The ONEFORSTRINGS 5FERDI amplifier is a powerful 75-watt amplifier, designed for acoustic and classical guitars. It features 3 separate inputs, plus an Aux input (TRRS audio in/out and Bluetooth audio), each equipped with independent volume control and 2-band EQ.

The 3 inputs are equipped with gain control, 3-band EQ, FX send and volume. Input 1 offers additional functions, including a compressor and a switch that adapts the channel characteristics according to the selected instrument type:

1. Flat: "Standard" equalization for acoustic and classical instruments, making channel 1 identical to channels 2 and 3.
2. Bass: Ideal for instruments with a pronounced bass range, such as electric bass, acoustic bass, or double bass.
3. Jazz: Designed for electric or semi-acoustic/jazz guitars.