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| Number | Title | Issue Date |
| 8071871 | Electromechanical servo assisted drum A drum includes a shell having first and second, spaced apart ends defining an interior volume; first and second drumheads, each stretched over a respective one of the first and second ends of the shell; and an electromechanical driver having a moving coil element o... | 12/06/2011 |
| 8059856 | Methods and apparatus for providing a heat sink for a loudspeaker A heat sink for a loudspeaker assembly includes: a housing of generally toroidal shape defining an interior portion and an exterior portion; and a plurality of fins extending from within the interior portion of the housing to, and at least partially over, the exteri... | 11/15/2011 |
| D617827 | Guitar body | 06/15/2010 |
| 7672461 | Method and apparatus for creating a virtual third channel in a two-channel amplifier A method and apparatus for creating a third signal channel from an input signal received in each of a first and second channel involves inverting a predetermined frequency range of signals in the first channel out of phase with a corresponding frequency range of sig... | 03/02/2010 |
| 7586029 | Guitar and strap for playing in a standing configuration A guitar and strap address the shortcomings of convention guitar design and strap design such that the guitar may be suspended from the strap with a front plane of the guitar oriented generally horizontally, and with the higher frets of the guitar easily accessed by... | 09/08/2009 |
| D594896 | Guitar body | 06/23/2009 |
| D589512 | Guitar controller | 03/31/2009 |
| 7440577 | Methods and apparatus for automatic mixing of audio signals Methods and apparatus for automatically mixing a plurality of audio channels by adjusting respective gains of the audio channels using a control signal based on an aggregate of input levels of respective audio signals of the audio channels; and reducing the gain of ... | 10/21/2008 |
| D578563 | Guitar headstock | 10/14/2008 |
| D572302 | Guitar headstock | 07/01/2008 |
| D561240 | Guitar hole | 02/05/2008 |
| D555191 | Guitar headstock | 11/13/2007 |
| 7251333 | Method and apparatus for creating a virtual third channel in a two-channel amplifier A method and apparatus for creating a third signal channel from an input signal received in each of a first and second channel involves inverting a predetermined frequency range of signals in the first channel out of phase with a corresponding frequency range of sig... | 07/31/2007 |
| 7242779 | Methods and apparatus for sub-harmonic generation, stereo expansion and distortion Methods and apparatus are disclosed that achieve sub-harmonic signal processing, stereo-width expansion, sub-woofer signal processing, and tube distortion emulation to achieve various desirable acoustic effects when used to modify an input signal containing, for exa... | 07/10/2007 |
| 7203320 | Sub-harmonic generator and stereo expansion processor Methods and apparatus may provide for one or more of: receiving an input signal containing frequencies from among a first range; filtering the input signal to produce a first intermediate signal containing frequencies from among a second range; producing a sub-harmo... | 04/10/2007 |
| 7177439 | Methods and apparatus for dissipating heat in a voice coil The present invention is directed to methods and apparatus for dissipating heat in a voice coil of a loudspeaker, where at least one of: a bobbin having a substantially cylindrical shaped wall member is operable to support the voice coil, and the wall member include... | 02/13/2007 |
| 7171002 | Methods and apparatus for sub-harmonic generation, stereo expansion and distortion Methods and apparatus are disclosed that achieve sub-harmonic signal processing, stereo-width expansion, sub-woofer signal processing, and tube distortion emulation to achieve various desirable acoustic effects when used to modify an input signal containing, for exa... | 01/30/2007 |
| 7145392 | Methods and apparatus for variable harmonic distortion Methods and apparatus for producing first and second drive signals from an input signal such that each drive signal is about 180 degrees out of phase with respect to the other; variably altering at least one of the first and second drive signals such that their resp... | 12/05/2006 |
| D532774 | Audio mixer | 11/28/2006 |
| 7136493 | Sub-harmonic generator and stereo expansion processor A sub-harmonic generator includes: an input filter operable to receive an input signal containing frequencies from among a first range and to produce a first intermediate signal containing frequencies from among a second range; a signal divider circuit operable to r... | 11/14/2006 |
| 7053714 | Methods and apparatus for switching between class A and A/B operation in a power amplifier Methods and apparatus contemplate: an output transformer having at least first and second separate primary windings and at least one secondary winding, each winding including a first (in phase) end and a second (out of phase) end; at least first and second active el... | 05/30/2006 |
| D516607 | Guitar body | 03/07/2006 |
| 6975172 | Smart voltage rail reduction audio amplifier An audio amplifier is provided that adjusts the supply voltage rails communicated to a power amplifier circuit according to the circuit's output. The amplifier compares the output voltage from the power amplifier to a predetermined voltage range to determine if the ... | 12/13/2005 |
| 6690804 | Lighted microphone cable indicator A lighting apparatus for use with a microphone and a sound mixing system wherein each microphone has an associated channel located in the sound mixing system. Each microphone has a lighting means that assigns a particular color to that particular micropho... | 02/10/2004 |
| 6627808 | Acoustic modeling apparatus and method An apparatus and method for modeling an acoustic sound in an electric stringed musical instrument is provided. A preferred embodiment, among others, includes a bridge sensor configured to sensing string vibrations at the bridge of the instrument so that a... | 09/30/2003 |
| 6566767 | Selectable make-brake ground connector, cable and/or system A signal cable includes a first connector having at least one signal lead and a ground lead, and being operable to couple to a first mating connector of a first piece of electronic equipment; a second connector having at least one signal lead and a ground... | 05/20/2003 |
| 6549637 | Loudspeaker with differential flow vent means Differential flow vents allow airflow within a vent to be preferential. A flange disposed within a vent introduces non-linearities and causes a preferred direction of airflow into an expanding volume. The differential flow vents are used in conjunction wi... | 04/15/2003 |
| 6525258 | Electromechanical musical instrument pickup A musical instrument pickup having a central core bobbin with a first winding wound around the central core bobbin and a second winding wound around the first winding. Both ends of each winding are attached to a respective termination point. Each terminat... | 02/25/2003 |
| 6515859 | Heat sink alignment A heat sink alignment apparatus having an internal chamber with a plurality of heat sinks placed at an angled relationship to one another creating a tunnel through which air streams flows. At least one heat source is attached to a heat sink. A plurality o... | 02/04/2003 |
| 6465722 | Bridge for a musical instrument A bridge for attaching strings to a musical instrument. The bridge has a body comprised of a base and a main portion with saddle chambers formed in the main portion. Holes are formed within the saddle chambers. Each saddle chamber houses a saddle members ... | 10/15/2002 |
| 6400221 | Audio amplifier system with discrete digital frequency selective damping factor controls An audio amplifier drives a load in the form of a sound producing loud speaker exhibiting a frequency variable impedance characteristic over a range of audio frequencies. Voltage and current feedback circuits respectively establish a minimum voltage feedb... | 06/04/2002 |
| 6369305 | Guitar bridge A guitar bridge having a body comprised of a base and a main portion with a plurality of slots formed in the main portion of the body. A plurality of holes are formed in the body and located within the plurality of slots. A resonance chamber is formed in ... | 04/09/2002 |
| 6339360 | Digital amplifier with pulse insertion circuit A digital amplifier having an input for receiving an input signal employs an oscillator for producing a reference pulse signal and a sawtooth signal. A first generating circuit coupled to the oscillator is responsive to the reference pulse signal for prod... | 01/15/2002 |
| 6239655 | Microphone amplifier with digital gain control A remotely controlled microphone amplifier has a first amplifier stage with a variable gain circuit operatively connected in the overall feedback loop of the first stage for controlling the gain in first increments. A unity gain second amplifier stage has... | 05/29/2001 |
| 6101261 | Variable tilt loud speaker enclosure An enclosure has one or more loud speakers therein adjacent the front of the enclosure; and the back of the enclosure defines an opening. A pair of tilt members are mounted on inner surfaces of the enclosure at opposite sides thereof for sliding and rotat... | 08/08/2000 |
| 6064745 | Compression driver phase plug A phase plug for a horn loaded speaker has a frustro-conical body with a spherical entrance end and a planer outlet end. The plug is formed with radial channels. The entrance of the phase plug and the speaker diaphragm are conformal and the channels have ... | 05/16/2000 |
| 6059069 | Loudspeaker waveguide design A loudspeaker horn has straight wall section and a curved wall section. The straight wall section has diverging walls defining a coverage angle and the curved wall portion is connected to the straight wall portion at a point tangent thereto, and has a pro... | 05/09/2000 |
| 5796305 | Amplifier arrangements with high damping factor A circuit for increasing damping factor in an audio amplifier adapted to be coupled to a load by output feed and return leads and components having an impedance causing a reduction in the damping factor, employs a balanced feedback network having first an... | 08/18/1998 |
| 5737428 | Circuit for providing visual indication of feedback A compound differential circuit detects the highest relative signal of a plurality of input signals. Peak detector circuits including a sensing diode and a capacitor, are employed to produce a control signal. A switch receives the corresponding control si... | 04/07/1998 |
| 5675656 | Power amplifier with clipping level control In a power amplifier, a control device employing a dual ganged potentiometer is connected in the feedback circuits of successive amplifier stages to increase the gain of the front end stage while simultaneously reducing the gain in a subsequent stage when... | 10/07/1997 |
