(!!!!) (Best Overall Pair) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.6/9.6ma and 9.4/9.8ma) 1% matched (can make a quad with another pair)
$199.99
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1 very low noise pair) CV4003=M8136=12AU7=6189 Mullard UK box plates NOS 1978 rebranded "6189 RTC" 1981 in white boxes (RTC=Radiotechnique, France) 1 section) 9.6/9.6ma Gm=2100/2100 1 section) 9.4/9.8ma Gm=2100/2100 Tested on Amplitrex Good Ma range 8-10ma Good Gm range 1800-2200 great midrange and good bass Low Noise and zero microphonics 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 - Schiit Vali 2
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