Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: PRR on November 22, 2020, 07:20:59 pm
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Posted at DIYaudio (https://www.diyaudio.com/forums/tubes-valves/363262-money-buy-opts-pp-gu-50-a-post6421253.html): appears to be V/I oscillograms for a JBL speaker and unspecified transformer tube amp.
JBL 4312 is a 3-way speaker, but the first crossover is 2kHz so little effect on this graph.
The pure-tone lines run a bit high of nominal, a JBL trend. The open ovals are correct when speaker is reactive or resonant. The bottom row is snapshots of real music.