Outfit your amplifier with an Electro Harmonix 12AX7 ECC83 vintage tube, and recapture the sound of classic rock and roll, mellow blues, old-time jazz, or powerful orchestral music. The Electro Harmonix 12AX7 ECC83 vintage tube delivers a balanced and pure sound, due to its plate structure almost completely encasing the filament. This tube works great in preamps, tone stacks, and phase inverters, as well as older model radios and televisions. With a noticeable difference in audio tone and function, the Electro Harmonix 12AX7 ECC83 tube adds a classic dimension to modern guitar amps and equipment, while giving an authentic feel to vintage electronics devices. This unit lights up when working properly, ensuring quality sound and performance from this new old stock tube. The earliest vacuum tubes had a strong resemblance to incandescent light bulbs. The tubes were produced by lamp manufacturers because they had the equipment necessary to make glass envelopes, as well as the vacuum pumps needed to evacuate the glass tubes. The first tubes only achieved a partial vacuum, leading to less efficient and lower power tubes. As the demand for broadcast receivers increased, more economic ways to construct tubes were developed. Once oxide-coated filaments started being produced in the 1920s, the thermal distortion of tube structures allowed for closer spacing of the tube’s elements. This improved tube gain, since gains in triodes are inversely in proportion to the spacing between cathode and grid. Once this method became standard for tube manufacture, it ushered in the classic era of radio, television, and other popular electronics of the time. In general, about 80 percent of guitar amps are all-tube or hybrid models. Especially popular with today’s musicians are modern versions of classic Marshall, Vox, and Fender models from the 1950s and 1960s. Tube amplifiers are so popular because it’s the tone that musicians are after. Speakers and amplifiers become part of musical instruments. The peculiar speaker-damping characteristics and distortion of tetrode and pentode amps, with an output performer that matches speaker loads, is unique and very difficult to simulate with solid-state electronic devices. There are some digital signal processors and complex topologies that have been used, but these methods are apparently not entirely successful, and professional guitarists keep coming back to vacuum tube amplifiers. Even the wildest, most flamboyant rock musicians tend to be very conservative about the musical equipment they use to create their sound. Professionals who expect big bass from their guitar amps keep coming back to the proven technology of vacuum valves like the Electro Harmonix 12AX7 ECC83 vintage tube. Recording studios are influenced by the large number of musicians who prefer to use tube guitar amps. Classic condenser microphones, microphone preamps, equalizers, limiters, and other vintage devices have become valuable collectors’ items for recording engineers who have discovered the value of tube devices for creating special sound effects. The unique and special audio sounds that can be achieved with the Electro Harmonix 12AX7 ECC83 vintage tube makes it highly sought after by professionals and audiophiles.