1950s Kalamazoo Amp in very good condition. This late-1930s Kalamazoo tube amplifier was manufactured by Gibson in Kalamazoo, Michigan. The amplifier features a compact cabinet with black textured covering, gold vertical stripes, and a Kalamazoo script logo. A single speaker is mounted behind a circular perforated metal grille. The rear-mounted chassis features separate instrument and microphone inputs, a single microphone volume control, and an on/off toggle switch. The amplifier has six tube positions, including three RCA Radiotron 6C5 tubes and two larger glass tubes. The open-back cabinet provides access to the speaker and chassis. The amplifier shows cosmetic wear consistent with its age, including scuffs, scratches, and worn edges throughout. The handle is missing.