Siemens -Halske 6922

One of my favorite tubes I rotate these in my pre and phono, not a warm tube but very detailed top to bottom tends to move soundstage frontward. If your system leans to brightness may want to look other NOS options
Dennis

Neutral, accurate, uncolored tubes. Available as E88CC (6922 equivalent), E188CC (7308 equivalent - higher tolerances built to last 10,000 hours) and CCa (select high-tolerance 6922).

As has been said many times, the CCa is the best of the bunch. Expansive sound. Extended highs. Neutral across the frequency band. What else would you expect from a German product? Can be microphonic and/or noisy (go figure considering they are special "select" tubes).

The E88CC I have owned had slightly more emphasized bass than E188CC versions. Both have similar characteristics to the CCa, but once you hear a CCa it's tough to settle for the E88CC or E188CC if you can get past the price objection.

As Dennis said, the highs on all the Siemens tubes can be too much of a good thing. Part of the CCa's magic is that it gets right up to the edge of being bright, yet it resolves all the detail without going too far.

Those highs scare me a tad--the leaning toward brightness part. Another killer tube that is close to the Siemens Cca or Siemens Halske, but maybe a tad mellower on top. Or at the worst: neutral

Hi, I have had experience with Siemens tubes. I actually prefer the 7308 version to the 6922. I have found Siemens tubes to be very open, detailed, and transparent. I previously had a CAT SLl MK lll preamp, and the Siemens 7308 was the best sounding and most durable for the phono section.

I have found through extensive tube rolling, that each time I change a component, I find myself trying every version to get the best sound for that particular piece of audio gear.

There are several tube sellers on Agon, and I have found them to be very honest and knowledgable about the NOS tubes that they sell.

I can highly recommend an internet seller that stands behind everything he sells. He even goes as far as accepting returns if the particular tube you purchased doesn't sound right for you piece of gear. You just can't beat that!

Google Brent Jesse Recording. He has a great website that is very easy to negotiate. Prices are fair, and his communication skills are incomparable.