For sale is a Matched Quad Sylvania NOS/NIB JAN 5814/12au7/ECC82 Gray plates tubes. Made in the US, 1977

Same date codes.

Tests very strong at NEW level and perfectly matched.

Test Results (Western Electric KS-15874-L2, min: 50):

Tube 1: 84/84

Tube 2: 83/85

Tube 3: 84/84

Tube 4: 82/83

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Welcome to Tube Maze Store

Here you will find a wide selection of NOS and reissue tubes. 

We've been in business since 2012 with great reviews on Ebay, so buy with assurance that you will get a great product and if you are not happy with your purchase we will take it back and refund you full amount - no fuss, no hassle!

We test and match all tubes before shipping on many available testers - Amplitrex AT1000, Hickok 539c, MaxiPreamp, MaxiMatcher, MaxiBurn. All tubes are also tested for noise and microphonics.