Tube Sound Question

I mainly let my head choose everything up to the power amp, so Benchmark Media for DAC and their new linestage for the quality of the signal.  Then for amp and speakers, I trust my heart for what final sound I love, which for me is a great tube amp and speakers that put the performance in the room without sibilance.

Since the tube sound is mostly attributed to its high output impedance (which is why they are described as warm, as most speakers are ported). So, a tube amp is magnitudes more influential in coloration than a tube preamp.

When I bought a Dennis Had "Firebottle" single ended 12wpc tube power amp it was one of the most significant system changes I’d had over many years...including owning other tube power amps...used it initially with a very clean dual mono SS preamp and it sounded astonishingly good, but curiosity meant I had to try a tube preamp and wound up with a Schiit Freya, which when using the tube section, is even better. Not WAY better, it just adds that little extra detail that tubes seem so good at providing. I’m definitely in the tube power amp school of thought simply based on my experience, but tube pre to SS power might fit others just fine.

Since the tube sound is mostly attributed to its high output impedance (which is why they are described as warm, as most speakers are ported). So, a tube amp is magnitudes more influential in coloration than a tube preamp.

This statement is incorrect.

'Tube' sound comes from a lack of higher ordered harmonic distortion. Quite often tube sound comes from more 2nd harmonic distortion as well. Combined, you get smoother sound on top because the ear perceives higher ordered harmonics as harshness and brightness (the transistor 'sound') and a richer sound on account of the 2nd (if present).

Its possible to design tube gear to not make the 2nd harmonic (by making the circuit fully differential and balanced).


The higher output impedance that is common with tubes has little to do with this.

In a nutshell, because they make less higher ordered harmonic distortion, its easier to build tube circuits that more closely adhere to the human ear/brain hearing perceptual rules since it is distortion that causes transistor circuits to be brighter. Of course its a bit more complicated than that, but if you want what the 'tube sound' is all about then you're better off with both a tube amp and preamp.

@ atmasphere
Somewhat of a side question...if it is 2nd order harmonics and less odd order harmonics that contribute to the sense of smoothness....what aspect of tubes...amp or preamp...is it that contributes to the increased sense of spaciousness?