VintageKustom.com: Comment Board

Re: 3x15 questions [message #27457 is a reply to message #27453]

Tue, 23 July 2019 22:27

WynnD
Messages: 1
Registered: July 2019

Junior Member

Personally didn't know the CTS were 16 ohms. If the replacements are too, they will read about 11 ohms with a ohm-meter. (Disconnected from the others.) 8 ohm speakers read about 6 ohms on a meter. (Difference is because of DC vs AC. Meter only reads DC resistance. 8 ohms is an AC minimum impedence) My 1972 Kustom 250 guitar amp, I replaced all the drivers. it now has a matched set of RCF woofers and a real full crossover and a JBL driver on the cellular horn. I use it for piano and sometimes organ, even outdoors. The amp will drive down to 3 ohms. The woofers are a 4 ohm set and the horn is 16 ohm. And of course the amp is only 125 Watts which runs like a modern 300 watt solid state class D amp today. (And it weighs about 115 pounds total. I've got a ramp style enclosed trailer.) The 3 15" CTS speakers are good for 100 watts safely. My RCFs are rated 350 watts each RMS. You would have trouble finding new speakers rated lower than 300 watts each. Then all you need is a good amplifier. Enjoy.

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