This it totally high end audio at it's best value. Yes - it uses 6C33C tubes that were used in the Soviet MIG fighter jets as the tubes are know for much higher voltage levels than the KT90 (better for music). This is Part 1 of my review on best audiophile equipment: the BAT VK80i tube integrated. I love high end audio tube amps to power my horn speakers! Follow our Facebook page for unique Hi-Fi and Audiophile content and discussions. https://www.facebook.com/GreekAudioGeek - My Qobuz playlist: https://open.qobuz.com/playlist/21157104 - Facebook: www.facebook.com/GreekAudioGeek - Instagram: www.instagram.com/greek_audio_geek - Additional system updates on What's Best Forum: www.whatsbestforum.com/forums

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