Sound output has been confirmed with reverb working properly. The speakers are said to be the original Jensen from that time period. I received this as a gift. The tremolo has been reportedly repaired previously but is no longer functional. This is quite a rare vintage stereo amplifier from Gibson. The Gibson GA-79 RVT is a rare stereo tube combo amp from the early 1960s, mainly designed for stereo output guitars like the ES-345. ### Main Specifications - **Output**: Maximum 30W (stereo 2x15W). - **Speakers**: Jensen P10Q 10-inch x2. - **Tube Configuration**: 3-4 x 6EU7 in the preamp, 7199, 12AU7. Power section: 2 x 6L6 or 4 x 6BQ5/EL84 (varies by model year), 5V4 or diode for rectification. ### Channels - 2 channels. Each channel has Volume, Treble, and Bass controls. ### Effects - Reverb (effective and deep), Tremolo (with Depth/Freq controls). ### Features and Usability - Features a stereo/mono switch and can also be used with regular guitars, offering warm sound and excellent clarity. Only 409 units of the 1961 model were shipped, making it a rare find. The control panel includes guitar/accordion inputs and stereo input jacks, with a tweed cover and chrome panel. The original user manual includes a circuit diagram. This is a remarkable vintage stereo amplifier. Sound output is smooth and full with no noise. The tremolo engages momentarily when the switch is pressed but doesn’t maintain a constant tremolo effect. Everything else seems to be in working order; however, since it's a vintage amplifier, I ask for no claims or returns. If possible, direct pickup would be preferred.