The Bogner Mephisto amplifier user manual explains controls, inputs, foot controller, specifications, and troubleshooting for this dual‑channel tube amp.
This manual describes the Mephisto’s dual‑channel tube design, featuring independent 6V6 and EL84 amplifiers with shared high‑ and low‑gain inputs, volume, tone, and a rotary body control. It details the foot controller functions for channel switching, parallel operation, and a power attenuator that retains cranked‑amp tone at low volumes.
Additional sections cover dimensions, weight, fuse specifications, and troubleshooting tips for tube and circuit issues, helping users set up and maintain the amplifier safely and effectively.
| 6V6 power output | 12 W Class A |
|---|---|
| EL84 power output | 18 W Class A |
| Tube rectifier | 5Y3 (5AR4/GZ34 optional) |
| Speaker output | Single 8 Ω |
| Head dimensions | 10.50" H × 20.75" W × 8.25" D |
| Combo dimensions | 17.50" H × 23" W × 9.50" D |
| Main fuse rating | 2 A slow‑blow |
| HT fuse rating | 500 mA slow‑blow |
Use the foot controller’s 84/6V center footswitch to select either amplifier, and the left footswitch to run both in parallel.
The head measures 10.50" H × 20.75" W × 8.25" D and weighs about 32 lb.
It uses a 2 A slow‑blow main fuse and a 500 mA slow‑blow HT fuse.