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2. 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.

3. Bogner Amplification - Wikipedia

   en.wikipedia.org/wiki/Bogner_Amplification

   [2] The Caveman amplifier was built not long after the Ecstasy and featured two channels completely hand-wired. The production run was 60 units. Bogner Shiva head. The company's heaviest amplifier, the Überschall (German for "supersonic"), was inspired by a local guitarist who repeatedly encouraged Bogner to produce an amp with more bass and gain.

4. Audio power amplifier - Wikipedia

   en.wikipedia.org/wiki/Audio_power_amplifier

   Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.

5. Powered speakers - Wikipedia

   en.wikipedia.org/wiki/Powered_speakers

   An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...

6. PS Audio - Wikipedia

   en.wikipedia.org/wiki/PS_Audio

   PS Audio's first product was a standalone phono preamplifier, sold direct to consumers for $59.95. The small unit had a passive RIAA curve sandwiched between two 709C op amps running in class A mode and considered state of the art at the time for solid state. Later iterations of the phono preamplifier were introduced that moved away from the ...

7. 845 (vacuum tube) - Wikipedia

   en.wikipedia.org/wiki/845_(vacuum_tube)

   A modern Chinese-made 845 tube. The 845 power triode is a radio transmitting vacuum tube which can also be used as an audio amplifier and modulation tube. Typically, the plate is machined from solid graphite in order to accommodate high power dissipation (up to 100 watts) and voltage.

8. Realistic (brand) - Wikipedia

   en.wikipedia.org/wiki/Realistic_(brand)

   The Realistic DX-60 is a multiband radio. The radio receives 3 MHz to 27 MHz AM shortwave in three bands, 26.965 MHz through 27.405 MHz HF CB in one band, 540 kHz to 1620 kHz standard AM broadcast in one band, and 87 MHz to 108 MHz monaural standard broadcast FM. The DX-60 existed in two versions, model 12-764 and a nearly identical but ...

9. Guitar amplifier - Wikipedia

   en.wikipedia.org/wiki/Guitar_amplifier

   There is a wide range of sizes and power ratings for guitar amplifiers, from small, lightweight practice amplifiers with a single 6-inch speaker and a 10-watt amp to heavy combo amps with four 10-inch or four 12-inch speakers and a 100-watt amplifier, which are loud enough to use in a nightclub or bar performance.