| Brand | Unbranded |
|---|---|
| Type | Vacuum Tube |
| UPC | NA |
Check the listing for details. 2 Premium 6K4 Type Premium Vacuum Tubes For Preamp Amplifier Tube Replacement. Condition: New. Listed at 16.85 USD. These 6K4 tubes show you the difference in natural voice reproduction and simple musical. Superior in natural voice and musical reproduction. Hear the difference, enjoy your music.
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