Probably a tube.
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Pick up some gold lion 6922 and it will probably be quiet.... cj pre amps that use the 6922 are tough on them and lesser tubes will get noisy in just a few months.
The Russian 6H23n eb is a great tube thats rugged too but tough to find and overpriced in my opinion. The Gold Lion 6922 is super rugged and sounds great in my opinion