6x4 rectifier question

Just a suggestion: NOS Mullards are typically the best sounding (according to most opinions) and longest lasting rectifiers, extant.                 Especially; those from the Blackburn plant.              ie: http://tctubes.com/Mullard-EZ90-6X4-tube-1.aspx     and:   https://www.tubemonger.com/Mullard_CV493_6X4_MINT_NOS_Blackburn_Gt_Britain_p/1212.htm          Don't know if there's much diff in sound quality/presentation, between the D and square getters, but given the low prices; I'd try both..

Tungsol and Valvo are excellent .

I have found NOS BRIMER 6x4 England EZ90 Black Glass Smoked Vacuum Tube as the best. I am using one in my Eastern Electric Avant preamp. It is a little pricey but worth it. 

@couger4u , on your suggestion, just sought out a Brimer EZ90 from viva tubes for my Lamm, installed and can't express how much I love it. Thank you. Enjoy the music

Thank you for this. I'll order one and compare.

I did some research and I ended up with a Sylvania 6X4 green printing with the triangle logo. $15 and better sounding than the Mullards I had previously in my LL2.1 and LP2.