Update: Over the past year, I’ve rolled several tubes in my preamp. The Psvane 12au7-TII have it all. Quiet, clean & dynamic - with sweet/smooth highs, solid midrange body and deep, punchy bass. (No bloated midrange of the Mullard 8136) The search is over. Great sounding new production tubes without the outrageous prices of NOS.
12au7 rolling - Radiotechnique v Mullard v ?
After much tweaking, I’m fairly pleased with my system which includes a tube preamp w/solid state amp (100% Class A). The tube preamp (Response Audio Bellamax) with two La Radiotechniques 12AU7/WA (6189) offers great tone, dynamics, resolution and a tight bass. I’m wondering if it’s possible to preserve those traits and add a bit more body to the vocals. I’m considering purchasing Mullard M8136’s or CV4003’s but I’m wondering if the bass will become bloated or lose dyanamics. Has anybody compared Radiotechiques (14mm plate) with the Mullards?