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SYLVANIA

12AU7 ECC82 NOS Allen Sylvania Special Edition Matched Quad Tubes – Long Gray Plates Square Getter USA '49

12AU7 ECC82 NOS Allen Sylvania Special Edition Matched Quad Tubes – Long Gray Plates Square Getter USA '49

Regular price €89,90 EUR
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12AU7 ( ECC82 ) NOS ALLEN by SYLVANIA Special Edition Long Gray Plates Square Getter Matched Quad Tubes Made in USA '49

Sound Description:

The 12AU7 (ECC82) ALLEN by SYLVANIA – Special Edition , produced in the United States in 1949 , is a rare and sought-after tube, made for professional level applications and selected with extremely high quality standards.
In this configuration with long grey plates and square getter , the NOS matched quartet stands out for its musically refined, three-dimensional and detail-rich performance, ideal for hi-fi amplifiers, tube preamplifiers and high-transparency dual mono circuits.

Bass : defined, stable and well articulated. The low register is authoritative but always under control, with a precise response and a deep harmonic texture. The low frequencies develop with body, without ever invading, providing a solid and credible base to the soundstage.

Mids : sweet, fluid and musical. The strength of this valve lies precisely in the mid range , where voices and acoustic instruments are returned with warmth, naturalness and transparency . The output is emotional but measured, ideal for those seeking involvement and timbre authenticity.

Highs : clear, bright and controlled. The high range is well extended, with an airy and harsh-free detail. The brightness is always elegant, with well-resolved micro-information and a fine grain that contributes to the overall coherence of the listening.

Dynamics : wide, precise and well distributed. The long plate structure allows for natural management of micro-dynamics , with a prompt but fluid reactivity, capable of accompanying every variation with delicacy and strength at the same time.

Soundstage : wide, immersive and three-dimensional. The stereo scene is stable and well-layered, with an excellent sense of depth and spatiality. The coherent behavior between the quartet valves ensures operational symmetry and timbre homogeneity , enhancing dual mono and balanced configurations.

The matched quartet of 12AU7 ALLEN by SYLVANIA Special Edition – NOS 1949 , with long plates , is the ideal choice for those who want a musical, rich and detailed tube, able to offer tonal refinement, articulation and presence , while maintaining balance and naturalness .

🎧 Use in Headphone Amplifiers and Driver Stages Hi-Fi

The balanced response and low noise floor make this quartet perfect for tube preamps , OTL amplifiers , tube DACs , and high-end stereo driver stages . The excellent midrange performance and harmonic richness make this set ideal for pairing with reference headphones such as the ZMF Verité , Sennheiser HD800S , Audeze LCD-4 , or Focal Utopia , where every micro-variation counts.

🎸 Use in Guitar and Bass Amplifiers

Although conceived for the world of precision audio, this 12AU7 ALLEN by SYLVANIA also performs admirably in boutique guitar amplifiers , in the roles of driver stage or phase inverter , where quick attack, articulation and sonic roundness are required. The transition to saturation is smooth and musical, with a controlled response even at high volumes.

🎯 Note for audiophiles
A valve of absolute class , built to last and play with harmonic intelligence, tonal depth and natural dynamics . The combination of long plates , ALLEN selection and precision matching makes this quartet a reference for those seeking the maximum balance between musicality and detail .


Test Results:

Valve tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V, Vg = -8.5V
  • Average 100%: Gm = 2200 ; Ia = 10.5 mA
  • Test Result: VERY STRONG

Valve 1:

  • Section 1: Gm = 2000 ; Ia = 9.5 mA
  • Section 2: Gm = 2100 ; Ia = 10.5 mA

Valve 2:

  • Section 1: Gm = 2000 ; Ia = 10.0 mA
  • Section 2: Gm = 2100 ; Ia = 10.0 mA

Valve 3:

  • Section 1: Gm = 2000 ; Ia = 9.5 mA
  • Section 2: Gm = 2100 ; Ia = 10.5 mA

Valve 4:

  • Section 1: Gm = 2000 ; Ia = 9.5 mA
  • Section 2: Gm = 2100 ; Ia = 10.2 mA

Additional Tests Performed:

  • Microphonics: Low – Tested and rated for use in hi-fi systems and guitar amplifiers. The white marker on top of the tube indicates that they were selected by the manufacturer for Low Noise & Microphonics
  • Output Quality: Excellent – ​​Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: NOS - New Old Stock - Tested and fully functional. Supplied in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Cosmetic Condition: See photos for details.
  • Manufacturing Code: 944 913 - produced 13th week of 1949

Burglar-Proof Security Seal Policy:

Each product is sealed to ensure quality and integrity.
The right of withdrawal is subject to the tamper-proof seal being kept intact, as required by the Consumer Code.


Eco-friendly packaging:

The valve will be shipped with protected packaging to ensure safety during transportation.
We use recycled and recyclable paper for packaging, and ECO-KRAFT brown adhesive tape, eco-friendly and solvent-free.


Important Notes:

This tube, produced to the standards of the time, is designed to work in equipment compatible with vintage tubes.
It is recommended to follow the safety guidelines to avoid malfunctions or damage.


Security Guarantee:

Although not tested to modern GPSR regulations, this valve has been designed to operate safely under the conditions for which it was manufactured.
We recommend using it with equipment that supports vintage tubes, to avoid the risk of malfunction or damage.


Safety information:

  • Warning: Keep out of reach of children.
  • To be used under adult supervision.
  • Use this product only with equipment designed for vintage tubes.

Condizioni di vendita e sicurezza

Anti-Tamper Security Seal Policy:
Each product is sealed to guarantee quality and integrity.
The right of withdrawal is subject to the seal remaining intact, as provided for by the Consumer Code.

Eco-Friendly Packaging:
The tube will be shipped with protective packaging to ensure safety during transport.
We use recycled and recyclable paper for packaging, along with brown ECO-KRAFT adhesive tape, eco-friendly and solvent-free.

Important Notes:
This tube, manufactured according to the standards of its era, is designed to operate in equipment compatible with vintage tubes.
It is recommended to follow standard safety guidelines to avoid malfunctions or damage.

Safety Assurance:
Although not tested according to modern GPSR regulations, this tube was designed to operate safely under the conditions for which it was manufactured.
We recommend using it only with equipment that supports vintage tubes, in order to avoid risks of malfunction or damage.

Safety Information:
Warning: Keep out of reach of children.
To be used under adult supervision.
Use the product only with equipment designed for vintage tubes.

Shipping & Returns

Shipping & Returns

Shipping Costs

Shipping costs vary depending on the total amount of the items in the cart and are calculated automatically during the checkout process.
All shipments are fully insured. The courier is automatically selected based on destination, weight, and shipment characteristics.

Shipping Times and Delivery

The indicated delivery times are purely indicative.
Any delays, storage issues, or operational changes made by the carrier (for example during peak periods such as holidays) are not attributable to Vacuum Tubes Treasures.

In such cases, we will nevertheless provide the Customer with all necessary support to open claims or assistance requests with the appointed courier.

International Shipping (Non-EU Countries)

For orders shipped to countries outside the European Union, any customs duties, import taxes, or additional charges are the sole responsibility of the recipient.
Vacuum Tubes Treasures has no control over these costs, which may vary from country to country. Customers are therefore advised to contact their local customs authorities prior to placing an order.

Warranty

All products sold by Vacuum Tubes Treasures are covered by the legal warranty of conformity, in accordance with Italian Legislative Decree No. 206/2005 (Consumer Code) and the Italian Civil Code (Articles 1490 et seq.), under the conditions set out below.

Warranty for Vacuum Tubes

Vacuum tubes, being components subject to wear and of vintage or specialized nature, are covered by a specific warranty of 6 (six) months from the date of delivery.
The warranty covers exclusively proven manufacturing or conformity defects that arise during proper use in accordance with technical specifications.

The warranty does not cover:

  • normal wear and tear,
  • subjective sound preferences,
  • use in incompatible equipment,
  • tampering or improper use.

Right of Withdrawal

Purchases made on the Vacuum Tubes Treasures website are governed by Italian regulations on distance contracts (Legislative Decree No. 206/2005).

Consumers have the right to withdraw from the contract within 14 (fourteen) days from the date of receipt of the goods, without providing any reason.

Conditions for Exercising the Right of Withdrawal

The right of withdrawal may be exercised only if:

  • the product has not been used,
  • the product is returned in its original condition,
  • the tamper-evident security seal is intact and not broken.

📌 Returns are not accepted for reasons related to sound preference, tube rolling, or subjective audio evaluation.
As with a music recording, a vacuum tube cannot be returned simply because its sound does not match personal taste.

Effects of Withdrawal

In the event of a valid withdrawal:

  • all payments received, including standard shipping costs, will be refunded,
  • refunds will be issued within 14 days from receipt of the returned goods,
  • the refund may be withheld until the goods have been received and inspected.

Refunds will be made using the same payment method used for the original transaction, unless otherwise agreed.

Return Shipping Costs

Return shipping costs are borne by the Customer, except in cases of:

  • verified defective products,
  • errors attributable to Vacuum Tubes Treasures.

In such cases, return shipping costs will be fully covered by us.

Damaged or Incorrect Items

If the Customer receives a damaged or incorrect item, it must be reported within 5 (five) working days from delivery, by email or telephone, clearly stating the issue.

Uncollected Parcels, Storage, and International Shipments

It is the Customer’s responsibility to monitor the shipment and promptly arrange for collection or customs clearance.
Any costs, delays, or losses resulting from:

  • failure to collect the parcel,
  • prolonged storage,
  • abandonment of the parcel at customs,

do not entitle the Customer to any refund.

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
www.vtt.store | www.vacuumtubestreasures.com
📧 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.