@lewm @billstevenson
There’s definitely a difference. And it isn’t small.
With the Siemens 6922 the sound is bigger and warmer without the sibilance (albeit very minor) I noticed on female vocals with the EH tubes.
Dire Straits “Calling Elvis” from On Every Street album sounded bigger than ever with the drums and the bass laying a massive foundation. The drums hitting harder and weightier.
Took several hours for the tubes to settle. At first they were a bit tipped up in treble. Once warmed up…Biggest delta in bass, overall warmth of the presentation and size and weight of instruments. Vocals are honey. No noise. Dead silent by the way, just like the EH.
Next up is the NOS Russian 6H23P EB.

