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TELEFUNKEN

12AX7 ECC83 TELEFUNKEN Matched Pair Tubes – Smooth Plates Diamond Bottom Made in Western Germany

12AX7 ECC83 TELEFUNKEN Matched Pair Tubes – Smooth Plates Diamond Bottom Made in Western Germany

€219,00 EUR
€249,00 EUR €219,00 EUR
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12AX7 ( ECC83 ) TELEFUNKEN Smooth Plates Diamond Bottom Matched Pair Tubes Made in Western Germany '60s

Sound Description:

The 12AX7 TELEFUNKEN , in this sought-after 1960s version with Smooth Plates , Diamond <> Bottom , represents one of the highest standards of European tube production.
Crafted at the historic Ulm factory, this select pair combines refined musicality , low noise and impeccable tonal coherence , making it an ideal choice for audiophile applications, recording studios and reference hi-fi equipment.

Bass : Fast, dry, and defined. The low end is tight and articulate, without artificial bloat. It provides a clean, solid foundation, perfect for systems that prioritize precision and control.

Mids : Transparent, fluid, and three-dimensional. Voices emerge with naturalness and presence, while acoustic instruments are reproduced with balance and realism. The Telefunken midrange is known for its elegance and ability to reveal subtleties without overemphasis.

Highs : Refined, detailed, and never fatiguing. The upper range is bright but free of harshness, with a natural openness that adds air and spaciousness to the scene without becoming intrusive.

Dynamics : controlled, precise, and progressive. The response to microdetails is extraordinary, with a smooth and coherent rendition of the most complex excursions. The tube maintains composure even in the presence of fast passages or recordings rich in transients.

Soundstage : Wide, coherent, and well-layered. The stereo image is focused, with clear separation of sound planes and stable spatial reproduction, resulting in a believable and natural soundstage.

The 12AX7 TELEFUNKEN – Smooth Plates – Diamond Bottom – Made in Western Germany '60s is one of the most highly regarded tubes in the history of audio. Synonymous with German precision, tonal neutrality and legendary durability , it is the choice of choice for those seeking transparency, micro-detail and long-term consistency .

🎧 Use in Headphone Amplifiers and Hi-Fi Driver Stages

Perfect for high-resolution tube preamps, DACs with tube analog stages, OTLs, or reference headphone amplifiers. Particularly suitable for use with models such as the Focal Clear , ZMF Atrium , Sennheiser HD800S , or Hifiman Arya , for a neutral yet engaging performance with excellent headroom and microdynamics.

🎸 Use in Guitar and Bass Amplifiers

In the preamp sections of Marshall , Hiwatt , or Fender Custom Shop amplifiers, the TELEFUNKEN 12AX7 guarantees a clean, dynamic, and noise-free response, ideal for both studio recording and live performance where clarity and definition are essential. The attack is prompt but not aggressive, with natural harmonics and well-controlled sustain.

🎯 Note for audiophiles and technicians
An absolute reference pair for those who want neutrality, definition and reliability , both in critical reproduction systems and in top-level audio systems.

Test Results

Tested on AMPLITREX AT-1000 Tube Tester

Voltage Test: Va = 250V, Vg = -2V
Average 100%: Gm = 1600 ; Ia = 1.2 mA
TEST RESULT: VERY STRONG

Valve 1 :

  • Section 1 : Gm = 1500; Ia = 0.9 mA
  • Section 2 : Gm = 1500; Ia = 1.0 mA

Valve 2 :

  • Section 1 : Gm = 1500; Ia = 0.8 mA
  • Section 2 : Gm = 1400; Ia = 0.7 mA

Additional Tests Performed:
  • Microphonics: Low. Tested and approved for use in hi-fi and guitar amplifiers, including V1.
  • Balance: The sections show a slight deviation in values; excellent for use in hi-fi and musical applications (guitar).
  • Output Quality: Excellent – Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Aesthetic condition: Fair – Writing almost completely faded, with obvious signs of wear on the glass or feet. See photos for details.
  • Manufacturing Code: None – Telefunken Made in Germany, identifiable by construction features. 1960s

Find out why our valves are different →

Terms of Sale & Safety

Sales Terms & Product Safety

Each vacuum tube is carefully selected, tested, and verified in our laboratory before shipment. Where stated in the listing, test results, matching data, and declared characteristics refer to measurements performed using the specified test equipment and operating conditions.

Sound descriptions are provided for guidance only and reflect the characteristics generally associated with that particular tube type. Personal sound preferences, tube rolling, or perceived differences between audio systems do not constitute a product defect.

Before installation, please verify the tube’s electrical and mechanical compatibility with your equipment and follow the manufacturer’s instructions.

New production and NOS tubes are shipped with a tamper-evident security seal and internal technical documentation to ensure traceability of the product’s condition at the time of shipment.

Product Safety (GPSR)

Vacuum tubes are electronic components intended exclusively for use in compatible equipment and must be installed in accordance with the equipment manufacturer’s instructions.

Due to their historical or vintage nature, certain technical specifications may be based on original datasheets or equivalent technical documentation when documentation from the specific manufacturer is unavailable.

Use only with suitable equipment. Keep out of reach of children.

Shipping & Returns

Shipping & Returns

We ship worldwide using carefully selected express carriers and protective packaging specifically designed for vacuum tubes.

If you change your mind, you may exercise your right of withdrawal within 14 days of delivery, where applicable under the relevant consumer protection laws. The product must be returned complete with its original packaging and accessories, in the same commercial condition in which it was received. Return shipping costs are the responsibility of the customer.

Every returned item undergoes a technical inspection. Installation, use, tube rolling, or any other handling may reduce the product’s commercial value and may affect the refund amount, in accordance with applicable law.

If you believe the product has a lack of conformity, our laboratory will carry out the necessary inspections and apply the remedies provided by the applicable consumer protection legislation.

For further details, Customers are invited to consult the “Terms and Conditions” and “Refund Policy” sections of our website, or to contact us before placing an order.

Vacuum Tubes Treasures
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📧 info@vacuumtubestreasures.com

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  • ATTENTION PLEASE

    Please understand that the writing on the glass of vintage valves has become very delicate over the years and comes off easily. You must handle them with extreme care to avoid this. Wear and damage to the writing on the valves reduces their market value and causes damage. Please exercise extreme caution.

  • ATTENTION PLEASE

    We wish to inform you that any attempts to manipulate shipping destination information in order to obtain lower shipping rates may be considered fraudulent acts. Please provide accurate information and contact us if you have any concerns. We reserve the right to review and, if necessary, cancel orders that we deem to be in violation of our conditions. Thank you for your understanding and cooperation.