6922 recommendations for ARC PH7


Hi folks,

Looking to roll the tubes in my Audio Research PH7 phono pre. Looking for a recommendation for a 6299 that will extend the top end, midrange and give me a little more airiness without sacrificing the bottom end (Sorta what we are all looking for right lol) 

the  tubes I’m currently using are 4 Electro-Harmonix which sound good but they are a little laid back on the top. Very neutral sound which is a good thing, but want to try something new. My main room is not a very lively room as it is. However after testing the ARC in my living room system which is much more lively room I still am not getting the result I’m after. Dont get me wrong. Not complaining about the sound of the pre at all. I have been wanting to roll the tubes in this piece for some time now if not more than to just experiment with. Just got the itch to try something new. 
Thanks 

-Keith
barnettk

Showing 2 responses by mijostyn

barnettk, I think you meant 0.4 and 0.5 mV.  With 57dB you would need to install transformers for tubes 0.2 mv or less. ARC can be strange that way. 57 dB is too much gain for most high output cartridges but not enough for all MC cartridges. My PH3 SE has 54 dB. It is quiet enough for a cartridge with 0.5 mV output but it really sings with high output cartridges in the 3 mV region. I have a Soundsmith "Voice" ready to go as soon as Sota gets to building my turntable. I do have Sowter transformers installed inside the PH3 for low impedance MC cartridges but right now I'm into high output cartridges which IMHO are a much better value and in some ways better than MC cartridges. You could also install transformers in the PH7. In the future I intend on getting a current mode phono stage and a very low impedance MC cartridge. My understanding is that this combination results in a very dynamic sound challenging the high output cartridges in that regard. 
Where are you getting the Phillips from. Are they tested and graded?
I generally only use RAM Labs and Upscale Audio because they test and grade all their tubes which I find very reassuring. I have always purchased the highest grades and have always gotten wonderful tubes.
Very important for phono stages!  
Hi Keith,
I use an ARC PH3 SE. These are the best but you will not like the price 
https://upscaleaudio.com/collections/preamp-tubes/products/telefunken-cca
These are much more reasonable https://upscaleaudio.com/collections/preamp-tubes/products/electro-harmonix-6922-gold-pin?variant=29...
They are the gold pin Electro-Harmonix. I have the "Kevin's Stash" grade and they have a very clean top end and are also extremely quiet.
I may try these, https://upscaleaudio.com/collections/preamp-tubes/products/siemens-a-frame-e88cc-6922?variant=295304... Fortunately, my unit uses only three tubes. The "Kevin's Stash" grade is $160 per. I continue to argue with myself.
I really think you will be very pleased with the E-H Gold/