VintageKustom.com: For Sale » Kustom250 head + 2 cab 3x15 JBL

Re: Kustom250 head + 2 cab 3x15 JBL [message #27442 is a reply to message #27440]

Wed, 17 July 2019 10:09

johnnysynth
Messages: 45
Registered: June 2018

Member

Without knowing the model # of the JBL's it's hard to say what the impedance would be individual for each speaker. . .standing alone. . .let alone
what the over-all value would be with all six. Also there's several different ways they could be wired. . .also Kustom put booster amps in some of
the 250 series bringing the power to 500 watts. The head itself puts out 250 watts probably optimized to 4 or 8ohm loads. . .four ohm load being max output
at 250 W. As you increase the load impedance. . .the power goes down. . .ohms law! You're right though about the danger at less than 4 ohms. That could over-heat the
power transistors and cause failure. . .again though. . .without knowing the ohms rating of the JBL's you're poking' in the dark. If this is a factory released rig, then I'm sure
the speaker compliment has been optimized. Judging from the schematics of these rigs that I've seen, I'd say there was some advanced brain power lurking in Chanute Kansas
back in the day. . .

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