The Roland EH-10 is a pre‑amplifier for erhu that provides built‑in effects, a tuner and battery or AC power options. This manual explains how to connect the unit, adjust volume and effects, and use the tuner and battery safely.
It also includes troubleshooting tips, specifications, safety warnings and maintenance instructions to keep the pre‑amp operating reliably. This manual is written in Chinese.
| Design input level | -25 dBu |
|---|---|
| Input impedance | 22 kΩ |
| Design output level | -20 dBu |
| Output impedance | 1 kΩ |
| Battery type | 9 V carbon or alkaline |
| Rated current | 65 mA (9 V DC) |
Insert the plug into the output jack; the output jack also acts as the power switch, so the device powers on.
Remove the battery cover as shown, take out the battery clip, install a new 9 V battery, and re‑attach the cover.
The POWER LED lights when the unit is on and also monitors battery level; it dims or goes out when the battery is low.
Press and hold the TUNER key for more than two seconds; the tuner LED lights, the instrument mutes, and you play open strings until the pitch LEDs stay solid.