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2. Amplifier modeling - Wikipedia

   en.wikipedia.org/wiki/Amplifier_modeling

   The Roland Micro Cube, left, a small and portable digital modeling amplifier. Digital amp modelers Standalone modeling devices such as the Line 6 POD and Fractal Axe-FX digitize the input signal and use a DSP, a dedicated microprocessor, to process the signal with digital computation, attempting to achieve the sound of expensive professional amplifiers in a much less costly and more compact ...

3. Guitar Rig - Wikipedia

   en.wikipedia.org/wiki/Guitar_Rig

   Guitar Rig was first released on both macOS & Windows in September 2004. At this time, it was a hardware/software hybrid system, with the Rig Kontrol hardware preamp and foot controller feeding into the software. The software featured a drag-and-drop interface and a selection of 3 tube amplifier emulations (some with multiple preamp variations ...

4. Tube sound - Wikipedia

   en.wikipedia.org/wiki/Tube_sound

   Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based audio amplifier. [1] At first, the concept of tube sound did not exist, because practically all electronic amplification of audio signals was done with vacuum tubes and other comparable ...

5. 12AX7 - Wikipedia

   en.wikipedia.org/wiki/12AX7

   In this role it is widely used for the preamplifier (input and mid-level) stages of audio amplifiers. It has relatively high Miller capacitance, making it unsuitable for radio-frequency use. Typically a 12AX7 triode is configured with a high-value plate resistor, 100 kohms in most guitar amps and 220 kΩ or more in high-fidelity equipment.

6. Instrument amplifier - Wikipedia

   en.wikipedia.org/wiki/Instrument_amplifier

   In some cases, tube and solid-state technologies are used together in amplifiers. A common setup is the use of a tube preamplifier with a solid-state power amplifier. There are also an increasing range of products that use digital signal processing and digital modeling technology to simulate many different combinations of amp and cabinets.

7. Effects loop - Wikipedia

   en.wikipedia.org/wiki/Effects_loop

   An effects loop is a series of audio effects units, connected between two points of a signal path (the route that a signal would travel from the input to the output); usually between the pre-amp and power amp stages of an amplifier circuit, although occasionally between two pre-amp stages. The two principal uses of effects loops are in ...

8. Guitar amplifier - Wikipedia

   en.wikipedia.org/wiki/Guitar_amplifier

   Some guitar amplifiers have a graphic equalizer, which uses vertical faders to control multiple frequency bands. Some more expensive bass amps have a parametric equalizer, which enables precise control of tone. The first amplifier stage is a preamplifier. It amplifies the audio signal to a level that can drive the power stage.

9. Fender Champ - Wikipedia

   en.wikipedia.org/wiki/Fender_Champ

   It is then fed into the first triode of the 12AX7, which acts as a second stage preamp, provides the additional tube gain for both channels and acts as an interface between the solid-state circuitry and the tube circuitry. The second triode is a phase inverter, which creates mirror images of the signal to drive the output tubes.