1976 Electro-Harmonix LPB-2 Linear Power Booster

Very Good condition, 7/10, Made in USA, more info:

The plain-looking Linear Power Booster (LPB) was the first effect developed by founder of American company Electro‑Harmonix, Mike Matthews. The LPB-1 was a small box with an integral jack plug, while the LPB-2 was a normal floor pedal. The simple active circuitry carries out a single function, to boost the input signal and output it into an amp. The aim was to allow guitarists to push their valve preamps of the time into natural saturated overdrive. It was a deceptively clever idea that is now taken for granted. It seems strange that this demure effect contributed to Electro‑Harmonix becoming such a successful business. The ‘Off’ switch is effectively redundant, meaning that the only (nameless) control is the level of boost applied when the effect is switched on.

Features:

• Made in New York City, U.S.A. in c.1976
• The only knob controls the output volume (level of boost)
• The ‘Off’ switch controls whether the unit is on or off
• Standard footswitch turns the effect on and off
• Standard ¼” input and output mono jack sockets
• No LED status indicator or DC power supply input – 9V battery only
• No battery compartment in the base of the unit