Guitar amplifier
Assignee3rd Power Amplification Systems
InventorJames Edward Scott
Life of this patent
Estimating the term…
Abstract
A system and method for a guitar amplifier that overcomes the disadvantages of known amplified speaker enclosures and circuits while providing more effective volume control. A venue switch selects different output ranges for the guitar amplifier. Volume control still adjusts output regardless of venue switch position. In the low-output setting for the venue switch a house or other quiet venue is accommodated with the guitar amplifier that can work in larger venues in the high-output setting.
Claims20
A guitar amplifier for boosting a signal from an electric guitar, comprising:
- an enclosure;
- an input for receiving the signal from the electric guitar;
- a pre-amp stage;
- a phase inverter stage;
- a power amp stage;
- a plurality of vacuum tubes used to process the signal, wherein each of the pre-amp stage, the phase inverter stage, and the power amp stage include the plurality of vacuum tubes to process the signal;
- a speaker output;
- a volume knob that adjusts amplitude of the signal for the speaker output;
- and
- a venue switch accessible to the user of the guitar amplifier, wherein:
- the venue switch has first position and a second position that changes amplitude of the signal after the pre-amp stage, whereby distortion of the pre-amp stage is preserved regardless of a position of the venue switch,
- the plurality of vacuum tubes process the signal in both the first position and the second position,
- in the first position the volume knob adjusts amplitude in a first range,
- in the second position the volume knob adjusts amplitude in a second range different from the first range,
- the first range has a first maximum amplitude,
- the second range has a second maximum amplitude, and
- the first maximum amplitude is less than half of the second maximum amplitude.
A guitar amplifier for processing a signal from a guitar, comprising:
- an enclosure;
- an input for receiving the signal from the electric guitar;
- a pre-amp stage;
- a phase inverter stage;
- a power amp stage;
- a plurality of vacuum tubes used to process the signal, wherein each of the pre-amp stage, the phase inverter stage, and the power amp stage include the plurality of vacuum tubes to process the signal;
- a speaker output;
- a volume knob that adjusts amplitude of the signal for the speaker output;
- and
- a venue switch accessible to the user of the guitar amplifier, wherein:
- the venue switch has first position and a second position that changes amplitude of the signal after the pre-amp stage, whereby distortion of the pre-amp stage is preserved regardless of a position of the venue switch,
- the plurality of vacuum tubes process the signal in both the first position and the second position,
- in the first position the volume knob adjusts power in a first range,
- in the second position the volume knob adjusts power in a second range different from the first range,
- the first range has a first maximum power greater than 30 Watts, and
- the second range has a second maximum power less than 20 Watts.
Dependencies are inferred from the claim text.