This is a vacuum tube for guitar amplifiers made by JJ ELECTRONIC. It amplifies the weak signal from the guitar to the point where it can be driven by a power amplifier.
The ELECTRO-HARMONIX / 12AX7EH is a Russian-made preamp tube that boasts exceptional tonal balance. It's considered one of the highest quality preamp tubes currently in production, and its hum-canceling spiral filament ensures low noise. While it has a distinctive low-mid profile, it also boasts a well-balanced overall sound.
This is a vacuum tube for guitar amplifiers made by JJ ELECTRONIC. It amplifies the audio signal generated by the preamplifier tube into a signal large enough to drive the speaker.
SOVTEK is a vacuum tube manufacturer based in Satrav, Russia. Their low noise, consistent quality, and high reliability have earned them a strong following among many users. Their tubes are still used in amplifiers by world-renowned manufacturers such as Fender, Marshall, and Carvin.
ELECTRO-HARMONIX / EL34EH is a power tube with a well-balanced and rich tone. It has a deep and tight sound in the low range and a sweet and smooth tone in the mid range. It is said to be close to the sound of the coveted Mullard vacuum tube. EL34 tubes are used by many European amplifier manufacturers including Marshall, and play a major role in producing the British sound.
The ELECTRO-HARMONIX / 12AT7EH is a preamp tube characterized by its detailed tone. It uses a spiral filament with hum-canceling effect to achieve low noise. It also uses a large plate format for high gain, resulting in a powerful yet well-balanced sound. It is a preamp tube that is often used in reverbs and drivers.
These power tubes were used in classic Fender amps like the Champ and Princeton, and are still used in recent years by brands like Divided by 13 and Dr Z for their smooth, rounded tone.