1 low noise tube) 5814A GE "5 STAR" with "O" getter halo 1963 (best 12AU7 SUB) 

1 section) 10ma Gm=2100

1 section) 14ma Gm=2400

Good Ma range 8-10ma

Good Gm range 1800-2200

Recommended for

- Woo Audio WA4 headphone amp

- Bottlehead Crack

- Bottlehead Foreplay

- CJ PV12

- Jadis amp

- Unison Research Unico-P 2005

- Einstein preamp

- Head-Direct EF1 Hybrid Headphone Amp 2008