A built-in distortion on electric guitars and basses that has been designed on the Simulation of Historical Drive Sounds. It is like having 4 of the most famous Overdrive Pedal & Tube Amp Tones, but without the “tap dancing” and tripping over cables. The way to install the QDD inside of guitar eliminate the cable noise.
In general, an external effector has been used the Distortion effect because of the fact that the external effector make more professional drive lately. However, the QDD can make a precisely simulated sound with very simple and economical way of installation and provide a various distortion features that allows to increase your guitar’s value and versatility.
Each unit also features a small “output level” trim pot (that is the little blue “box” mounted directly on the unit) that allows you to set the amount of gain used, to your personal taste and heaviness.

The QDD circuit has a 5 position selector:

1 – True bypass (passive)

2 – Clean booster

3 – Blues overdrive

4 – Rock distortion

5 – Heavy metal

Only extremely little amounts of current drain (0,16 mA) required.

Your 9 V battery will last long for years. More than 3000 hours in continuous use workable voltage

QDD will work with passive, active pickup and bass guitars.

Easy and simple installation