Emotive sira?

Going from the stock caps to Sonicaps, the sound became less colored, but also a bit leaner and harder sounding. When Fred changed the Sonicaps to the V-Caps, he also did the autoformer volume control. Since I can't say what each would do individually, as a whole the sound became more organic, smoother, transparent, just really better. It's the equivalent to looking out of a window, then opening the window and removing that layer of glass.

Fred hasn't updated his site for long time, but he's still active. He just updated my Circa phono stage. Since he does lots of custom work he may even have other suggestions.

This is the best preamp I’ve owned and I’ve had several

theres more space around instruments and vocals in a harmony are more fleshed out and seperate

its quite amazing!

I had the Sira in my system for a short time but I did do some tube rolling for the input tube. Aside from a Tung Sol 5687, I tried Bendix 6900 and  RCA 7044 tubes. The 7044 is a nice sounding tube, but many were noisy.

In my Epifania I'm using a Brimar 5R4GY/CV717 rectifier and I really like it. I also have used RCA 5R4G, TJ meshplate 274, and the Phillips Holland 5R4GY tubes. I didn't try different rectifiers in the Sira.

So rolling input tubes would be the tube to effect tone not the others?

Oh and the rectifier?