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New Old Stock matched pair of vintage Westinghouse 5687 vacuum tubes with desirable black-plate construction. Both tubes were professionally tested on an Amplitrex tester and produced strong, closely matched results.
Amplitrex GM test results:
Tube 1: 97% / 103%
Tube 2: 102% / 99%
Excellent balance between sections and between tubes. Both come with their original Westinghouse boxes. Ideal for compatible high-end preamplifiers, DAC output stages, driver circuits, and headphone amplifiers.
You will receive the exact tubes and boxes pictured. Carefully packed for safe shipment
