Timeline for Can turning on an amplifier without a connected load (cab) cause damage?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| May 9, 2017 at 3:30 | comment | added | aron | i killed some valves doing this trick , ileft the amp to warm up for about 15 minutes and heard a bang , and then realized i had disconnected the speaker previously | |
| Oct 21, 2014 at 3:27 | comment | added | supercat | Transistor amplifiers drive more power into low-impedance loads than high-impedance loads, while tubes do the opposite (a short is zero impedance; an open is infinite impedance). Curiously, I seldom see any mention of this phenomenon in discussions of "tube sound", even though the impedance of a typical speaker will vary with frequency, and the way tubes interact with that varying impedance is very different from the way transistors interact. | |
| Sep 9, 2014 at 6:45 | vote | accept | Andrew Cheong | ||
| Sep 7, 2014 at 22:50 | comment | added | Doktor Mayhem♦ | The backline at the festival we played last night did get killed by doing exactly this - the techs clicked it off standby without telling me, and without having a cab attached. The nice red light on the front died instantly, and no noise came out. Needed to get a runner to find a new Marshall 120W head :-( | |
| Sep 7, 2014 at 20:14 | comment | added | Tetsujin | Thank you for that clarification of my long-held 'voodoo' belief, Matt. Most appreciated. | |
| Sep 7, 2014 at 19:42 | history | edited | Matt L. | CC BY-SA 3.0 |
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| Sep 7, 2014 at 19:36 | history | edited | Matt L. | CC BY-SA 3.0 |
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| Sep 7, 2014 at 19:31 | history | answered | Matt L. | CC BY-SA 3.0 |