If brightness is a problem and you want a bit of warmth you might try JJ 6922's. They don't get great press (JJ in general). They aren't NOS either, but they are inexpensive. I used them for some years in both a pre-amp and CDP with great success. FWIW, they aren't noisy either. Of all of the new production tubes they get my vote if 'brightness' is an issue.
|
I find that AI can be good for a starting point with sound characteristics. It often can point in the right direction. I’d recommend trying your own searches. But here is the results of a quick one I performed.
The sonic characteristics of 6DJ8/6922/7308 tubes in preamplifiers are known for their warmth, lushness, and a natural, slightly rounded sound signature, often described as having a "sweet" and "silky" quality, particularly in the midrange and lower regions.
Here’s a more detailed breakdown:
-
6DJ8/6922/7308:
These tubes are known for their ability to deliver a clear presentation of the entire frequency spectrum, with a focus on the upper mid-range and extended highs, sometimes referred to as "air" or "transparency".
-
6DJ8/6922/7308:
They are often praised for their ability to reveal subtle details in the music, contributing to a more immersive and 3D soundstage.
-
6DJ8/6922/7308:
Some tube brands, like Mullard, are known for their relaxed and extended sound, while others, like Telefunken, are praised for their tonal coherence and refined treble.
-
6N1P:
This tube is a Russian equivalent of the 6922/6DJ8, and is known for its similar sonic characteristics, including a warm, slightly rounded sound.
-
6AQ8/E88CC:
This tube is another name for the 6922/6DJ8, and shares the same sonic qualities.
-
7308:
This tube is considered a higher-tier, more sought-after version of the 6922/6DJ8, known for its exceptional quality and sound.
-
NOS (New Old Stock) Tubes:
Tubes from manufacturers like Telefunken, Siemens, Valvo, and others are known for their impressive "air" at the top end, a large soundstage, and a ruler-flat midrange.
-
Amperex, Philips, Mazda:
These tubes are known for a clean, airy top end, nice midrange warmth, and accurate bass, offering a good balance of sonic qualities.
-
Mullard, Genalex, Brimar:
These tubes are known for their sweet warmth in the midrange and lower regions, with a silky and pleasant top end.
This is too open a search. They often get better as you get more specific.
|
Could also be the KT150's IMO they can be overly bright tubes and IMO not a great match with Klipsch. pobably way more power then you need as well.
JJ's are not the tube i'd go with if your looking for a warmer sound.
you really need to look at a SET with the Corwall 4's I have two friends with them and both have, over time, migrated to SET's like 300b's, 804's etc and similar.
|
Many, many thanks to all of you for these excellent insights and suggestions. I appreciate the ideas. Frankly, I am going to have a blast pursuing the recommendations you've shared. Thanks again, everyone.
|
You will get more mileage by replacing the rather pedestrian coupling caps.
|
