| Speaker ohms [message #20995] |
Thu, 24 July 2014 11:03  |
tthompo
Messages: 5
Registered: July 2014
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Junior Member |
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I have a vintage Kustom 500 bass amp 6-15AB-1.... one cabinet off the 250 head and the other with the power module inside. From age several cones are bad and I'd rather replace than recone. I keep getting conflicting opinions on the speaker ohms....some say 8 others say 16. So I'm looking for some accurate info as well as the best speaker for replacement. Thanks in advance everyone
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| Re: Speaker ohms [message #20996 is a reply to message #20995] |
Thu, 24 July 2014 11:18  |
stevem
Messages: 4773
Registered: June 2004
Location: NY
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Senior Member |
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If you want the most power out of both of them then you want 8 ohm drivers wired in parallel fir a 4 ohm load on the head and the cabinet power unit.
The earlier 200 series heads used cabinets that housed 16 ohm drivers wired for a 8 ohm load, this let a model be sold with two cabinets that when hooked to the head did not load the head with less than a 4 ohm load.
The down side was that when sold with only one 2-15" cab which made for a 8 ohm load it made the head only output some 72 watts of clean power and not 100 like with the 4 ohm load.
Since the 250 series heads when sold with a extra cab like your powered one, they where fitted with 8 plum divers and is why these amps sounded so much puncher than the 200 series amps!
[Updated on: Thu, 24 July 2014 11:21] Report message to a moderator |
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| Re: Speaker ohms [message #21002 is a reply to message #20995] |
Thu, 24 July 2014 16:28 |
chicagobill
Messages: 2006
Registered: April 2003
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Senior Member |
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I don't know what a model 500 bass amp is. I don't know what speaker load it is looking for, but if it was working well with the speaker cab that you have, you can measure the dc resistance of the existing speakers and use that as a guide. The dc resistance will not quite match the 8 or 16 ohm values, but will be good enough to tell what was in there to start with.
Okay, I looked it up and it's a 250 head with a powered cabinet upping the wattage to 500 watts.
[Updated on: Thu, 24 July 2014 16:31] Report message to a moderator |
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| Re: Speaker ohms [message #21004 is a reply to message #21003] |
Thu, 24 July 2014 22:02 |
pleat
Messages: 1454
Registered: June 2004
Location: Belding, Mi
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Senior Member |
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The K250 series 2x15 and 3x15 cabinets that have the silver thread in the grill cloth use 8 ohm speakers.
stevenm is correct that the older K200 series 2x15 and 3x15 cabinets that have the all black grill cloth cabinets use 16 ohms speakers.
pleat
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