• 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
  • 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
  • 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
  • 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
  • 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
  • 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
  • 5881 ( 6L6WGB ) GE Brown Base Side OO Getter Matched Tubes Made in CANADA @ TEST NOS - Vacuum Tubes Treasures
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GE

6L6WGB / 5881 GE Matched Quad Brown Base Side OO Getter Tubes Made in CANADA @ TEST NOS

6L6WGB / 5881 GE Matched Quad Brown Base Side OO Getter Tubes Made in CANADA @ TEST NOS

€229,90 EUR
€229,90 EUR
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6L6WGB / 5881 GE Matched Quad Brown Base Side OO Getter Tubes Made in CANADA @ TEST NOS

Description:

This matched quartet of GE-branded 5881s, produced in Canadian factories in the late 1950s, represents one of the most respected versions of the 6L6WGB. Construction includes black solid plates , dual 'OO'-shaped side getters , and a brown Bakelite base , a hallmark of high-quality military and OEM supplies.
The tubes are used but tested with NOS values , and are perfectly matched to each other for anode current and transconductance, ensuring sonic consistency and technical reliability in every application.

Timbre characteristics:

Bass:
Tight, controlled, and precise. The low end of the 5881 GE is less explosive than that of modern 6L6GCs, but gains in articulation and definition. Perfect for detailed listening or fast, dry bass.

Medium:
Balanced, dynamic, and natural. The mids emerge with fluidity and great coherence, offering a neutral yet never sterile timbre. Vocals are rendered realistically and pleasantly, without artificial coloration.

Highs:
Delicate and well-extended. The highs are silky, well-integrated, and never invasive. Detail is present but not aggressive, with a fine grain that favors prolonged listening.

Dynamics:
Responsive and fluid, with excellent microdynamics. Transient response is natural and precise, making the 5881 ideal for those seeking expressiveness without excess.

Soundstage:
Coherent and three-dimensional. The soundstage opens up with order and depth, offering good separation between instruments and vocals. Excellent positioning of sound sources and well-managed spatiality.

🎧 Use in Push-Pull Stereo Hi-Fi Amplifiers

Ideal for stereo or integrated amplifiers based on push-pull topologies, these GE 5881s are perfect for vintage or modern projects. They offer a balanced and musical sound , with low noise, excellent control and a classic yet refined sonic signature. Particularly suitable for medium-high efficiency systems or for those who prefer a transparent yet warm sound.

🎸 Use in Guitar and Bass Amplifiers

The 5881 GE Canada is a popular choice in Fender blackface and brownface circuits (such as the Bassman, Bandmaster, Pro). They offer progressive harmonic compression , clean, dynamic headroom , and controlled saturation , ideal for jazz, blues, and “American” cleans. They are also excellent for boutique projects seeking a reliable, vintage voice.

🎯 Note for audiophiles and technicians

The 5881 GE Canada offers one of the most balanced and honest sounds of the 6L6 family: musicality, stability, and a natural voice that never tires. The sturdy construction and stable electrical characteristics make this matched quartet ideal for restorations, upgrades, and everyday use in demanding systems.

Test Results:

Tested on AVO VCM 163 Tube tester:
Vf = 6.3V; Va = 300V; Vg2 = 200V; Vg = -12.5V
Average 100% Gm = 5300 ; Ia = 48 mA
TEST RESULT: VERY STRONG

  • Valve 1: Gm = 5350 ; Ia = 54 mA
  • Valve 2: Gm = 5250 ; Ia = 53 mA
  • Valve 3: Gm = 5250 ; Ia = 54 mA
  • Valve 4: Gm = 5200 ; Ia = 57 mA
Additional Tests Performed:
  • Microphonics: Standard. Tested and approved for use in hi-fi and guitar amplifiers.
  • 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.
  • Cosmetic condition: Excellent – Excellently preserved lettering, minimal signs of wear. See photos for details.
  • Manufacturing Code: KT - Manufactured in CANADA in July 1964

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.

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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.