaker systems for public address systems and movie theaters. These large PA systems and movie theatre sound systems were very large and very expensive, and so they could not be used by most touring musicians. After 1927, smaller, portable AC mains-powered PA systems that could be plugged into a regular wall socket "quickly became popular with musicians"; indeed, "...Leon McAuliffe (with Bob Wills) still used a carbon mic and a portable PA as late as 1935." During the late 1920s to mid-1930s, small portable PA systems and guitar combo amplifiers were fairly similar. These early amps had a "single volume control and one or two input jacks, field coil speakers" and thin wooden cabinets; remarkably, these early amps did not have tone controls or even an on-off switch.[1]

As we mentioned before, the first mass-produced solid body electric guitar was introduced in the early ‘50s as a way for guitar players to avoid getting that unwanted feedback that amplified hollow body electric guitars were infamous for. Today, there are countless solid body guitars to accommodate any type of player and price range—from beginner guitar players to seasoned pros playing genres spanning hard rock, country, blues, heavy metal, jazz, and more! Some of the most popular solid body electric guitars include the Fender Telecaster, the Fender Stratocaster, the Gibson Les Paul, the Gibson SG, the Ibanez RG, and the ESP Eclipse.