@charles1dad ditto. I was under the same impression. Inquiring minds want to know what backs up that statement.
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In all candor I don’t believe there is a backing up statement. Certainly due to personal taste preference one might prefer a 45 /2A3, nothing unusual there. By the same token other listeners may prefer the 300b. Normal variance depending on numerous audio system factors.
Here's some food for thought: I think this a question for Cube Audio with respect to the V1 and they will see it as a mute point. Why did Cube Audio have a list of compatible amplifiers when they offered the V1s? You don't see a recommended list for the V2s. Why did the Mono & Stereo Review state: "For tube amplifiers, Cube Audio recommends such designs based on 2A3, Px4, 45 tubes" and not 2A3, Px4, 45, and 300B tubes. Have you ever seen Cube or Refined Audio specifically demo with 300B based amps? I remember addressing this exact question at some point in my search.
Seems like considerable conjecture in all honesty. I can’t think of any logical reason why a 300b amplifier would not be a fine choice. Certainly no technical reason. I’d love a comment directly from Cube Audio on this topic. I would be very surprised if they said there is some reason to avoid the 300b. Again, to me it appears to be a terrific pairing.
@mikeg Mike, in addition to simple preference, perhaps the industry association for shows, etc. may have been a factor. Tektron Audio and Cube Audio in Europe. Refined Audio being a Pass Labs dealer factors for the US shows.
If Grzegorz has reasons for not recommending a 300B or for putting it lower on Cube’s recommended list...I’d love to know the reasons.
Here is a screenshot of the recommended amplifiers (I believe this was the list when the V1 was in existence) from Cube Audio.
A number of 300B amps are in the "Amplifiers that work well with Cube Audio speakers" list.
[Note: I was not able to re-format the font size, etc. below] In other words, I'm not shouting!!! 😊
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