1 low noise tube) CV4003=M8136=12AU7 Mullard branded Philips box plates NOS 1975

1 section) 8.8ma Gm=2000

1 section) 8.2ma Gm=1900

Tested on Amplitrex

Good Ma range 8-10ma

Good Gm range 1800-2200

great midrange and good bass 

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