NOS Hytron VT-25 10 tubes Made in WWII these USA VT-25 tubes are recommended for: Audio Note monoblock amplifiers: Kegon, Gaku-On, Baransu, Kageki balanced and others. At Tubes Unlimited we had the opportunity to roll many pairs through a set of Audio Note Kegon monoblock amplifiers and we discovered the perfect range of current (mA)draw which resulted in the widest open sound stage! These are an excellent investment for your system. All pieces are thoroughly tested, matched, and screened on our Amplitrex AT-1000 testing system, and then additionally tested for gas, shorts, leakage, and transconductance on our computerized and calibrated Hickok 118B. If you own an Audio Note monoblock amp, please let us know and we will provide pairs within the sweet spot range! We have a very limited supply of these Hytron vt-25/10 pieces of these in stock. Hytron 10 VT-25 are $119.99 per tube, matched pairs just $239.99 per pair. This is a suitable replacement for any Type 10 = 10Y = VT-25 = UX-210= CX-310 = 210T Power Triode tube type.