The Class A Boost is a three-stage transistor equalizing circuit with
    a tone that faithfully matches the simple purity of its design.
    3 independent equalization circuits are connected
    to drive specially selected frequency ranges,
    and with the collective balance a player
    can dial in one"s desired tone.
    The full-range Lo-boost is warmly fuzzy yet
    never harsh, yielding a tight sound that
    works well with not only electric guitars,
    but also makes an excellent boost for
    bass guitarists who need a wide-range
    boost that accentuates a full low end.
    The Mid Boost helps define the essential
    sonic contour in a guitar"s mid frequencies,
    providing a clear and present midrange when
    boosted without typical overdrive clipping,
    resulting in a refreshing midrange drive. The Hi
    Boost is based on the silicone transistor treble
    boosters of the "60s and "70s, boosting upper
    frequencies with a uniquely clear and transparently
    shimmering high end. The Lo, Mid, and Hi boost circuits
    work together to provide the tools to uniquely shape one"s
    individual tone.
    No one can deny the importance of the treble booster in the history
    of the British Rock sound, and now the same circuit type embodied
    and expanded in the Class A Boost elevates the tonal
    legacy the tonal legacy of the original treble
    booster to a whole new level.
    Enabling one to approach tone from new
    angles, the Class A Boost is born of an
    experimental idea (circuitry, design)
    developed to incur a new degree of
    creative response from a player.

    Note:
    As the Class A Boost was designed to
    matched passive pickups, it should not be
    used either with active pickups or following a
    low impedance input signal (such as a buffered pedal).