Patents Assigned to Mesa Boogie
  • Patent number: 9917560
    Abstract: Disclosed is an amplifier for incremental wattage reduction. The amplifier comprises a first pair of pentode vacuum tubes and a second pair of pentode vacuum tubes arranged in a push-pull-parallel power configuration. Each pentode vacuum tube from the first pair of pentode vacuum tubes and the second pair of pentode vacuum tubes includes a plate element, a screen grid element and a cathode element. The amplifier further comprises a single multi-position user switch to configure the first pair of pentode vacuum tubes and the second pair of pentode vacuum tubes to achieve varying wattage outputs of the amplifier by deactivating at least one of the first pair of pentode vacuum tubes or the second pair of vacuum tubes, and causing at least one of the first pair of pentode vacuum tubes or the second pair of vacuum tubes to operate as triodes.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 13, 2018
    Assignee: MESA/Boogie Ltd.
    Inventor: Randall Smith
  • Patent number: 8766082
    Abstract: An amplifier for electric guitar including a Cut control for attenuating high frequencies whose operation is expanded via a switch to alternately function as a Master Volume control.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: July 1, 2014
    Assignee: Mesa/Boogie, Ltd.
    Inventor: Randall C. Smith
  • Patent number: 7602927
    Abstract: An amplifier for electric guitar including a plurality of foot switch selectable preamplifier channels which can be set to provide differing sonic characteristics, and also including a power amplifier section for driving a loudspeaker that can be switched between at least two different power or performance capabilities. User operable switching dedicated to at least one of the preamplifier channels is provided to select preferred power amplifier parameters in conjunction with differing channel voicings. Thus, differing preferred power amplifier characteristics may be pre-set and assigned to individual preamplifier channels and called up automatically in conjunction with the remote channel selection.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: October 13, 2009
    Assignee: Mesa/Boogie, Ltd.
    Inventor: Randall C. Smith
  • Patent number: 7173488
    Abstract: A vacuum tube power amplifier with a user-operable switch and a single output transformer which selectively provides push-pull or single ended configurations for driving a loudspeaker.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: February 6, 2007
    Assignee: Mesa Boogie
    Inventor: Randall C. Smith
  • Patent number: 5793252
    Abstract: An electronic amplifying apparatus for sound reproduction and musical instrument amplification including at least two pairs of power output devices which are independently switchable between triode and pentode operation. The amplifier further contains a switch apparatus to select the amount of negative feedback within the amplifier.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: August 11, 1998
    Assignee: Mesa Boogie, Limited
    Inventor: Randall C. Smith
  • Patent number: D636374
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: April 19, 2011
    Assignee: Mesa/Boogie Ltd.
    Inventor: Randall C. Smith