I've had some ongoing noise/hash issues with my Nat Audio Utopia preamp. Stock current production Teslas and Electro-Harmonix tubes are generally quiet, but bland sounding.
I've moved onto Voskhod Rockets and Reflektor Silver Shields 6N23P tubes, and every pair fails within weeks of install re rising levels of noise, an issue w my 101dB/1m efficient Zus.
Bazelio kindly put me onto Brent Jesse who has sent me a couple of 60s and 70s Mullards and Mazdas 6DJ8 tubes.
My Q is re positioning of different tube makes in my preamp. Is it simply a case of experimentation, or do I choose a symmetrical layout left to right?
Ie A-B-B-A or B-A-A-B
I don't really have any schematic on my amp, my dealer and the company are of zero help.
I've moved onto Voskhod Rockets and Reflektor Silver Shields 6N23P tubes, and every pair fails within weeks of install re rising levels of noise, an issue w my 101dB/1m efficient Zus.
Bazelio kindly put me onto Brent Jesse who has sent me a couple of 60s and 70s Mullards and Mazdas 6DJ8 tubes.
My Q is re positioning of different tube makes in my preamp. Is it simply a case of experimentation, or do I choose a symmetrical layout left to right?
Ie A-B-B-A or B-A-A-B
I don't really have any schematic on my amp, my dealer and the company are of zero help.