(!!!!) (Best Pair 1974) 12AU7=ECC82 Mullard Philips UK ribbed plates NOS 1974 1-5% matched (9.8/9.4ma and 9.5/10.5ma) (Rogue, Hovland, Audio Note)

1 Matched Pair) 12AU7=ECC82 Mullard Philips ribbed plates NOS 1974  1 tube) 9.8/9.4ma and Gm=2000/1900 (Gf2-B4D3) 1 tube) 9.5/10.5ma and Gm=1900/2100 (Gf2-B4D2)  - smooth midrange, good bass, musical, low noise Matched on Amplitrex Good Gm range 1800-2200 Good Ma range 8-10ma Low Noise and not microphonic   Recommended for - Concert Fidelity CF-080LS Hybrid Line Stage Preamplifier- Ampeg SVP-PRO Bass Preamp- Velleman K4000 kit- Audio Note CD2- ROTH AUDIO MC4 MUSIC COCOON 2009- Eastern Electric Minimax- Hovland