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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: After a few years of 2A3 - Craving a 45 tube amp...or even a 300b posted by restock on October 27, 2008 at 23:29:20:
Do you know the output transformer primary impedance on the amps you are using? Especially the Fi and the Verdier?
I ask because, while the 45 can run happily into the same impedance as a 2A3, it will have significantly less damping factor. This will "loosen up" the bass on many speakers, leading to a bit more excursion, and while the Abbys are among the best for tolerating the excursion limits of the 6.5" Fostex drivers, those drivers will always be on the edge unless they are in serious horn cabinets.
If the Fi has impedance taps, which I think it does but I'm not entirely sure, you might try the 4 ohm tap with the 45. This will reduce the maximum power slightly, but will increase the speaker damping factor. That might give you some insight into whether you need more power or greater damping - or at least, lead you to identify the difference.
Incidentally, it's been my experience that circuit design, operating points, transformers and other components, and driver tube selection all have a larger impact on "thick tube-like ... sound" than the choice of output tube. Not of course the complete picture, each tube does have a characteristic of its own, but the rest of the environment can be quite significant.
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Follow Ups
- RE: After a few years of 2A3 - Craving a 45 tube amp...or even a 300b - Paul Joppa 10/28/0800:02:25 10/28/08 (1)
- RE: After a few years of 2A3 - Craving a 45 tube amp...or even a 300b - restock 00:29:13 10/28/08 (0)
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