Did anyone read this post? The gentleman is asking about a preamp and CD player to use with a SS amp and the answers concern PP vs. single ended. This is misinformation at its worst. Line level devices, as opposed to power amps, operate tubes in single ended configuration, only valve power amps, which the gentleman has said that he is not considering, operate either as single ended or push pull, so the issue is moot. To answer the questions, the tubes that these components use are very inexpensive, on the order of $20.00 each. They are in current production in a number of countries in the Eastern Block and Asia. Finer new versions of these same tubes made in domestic and European factories decades ago are also plentiful, but for a bit more cash. Generally, preamps do not need any maintenance or biasing. It is very easy to change tubes as they are designed to be changed. No capacitors need be changed when the tubes are changed although valve preamps operate at higher rail votages than SS and may have more problems long term. Unlike SS where failures are often catastrophic, problems in tube gear can generally be remedied rather easily. The Sonic Frontiers gear may pose a problem in that the company was sold to Paradigm which ceased production of the high end tube units. The SF gear is generally more complex in it's power supplies than comparable products. Tube life varies, always have a spare set around. Hissing or popping noises usually signal that it's time to change tubes. You should get a couple of years use easy. Some tubes can last a decade or more. I say go for it.
Advice for newbie on Tube gear
I'm seriously condsidering getting into tubes (valves here in UK).
I saw & heard them once at a hifi show & have been fantasising ever since.
I'm a bit tech illiterate.
I've been offered Sonic Frontiers SFL-2 preamp + SFCD-1 CD player (240V) for US$2200. Cond is v.good, tubes are about 18mths old. I'll probably buy an ss power amp also(below $700 used).
I'd appreciate any advice on what I'm letting myself in for :
How difficult is it to find & change tubes , How will I know when tubes need to be changed , How much will it cost , What else will I need to do (biasing???, capacitor replacing...).
Are tube SF units low maintenance? I don't really have much spare time ,and am easily confused by techy things.
My system : nothing left apart from AQ Diamond X3 i/c's, AQ Sterling spkr cable, and an old pair of excellent highly sensitive (96db), hi-end(ish) French speakers - Helius Sirius II (only a few made in the '70s/'80s).
I saw & heard them once at a hifi show & have been fantasising ever since.
I'm a bit tech illiterate.
I've been offered Sonic Frontiers SFL-2 preamp + SFCD-1 CD player (240V) for US$2200. Cond is v.good, tubes are about 18mths old. I'll probably buy an ss power amp also(below $700 used).
I'd appreciate any advice on what I'm letting myself in for :
How difficult is it to find & change tubes , How will I know when tubes need to be changed , How much will it cost , What else will I need to do (biasing???, capacitor replacing...).
Are tube SF units low maintenance? I don't really have much spare time ,and am easily confused by techy things.
My system : nothing left apart from AQ Diamond X3 i/c's, AQ Sterling spkr cable, and an old pair of excellent highly sensitive (96db), hi-end(ish) French speakers - Helius Sirius II (only a few made in the '70s/'80s).
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- 10 posts total
- 10 posts total

