Well to the extent of 100+ years of audio signal processing (55 years of tubes, 30+ of transistors [still in use God bless] and 30+ years of digital [CD quality mass consumption at the beginning of 90's]) from source to ear I will have to change my vote to rolling chop. @amirm you naughty, naughty boy last one whose so horrible that it influenced my better judgement without paying more attention. This is rudimental and pore design even if SINAD is not horrid for such.In denial of 50+ years of progress to respect integrity of the input signal. Headless panther.
I am loving everything I am hearing on that video, regardless of it being made distorted or saturated, or not. The envelope is great.
I like your point about "stacking". I've asked tubophiles how may layers of tube equipment, (presumably generating 2nd order HD(, do you need -- tube phono and/or DAC; tube preamp, tube amplifier? Some say as many as possible .I’m no sure that harmonic distorsion is a harmonic experience the term is loaded with positive values .
When you get a THD it’s always overtones that bunch up higher in frequency? I’m not sure that will sound good on all music ? Especially when you stack this components up , add this to the tube DAC recently tested and even the distortion from the DAC will have distortion
I’m not sure about this 2nd harmonic sounds warm thing . It looks like a one size fits all solution it can’t really work properly ? For all music in all situations.
The safe bet re THD is as low as possible, do no harm to the signal. Then it won’t matter if it’s even or odd harmonies in a falling magnitude etc etc as they are not audible anyway . This would actually work for most people as at least the sound is as it is fro the source . If sounds meh write angry letters to the producers and then use tone controls or eq
Thank you for these informed comments.Only 2nd harm at -55db may well be hard to hear at full power (when used as a pre-amp into a power amp).
As this is a pre-amp the output voltage, in normal listening conditions, will probably not go much beyond 0.5V (peak in music) where distortion will be even lower (guessing -70dB or so) but that hum may be its downfall.
Sometimes moving exposed tubes and open frame designs a bit away helps a bit.
It is an SMPS Douk describes it as:
With Hi-end switching power supply: Input: AC85-265V Output: DC12V / 2A
Indeed weird they did not go through the trouble of using a similar enclosure.
Chances are inside the amp there is an oscillator generating the HV which is then rectified by the tube just for the sake of having a tube rectifier (as some tube guys swear by it).
I wonder how they measured the following spec:
As this would mean distortion would be -90 dB which, even ignoring the hum and noise, probably cannot be reached.
Then again, specs given by certain vendors can not be trusted anyway.
It is a matter of mood...I think the clean tube style in the video is what I would expect with a tube amp. the others change the balance or even "break"the sound.
personaly while I don't think the examples sound bad (well...the first one does for me)I always prefer the clean versions. it just souds more natural to me
It is a matter of mood...
Every musician chooses this or that instrument for a given passage based on a felt need, and while the real thing is the real thing, a distorted one can be pretty nice, even inspiring.
Also, our brains are so capable there is no reason not to enjoy the new sound, removing anything annoying and turning it into fun, up to a point.
I was told adding the sixth note to the basic triad chord and getting acceptance from the people was a matter of decades.
Many tube afficianados believe that the 2nd harmonic is the holy grail. This preamp seems to be well designed for them, whereas many actually have higher 3rd harmonics than second. That is the point I was making. Personally, I'd prefer as little as possible of either.I don't think this is true. odds are more obvious so when wanting a clean sound they are more important to be avoided.
but odd harmonics can also be a goal for saturation. this video shows how diferent type of saturation efects the sound:
can't judge tube effects by how clean the second harmonic is
Is the anything special that tube rectification does in this regard?