This is the KR Audio 300B Balloon. Delivers 6-12w of pure, Class A power. Sold in matched pairs. KR Audio offers a six month warranty on all tubes from the date they arrive at wholesaler or the date they are installed in an OEM amplifier.
One of the worlds very best 300Bs, upgrade your Diavolo or Harmony Silver to KR Tubes or use these as a replacement for any classic 300B.
Delivery will typically take 2-4 weeks as these are special order. Delivery time is longer during August when KR is closed for Holiday.