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Questions about power tube matching?
Do you need a matched quad? |
 | | We match tubes to be within 5% of measured plate current (that is, the tubes won't differ from each other by more than 5%, or 1 milliamp in 20). |
| | The Perfect Pair number is the actual "plate current" (see question 4) that we measured, using our digital matcher with a regulated power supply. |
| | Power tubes require matching because the way they amplify sound waves can create exceptionally bad sound if they are poorly matched, but pre-amp tubes generally aren't used this way and so matching them is unnecessary. |
| thetubestore.com /powertubeinfo.html (1313 words) |
