1958 Gibson GA-90 A very rare and cool amp! Goes with any cool vintage late 50's Gibson. Model GA-90 was introduced by Gibson in 1954. It is a 30 watt amplifier with 6 Jensen 8J11 speakers. For Tubes it used: 5v4, 2x5881, 6SN7's, 5879's, and 12AU7. This is the later "New style" with 6 knobs. As used by Elvis Presley Band!