12AX7 / ECC83 / 5751

The 12AX7EH provides high gain with ultra low noise and detailed, musical tone that rivals the most desirable NOS types.

Files:

• Datasheet

TT Selection: Balanced
Both systems with balanced gain

The 12AX7EH provides high gain with ultra low noise and detailed, musical tone that rivals the most desirable NOS types.

Files:

• Datasheet

Premium gold pin version of 12AX7. High gain preamplifier tube with ultra low noise and detailed musical tone. Wilth goldplated PINs.

Files:

• Datasheet

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

The 12AX7EH provides high gain with ultra low noise and detailed, musical tone that rivals the most desirable NOS types.

Files:

• Datasheet

Electro-Harmonix has released a low noise, low microphonic version of the 12AX7 that meets all specifications required for the tube to be designated 7025. The original 7025 tube was a 12AX7 that was tested and selected for the lowest noise and microphonics for use in the critical first preamp stages of amplifiers where noise and microphonics could be an issue. In order to ensure that the 7025 specification is consistently met, Electro-Harmonix has redesigned the structure of the 12AX7 and has implemented construction techniques to ensure the absolute lowest noise and microphonics possible. In all samples tested, noise and microphonics could not be detected.

The Electro-Harmonix 7025EH has a mid-range that gives clarity and definition to the sound and a smooth top end for warmth and balance. With these characteristics, along with the exceptionally low noise and low microphonics, the Electro-Harmonix 7025EH will work equally well in vintage and modern high-gain guitar amplifiers, as well as sensitive phono preamps.

Genalex Gold Lion 12AX7 / ECC83 / B759 - Reissue

Original Genalex Gold Lion ECC83/B759 tubes are considered among the best 12AX7 types ever made. They are hard to find and when they are available, they are expensive. They exhibit a large detailed soundstage that is sought after by discerning audiophiles who demand the highest quality sound. The reissue Genalex Gold Lion ECC83/B759 recreates the sound signature of the original.
To be labeled Genalex Gold Lion, tubes must endure and pass the toughest testing the industry offers.

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

TT Selection: Balanced
Both systems with balanced gain

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

All JJ preamp tubes are selected within a close tolerance and handtested for best sound and quality. Furthermore all pins are gold plated to achieve best electrical contact.
What about the sound? It is still the famous and well known JJ brownsound - warm and smooth.

Files:

• Datasheet

TT Selection: Balanced
Balanced gain on both systems

All JJ preamp tubes are selected within a close tolerance and handtested for best sound and quality. Furthermore all pins are gold plated to achieve best electrical contact.
What about the sound? It is still the famous and well known JJ brownsound - warm and smooth.

TT Selection: PAIR, 2 tubes
All systems with balanced gain

All JJ preamp tubes are selected within a close tolerance and handtested for best sound and quality. Furthermore all pins are gold plated to achieve best electrical contact.
What about the sound? It is still the famous and well known JJ brownsound - warm and smooth.

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

All JJ preamp tubes are selected within a close tolerance and handtested for best sound and quality. Furthermore all pins are gold plated to achieve best electrical contact.
What about the sound? It is still the famous and well known JJ brownsound - warm and smooth.

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

Compared with the JJ 12AX7/ECC83, the JJ ECC83/12AX7 MG has a slightly smoother sound and appears to operate more linearly. It is ideal for low- to medium-gain amplifiers, audio applications, and for taming amplifiers with a very hot voicing. It is also a good alternative to the 5751 and 12AY7.

TT Selection: Balanced
Balanced gain on both systems

Compared with the JJ 12AX7/ECC83, the JJ ECC83/12AX7 MG has a slightly smoother sound and appears to operate more linearly. It is ideal for low- to medium-gain amplifiers, audio applications, and for taming amplifiers with a very hot voicing. It is also a good alternative to the 5751 and 12AY7.

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

Compared with the JJ 12AX7/ECC83, the JJ ECC83/12AX7 MG has a slightly smoother sound and appears to operate more linearly. It is ideal for low- to medium-gain amplifiers, audio applications, and for taming amplifiers with a very hot voicing. It is also a good alternative to the 5751 and 12AY7.

JJ 12AX7 MG / ECC 83 MG with gold plated pins.

The newest member in the JJ family of ECC83/12AX7 tubes is the JJ ECC83MG. The MG is a 12AX7 with a bit lower amplification than a standard 12AX7. Our measurements show that the difference is small, but the new tube sounds more linear than the standard JJ 12AX7, and in amps produces a milder, gentler sound. The mechanical construction shows that it is not just another minor variation of the normal JJ 12AX7. The new tube has longer plates. The JJ ECC83MG is interesting for low and medium gain amplifiers, as well as for audio, where a too hot amp needs to be tamed; as well as an alternative to a 12AY7.

Files:

• Datasheet

This tube is recommend to tame the gain of an amp and make it sound "sweeter". The 5751 has only a gain of 70 instead of 100 like the typical 12AX7/ECC83 tube type and can be used as a drop in replacement for 12AX7 / ECC83 tubes.

Files:

• Datasheet

 

Sonically similar to the "normal" JJ 12AX7, but the overall sound is "fuller" and "stronger" with a more powerful bass. Visually, compared to the normal JJ 12AX7, the long anode plates stand out, as well as a slightly higher current. Suits well in guitar and bass amps, but also in audio and high-end areas.

All JJ gold preamp tubes are selected within a close tolerance and handtested for best sound and quality. Furthermore all pins are gold plated to achieve best electrical contact.
What about the sound? It is still the famous and well known JJ brownsound - warm and smooth.

Note: Tubes equipped with long plates are commonly associated with a "warmer" or "richer" sound, whereas those with shorter plates tend to deliver a "tighter sound". However, tubes featuring long plates exhibit increased sensitivity to vibrations and mechanical disturbances, rendering them less ideal for critical applications.

Files:

• Datasheet

Mullard 12AX7 / ECC83 Reissue, with long plates

• TT Selection: PAIR, 2 tubes
• All systems with balanced gain
• Made in Russia
• Long Plate

Psvane 12AX7 / ECC83 preamp tube from the Classic series with red logo.
Dropin replacement for all 12AX7, ECC83 and 7025 tubes.

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TT Selection: Balanced
Both systems with balanced gain

Psvane 12AX7 / ECC83 preamp tube from the Classic series with red logo.
Drop-in replacement for all 12AX7, ECC83 and 7025 tubes.

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