Electro-Harmonix LPB-1 Linear Power Booster 1970's Preamp Module
The original LPB-1 circuit that introduced overdrive in 1968. Put this little monster in line before any effect to provide boost and definition. Improves the gain and saturation of your amp. Works off 9v battery. Be like Ace Frealey. Pick up from North Fitzroy or posted at buyer's expense.