Main amp is applied after equalizer
Currently there is no pre-amplifier which makes using the equalizer difficult.
For example if I ramp the 55 Hz up to +12dB, the output is extremely distorted. Normally you would fix this by having another slider that pre-amps the signal (lower) before applying the equalizer. iTunes for example has this. There is a global slider for volume but it is apparently applied after the equalizer. Meaning that if I crank 55 Hz to +12dB, then lower the main volume, the sound is still distorted, but quieter.
The solution would either be to add another slider to the EQ that can be used to lower the signal before applying the EQ, or switch the global volume slider to be applied before the equalizer.