Sovtek 6550WE matched tubes quartet NN381-MQ Sovtek 6550WE matched tubes quartet NN381-MQ €291.51 Includes 22% VATIn stockAdd to cartProduct OverviewSovtek 6550WE matched tubes quartet NN381-MQ Tube Type: 6550 Socket: Octal(8Pin)SpecificationManufacturerSovtekCategoryTAD Selected matched power tubesHigh End HiFi vacuum tubesTube typesPower tubeTube socketOctalSKUNN381-MQIn stockAdd to cartSovtek 12AX7WB ECC83 Russia €35.62 Includes 22% VATIn stockAdd to cartSovtek 5881 / 6L6WGC / 6P3S-E in pair€72.26 Includes 22% VATIn stockAdd to cart6L6WXT+ Sovtek selected tube€43.60 Includes 22% VATIn stockAdd to cartTAD BM2 Bias Master measuring tool with 2 octal probes€172.84 Includes 22% VAT