VintageKustom.com: Comment Board

Thu, 31 August 2017 23:45

Iowa Boy
Messages: 767
Registered: June 2014

Senior Member

I have several of these 3-15's cabinets and have been trying to figure a way to get the best use out of them for PA. Since originally they had 16 ohm speakers, the best you could get out of all three speakers was 5.33 ohms. Well that doesn't help you if you have a K-200 or K-300 head, or even most amp heads with a 4 ohm total load.

I did come across a wiring diagraph of 2-8 ohm 15's wired in series and then a 16 ohm 15 inch speaker wired in parallel to the 8 ohms speakers. This now gives you a cabinet with 8 ohms. Now you could use 2 of these 3-15's cabinets with any amp that requires a total load of 4 ohms. What would be the disadvantage of wiring these cabinets like this other than if one of the 8 ohms blows, you loose both for output?

Also, I have 2 cabinets that have sirens in them. I'm assuming that the drivers were 16 ohms? They are the originals but I see no markings to indicate ohms or watts. I would like to get rid of the caps and put in crossovers in place of them but know of no 16 ohm crossovers. Hoping they are 8 ohms but doubt if I could be that lucky. If nothing else, I might have to replace the drivers with 8 ohm ones. Appreciate anyone's thoughts on this.

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