The user manual explains setup, operation, connections, controls, tube information, specifications, and warranty for the Mapletree Audio Design OD300 stereo…
This manual provides step‑by‑step instructions for installing and using the Mapletree Audio Design OD300 stereo headphone amplifier. It covers power‑up procedures, tube warm‑up, safety warnings, and how to connect the power supply to the amplifier chassis.
Detailed sections describe the input and output connections, headphone jack options (HiZ and LoZ), volume control, tube types, and technical specifications such as impedance, power consumption, and frequency response. Warranty information and service contacts are also included.
| Input impedance | 50 kΩ |
|---|---|
| Output impedance (LoZ) | 1.1 Ω |
| Output impedance (HiZ) | 2.1 Ω |
| Power consumption | 90 W, 120 VAC (50‑60 Hz) |
| Recommended load impedance | 16 Ω – 600 Ω |
| Hum and noise at output | < 3 µV rms (120 dB below max) |
| Tube types supplied | 1 × 6SL7 driver, 1 × 6080 output |
| Component warranty | 2 years |
| Tube warranty | 90 days |
Turn on the heater switch first, wait about one minute for the heater to warm up, then turn on the high‑voltage switch; both LEDs must be lit.
Check the 1 A/250 V fuse under the chassis after unplugging and waiting three minutes, then replace it with a spare if necessary.
Yes, the OD300 uses a 6SL7 driver and a 6080 output tube; replacement tubes are available from several suppliers in the U.S. and Canada.