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SYLVANIA

12BH7A NOS NIB Sylvania Gray Plates Halo Getter Matched Pair Tubes USA 1975

12BH7A NOS NIB Sylvania Gray Plates Halo Getter Matched Pair Tubes USA 1975

Regular price ₩149,000 KRW
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12BH7 A SYLVANIA NOS NIB Gray Plates Halo Getter Matched Pair Tubes Made in USA '75

Sound Description:

The 12BH7A SYLVANIA , with gray plates and ring getter , produced in the USA in the 1970s, is a solid and musical tube, renowned for its natural tonal quality and ability to maintain a balanced response even in high-end audio contexts.
In this matched version, it offers a smooth and harmonious sound reproduction, perfect for hi-fi systems that favour tonal balance and dynamic coherence.

Bass : dry and well-controlled, with a measured extension that supports the system without weighing it down. The bass is tight, precise, and free of bloat, providing a solid and transparent foundation.

Mids : Smooth and natural, with a slightly warm sound texture that enriches vocals and acoustic instruments without ever becoming overbearing. Intelligibility is high, while maintaining an airy and refined presence.

Highs : Silky and smooth, with good extension without ever becoming aggressive. The high range integrates perfectly with the rest of the spectrum, offering controlled brilliance and a lack of fatigue even at high volumes.

Dynamics : fluid and balanced, with the ability to follow changes in intensity naturally and without compression. The musical output always maintains a prompt and homogeneous response.

Soundstage : Wide and well-constructed, with a coherent and focused soundstage. The stereo image is stable, deep, and precise, enhancing the spatial arrangement of the instruments.

This pair of SYLVANIA 12BH7A represents an ideal choice for those who want a double triode capable of combining naturalness, musicality and reliability, both in high-quality hi-fi configurations and as a driver stage or phase inverter in prestige valve amplifiers.

🎧 Use in Headphone Amplifiers and Hi-Fi Driver Stages

The SYLVANIA 12BH7A excels in hi-fi applications and high-end headphone amplifiers, where tonal balance and naturalness of output are crucial. In configurations based on single-ended or push-pull circuits, this tube contributes to a richly nuanced sound, with full mids, tight bass and never fatiguing highs, particularly suited to driving reference headphones such as the Sennheiser HD600 , Audeze LCD-2 or Focal Clear , offering depth, transparency and authentic musicality.

🎯 Note for audiophiles :
Perfect for those looking for a three-dimensional and natural reproduction, capable of enhancing acoustic music as well as jazz and vocal genres, with a fluid, refined and never artificial timbre.


Test Results:

Valve tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V ; Vg = -10.5V
  • Average 100%: Gm = 3.1 ; Ia = 11.5 mA
  • Test Result: VERY STRONG

Valve 1:

  • Section 1: Gm = 2.7 ; Ia = 8.6 mA
  • Section 2: Gm = 2.8 ; Ia = 9.6 mA

Valve 2:

  • Section 1: Gm = 2.9 ; Ia = 10.4 mA
  • Section 2: Gm = 2.6 ; Ia = 8.1 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and approved for use in hi-fi and guitar amplifiers. Not recommended for the V1 position in high-sensitivity guitar amplifiers.
  • Output Quality: Excellent – ​​Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in original box.
  • Functionality: Fully functional.
  • Cosmetic condition: Excellent – ​​Excellently preserved lettering, minimal signs of wear. See photos for details.
  • Manufacturing Code: 7552 → RMA/EIA Open Date Code → manufactured week 52 of 1975

Burglar-Resistant 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 in protective packaging to ensure safety during transportation.
We use recycled and recyclable paper for packaging, and brown tape ECO-KRAFT , eco-friendly and solvent-free.


Important Notes:

This tube, manufactured 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:

While 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:

  • Attention: 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.