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I have a 1 18B folded horn cab can I use a 200 amp with? [message #5143]

Thu, 09 December 2004 09:12

Nighttrain1127
Messages: 13
Registered: December 2004
Location: Worcester Ma

Junior Member

I have a 1-18B folded horn cab and a k200 amp can this be used safely with this 3.2 ohm speaker?

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Re: I have a 1 18B folded horn cab can I use a 200 amp with? [message #5144 is a reply to message #5143]

Thu, 09 December 2004 09:18

C4ster
Messages: 686
Registered: June 2001
Location: Mukwonago, WI (Milwaukee...

Senior Member

I am interested in this 3.2 ohm speaker. I know there were some low quality car speakers for sale in the 60's, but I am unaware of an 18" speaker with that impedance. How did you come to that value? Is that the published value or are you testing it with an ohmeter? DC resistance is always less than the AC impedance. If that is the case you have a 4 ohm speaker which would be just fine with a K200.
Conrad

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Re: I have a 1 18B folded horn cab can I use a 200 amp with? [message #5145 is a reply to message #5144]

Thu, 09 December 2004 14:02

LesS
Messages: 477
Registered: December 2002

Senior Member

The rated impedance of the Kustom 1-18B was 3.2 ohms.
So the measured impedance would probably be about 2.4 to 2.7 ohms.
It should be fine with a K200 amp � if it runs hot, put a fan inside � for one amp I put in a 220 volt fan - running at 120v it makes very little noise.
(Keep in mind, too, that you can�t be sure that the cabinet still has the stock speaker � it could have been changed by a prior owner.)

I used a K100 for many gigs with a 4 ohm rated cabinet that measured 2.8 ohms, so a K200 should be fine at that impedance.

-Les S

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