ECC83S JJ tube Red Label Röhre made in SK 12AX7s JJ
equivalents:ECC803s-7025-CV492-CV4004-CV4035-M8214-M8137-6057-B339-E83CC
it is universal unusable for Music Amps and HiFi
it has a good gain & sustain (important for rock, metal) low microphony
in Hifi it plays warm and tight with nice mids.
Sound Description ECC83s JJ
Audio and High End
The ECC83s JJ is widely used as a preamp tube in HiFi systems and is often described by users as tonally well balanced. Reports from tube and high-end forums mention a stable core sound with a clean relationship between bass and midrange, combined with pleasantly open highs. Its dynamics are considered direct, allowing subtle volume differences to remain clearly audible. The sense of space is frequently perceived as well structured, with voices and instruments placed in an easy-to-follow soundstage.
Guitar Amps
In guitar amplifiers, the ECC83s is often chosen according to user feedback from musician and tube forums for its warm, mid-focused character. It provides sufficient gain for clean and crunch tones and is described as controlled in the highs, without sounding overly sharp. The bass stays tight, while the midrange supports presence and definition in a band mix. Its dynamics respond sensitively to picking intensity, contributing to an organic playing feel.
Technical Data and Design
Type: ECC83s / 12AX7 dual triode (preamp tube)
Category: Dual triode for audio and instrument amplifiers
Base: Noval B9A, 9 pins
Heater: 6.3 V / 300 mA or 12.6 V / 150 mA
Gain factor: typical µ ≈ 100 (ECC83/12AX7 standard)
Dimensions: approx. 55 mm height, approx. 22 mm diameter (without pins)
Pin layout: Standard 12AX7/ECC83 configuration, 9-pin Noval
Origin: Made in Slovakia (SK)
Note: All brand names mentioned, such as Marshall, Fender, etc., are registered trademarks of their respective owners and are used here for descriptive and compatibility purposes only.
JJ-Electronic s.r.o.
SK-02201 Cadca
Email: info@jj-electronic.com
The EU Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (2011/65/EU = "RoHS 2") aims to exclude certain hazardous substances from electrical and electronic equipment or to restrict the use of certain substances in electrical and electronic equipment. These include substances such as lead, mercury, cadmium, and chromium, as well as certain brominated flame retardants and plasticizers. These substances may only be used in electrical and electronic equipment up to a maximum concentration limit, unless exemptions in the annexes to the directive permit their use under certain conditions. This can reduce and eliminate harmful substances and improve the recycling of waste electrical and electronic equipment. To find out whether the component you purchased from us is permitted in your device, please refer to the current directive or the current law applicable to your country. If you are a manufacturer, please feel free to contact us to find out whether the component you require can be tested and approved according to the current directives. We would be happy to assist you.
Fact sheet on EU Directive 2011/65/EURestriction of the use of hazardous substances in electrical and electronic equipment (PDF, not accessible, 2 MB)
Source: IHK Mittelfranken
Tariff Number: 85408100
Country of Origin: SK