Granada is a Germanium Driver based on the vintage tone from the old Rangemaster units.
It comes equipped with all NOS Capacitors and Transistors
This units used the OC44 transistor black glass
The germanium transistor option is in a modern PCB point-to-point simulated, where the componentes was assambled like the old way point to point but in a modern PCB for isolate the transistor welding.
 
The booster to bring out a tone, from soft and harmoniou tone to aggressive and distorted sound.
 
The Granada have three controls, " V, T and G"  Volume, Tone and Gain.
 
The GRX can be powered by either 9V batteries or power supplies.
It uses 2.1 boss type barrels, with negative center, and to avoid noise and leaks, it uses an Isolda power supply. if you don't use an isolated power supply, this noise/oscillation could leak to the other pedals even when the pedal is off. please avoid the daisy chain.