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Preamp Rectifier Tube Confusion

I have a Primaluna Prologue 3 which uses 5AR4 rectifier tubes which id like to roll. I’m looking at ShuGuang WE274B tubes which list as replacements for 5AR4 / 5U4G / 274B. 
However, the Primaluna manual lists compatible tubes as: GZ34, CV1377, 5V4G, 5T4, 5Y3 and Upscale Audio also list the Philips 5R4GYS.

Any idea if the ShuGuang would work?
jl1ny
jl1ny's avatar
jl1ny OP
419 posts
 
Philips 5R4GYS in the house! Beautiful glass...haven’t had time to give them a critical listen.

https://freeimage.host/i/2oG08B
jjss49's avatar
jjss49
6,612 posts
 
@jl1ny

just don't let the eyes fool the ears

bling and good sound are separate departments, need separation of powers  :)
jl1ny's avatar
jl1ny OP
419 posts
 
@jjss49

I have my 3 favorite recording’s that are superb at demonstrating vocals, soundstage and separation. They also do the magic act and make the KEF Q150’s disappear...if I can’t hear a difference then I’ll chalk up the 5R4GYS to pure aesthetics. 🤷🏼‍♂️
norah jones: little room
roger waters: what God wants
chris jones: when your gone
goose
731 posts
 
Just save yourself a bunch of time and grief by contacting Andy Bowman at Vintage Tube Service to get specific guidance.  I only deal with Andy on my tube purchases and he knows what he is doing at a fair price.
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