PX-25 or PX-4

Tubes Asylum

Questions about tubes and gear that glows. FAQ

I am currently running a Sophia Royal Princess 300B in my Eddie Current Balancing Act. This amp will also accept a PX-4 at the flip of a switch or a PX-25 with the addition of a couple of resistors.

I understand the Osram globe PX-25 to have silky highs, beautiful mids, and dynamic bass. The tube is somewhat difficult to source, however, and is expensive for something with no guarantee. Some have tried the KR PX25 in this amp and found it to be lean and nothing special. Does anyone have experience with the Full Music or Sophia PX25?

Alternatively, I understand the KR PX-4 works well with this amp but the tube has serious quality control issues. There is an AVVT PX4 but I don't know how it sounds compared to the KR tube. Has anyone heard the 2 and be willing to share an opinion?

In general, what can I expect the sonic differences to be between the Px4 and the PX25? I am looking for realistic highs, beautiful mids and strong dynamic bass. I value soundstage and instrument separation. Most of all, I look for micro dynamics which make the music sound real.

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Parts Connexion

Topic - PX-25 or PX-4 - setamp 08:05:41 01/19/15 (4)

RE: PX-25 or PX-4 - Al Noakes 10:41:54 01/19/15 (2)

RE: PX-25 or PX-4 - setamp 12:13:02 01/19/15 (1)

RE: PX-25 or PX-4 - Al Noakes 12:27:50 01/19/15 (0)

RE: PX-25 or PX-4 - andy evans 08:57:36 01/19/15 (0)

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