Brimar vs Mullard cv4003/12AU7

A Mullard in the right circuit can sound holographic.

Hello, Mullard Man here.  No comparison, (in the right circuit).  The Mullards are hard to beat.

I've not tried the Brimar's but immediately chose the Siemens E82cc/12au7 over two different Mullard's, including the CV4003.  I also preferred the Siemens over the Radiotechnique 12au7.

Call Andy at Vintage Tube Services and ask his opinion on the Brimars.

Old thread, but I’ve tried both in a rogue sphinx v2. For me, the mullard’s sounded better...more holographic. They both have good dynamic range and are quiet in my system, but after using the Brimars for a while, I switched back to the Mullards. I’m thinking it might be system dependent though

@bradbort , yes it's system dependent. I'll add that it's component dependent.
I used Mullard longplate square getters from the 1950's for years in a preamp. Also used a Mullard CV4004 as an input tube in my amp.
When I changed to a new amp, I needed more clarity and extension, and the Brimars were a better fit.