Tubes In Preamp Power Supply...or Not?


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Two tube preamps:

The Audio Research Reference 3 has a total of six tubes. Two of those tubes are in the power supply. (2004)

The Audio Research LS27 has a total of two tubes. The power supply is solid state...No tubes in the power supply. (2010)

The LS27, according to Audio Research, outperforms the Ref3.

The LS27 is six years newer, though smaller and 13 pounds lighter.

LS27 tube complement: (2) 6H30 dual triode. (Hybrid JFET/tube audio circuit, solid-state power supply).

Ref3 tube complement: (4) 6H30P dual triodes, plus (1 each) 6L6GC and 6H30P in power supply.

All of the Reference models have tubes in the power supply.

Whereas the LS27 outperforms its bigger, older sibling, what sonic differences do tubes in the power supply make vs. a solid state power supply in a preamp?
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mitch4t

Showing 1 response by lissnr

The tubes vs solid state debate never seems to end, which is certainly ok and serves to keep discussions like this always ongoing...Tubes in general tend to have a more fundamentally natural character to them than solid state. Yes, exceptions are out there and differences in circuit designs as well as component parts will obviously produce huge variations but with all else being somewhat equivalent, tubes make music with a. certain effortlessness. Tube regulated power supplies bring this natural effortless character "earlier" in the music making process and thus seem to have even more impact [ of their personality] towards the final resulting sound... It becomes a deeper breath of musical life to the notes because they remove another bit of once SS territory back into the folds of the vacuum tube. And the final effect ( when done properly) brings an even richer taste of reality to your ears. Yes, it is more expensive and involved but this difference alone can put a tubed component already the first step ahead of an ss in listening appreciation.