Sovtek 6550WE matched tubes quartet NN381-MQ Sovtek 6550WE matched tubes quartet NN381-MQ €287.40 Includes 21% 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 €35.13 Includes 21% VATIn stockAdd to cartSovtek 5881 / 6L6WGC / 6P3S-E in pair€71.23 Includes 21% VATIn stockAdd to cart6L6WXT+ Sovtek selected tube€42.99 Includes 21% VATIn stockAdd to cartTAD BM2 Bias Master measuring tool with 2 octal probes€171.42 Includes 21% VAT