Silicon Tube Damper for 12AX7, EL84

TT Selection: Balanced
Both systems with balanced gain

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.

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

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.

Premium medium-Mu Twin Triode for use in preamplifier.

• Type: Metalized Polyester Film Capacitors
• Voltage Rating: 400 V
• Tolerance: +/- 10%
• Operating Temperature Range: - 40°C / + 85 °C
• Termination Style: axial

• Type: Metalized Polyester Film Capacitors
• Voltage Rating: 400 V
• Tolerance: +/- 10%
• Operating Temperature Range: - 40°C / + 85 °C
• Termination Style: axial

• Signal wire LiYDY 1 x 0,5 mm², shielded
• Voltage Rating max: 250 V
• Length: 2 m

• Operation Voltage: 500 V
• Packing: 100 m

• Insulation: Silicon
• Operation Voltage: 300 V AC / 500 V DC
• Packing: 5 m

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 47 µF
• Voltage Rating: 450 V
• Tolerance: - 20 % / +20 %
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 18 mm x 39 mm
• Termination Style: axial

Very linear working 12AX7 / ECC83 with long anode plates and spiral heating, which makes the tube less sensitive to interference from AC heating.
We recommend this tube for audio and high-end amps as well as for "modern" Fender amps with more overdrive, but also as an input tube in old Marshall JCM800s.


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.

• Solder with flux core
• Ideal for fine soldering and contact soldering jobs requiring corrosion-resistance and high production working speed.
• DIN EN ISO 9453: Sn60Pb39Cu1
• DIN EN 61190: Sn60Pb38Cu02
• Melting range: 183 to 190 °C
• Solder diameter: 1,0 mm²
• Spool size: 100 g

Spring Retainer EL84 / ELL844 and tubes with a similar size

Retainer for 12AX7 and tubes with a similar size