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Kustom250 head + 2 cab 3x15 JBL [message #17331] Mon, 30 July 2012 17:50 Go to next message
geddylee2112 is currently offline  geddylee2112
Messages: 5
Registered: July 2012
Location: Montréal
Junior Member
Hello im selling my Kustom kit ! its the kustom 250 head and the 2 matching cabs 3x15 jbl , one as the power amp in and the other is a straight 3x15 i want 1200$ for it . Im at Montréal québec . thanks!
Re: Kustom250 head + 2 cab 3x15 JBL [message #17332 is a reply to message #17331] Mon, 30 July 2012 17:52 Go to previous messageGo to next message
geddylee2112 is currently offline  geddylee2112
Messages: 5
Registered: July 2012
Location: Montréal
Junior Member
they are mint condition with the original leather cover Kustom . ( i dont know how to post a pic . ) thanks !
Re: Kustom250 head + 2 cab 3x15 JBL [message #17333 is a reply to message #17332] Mon, 30 July 2012 19:26 Go to previous messageGo to next message
pleat is currently offline  pleat
Messages: 1410
Registered: June 2004
Location: Belding, Mi
Senior Member
You may want to include what color and condition. Are the JBL's D140's and original to the cabinets?
pleat
Re: Kustom250 head + 2 cab 3x15 JBL [message #17334 is a reply to message #17331] Mon, 30 July 2012 19:42 Go to previous messageGo to next message
geddylee2112 is currently offline  geddylee2112
Messages: 5
Registered: July 2012
Location: Montréal
Junior Member
Its the black and the original jbl im the second owner i dont know everything about kustom..
Re: Kustom250 head + 2 cab 3x15 JBL [message #27439 is a reply to message #17331] Mon, 15 July 2019 08:02 Go to previous messageGo to next message
johnnysynth is currently offline  johnnysynth
Messages: 32
Registered: June 2018
Member
250 what 1, 2 or 4?
The six JBL's tell's me it's a bass rig?
Re: Kustom250 head + 2 cab 3x15 JBL [message #27440 is a reply to message #17331] Wed, 17 July 2019 08:45 Go to previous messageGo to next message
rodak
Messages: 446
Registered: October 2001
Location: Georgia
Senior Member
Six JBLs? That's a total of about 2.7 ohms impedance. Can the K250 handle that kind of load? Very few amps are rated for less than 4 ohms.



www.combo-organ.com
Re: Kustom250 head + 2 cab 3x15 JBL [message #27441 is a reply to message #17331] Wed, 17 July 2019 09:21 Go to previous messageGo to next message
sunnhead is currently offline  sunnhead
Messages: 202
Registered: June 2010
Location: Minnesota
Senior Member

the one cabinet has the power module. Sounds pretty cool to bad its in Canada!
Re: Kustom250 head + 2 cab 3x15 JBL [message #27442 is a reply to message #27440] Wed, 17 July 2019 10:09 Go to previous messageGo to next message
johnnysynth is currently offline  johnnysynth
Messages: 32
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. . .
Re: Kustom250 head + 2 cab 3x15 JBL [message #27443 is a reply to message #17331] Wed, 17 July 2019 10:42 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4227
Registered: June 2004
Location: NY
Senior Member
In any 3 speaker cabinet that Kustom ever made be it 3-12" or 3-15" they used 16 ohm speakers in parallel for a total impeadance of 5.3 ohms .
The K250 heads and the cabinet power modules are made to output there max power into a 4 ohm load and 5.3 ohms is fine.

All Kustom amps from 100 watts on up and from the B series on have a thermal circuit breaker in them that turns the amp off the the output stage gets above the danger level of 182 degrees F as what might take place if you where playing the amp loud hooked up to a impeadance that was too low.

[Updated on: Wed, 17 July 2019 10:51]

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Re: Kustom250 head + 2 cab 3x15 JBL [message #27444 is a reply to message #17331] Wed, 17 July 2019 16:47 Go to previous messageGo to next message
rodak
Messages: 446
Registered: October 2001
Location: Georgia
Senior Member
Ok, I see - I missed the part about the power module in one of the cabs. That's pretty cool, like an Acoustic 360!

www.combo-organ.com
Re: Kustom250 head + 2 cab 3x15 JBL [message #27447 is a reply to message #27444] Wed, 17 July 2019 23:00 Go to previous messageGo to next message
pleat is currently offline  pleat
Messages: 1410
Registered: June 2004
Location: Belding, Mi
Senior Member
Stevenm is correct in Kustom using 16 ohm speakers in the K100, K200 and K400 series amps.
I have a Kustom chart that says that in the slant metal face amps Kustom used 8 ohm speakers wired in parallel for a 2.7 ohm load. In the K250/500 series.

pleat
Re: Kustom250 head + 2 cab 3x15 JBL [message #27448 is a reply to message #17331] Thu, 18 July 2019 14:06 Go to previous messageGo to next message
rodak
Messages: 446
Registered: October 2001
Location: Georgia
Senior Member
Wow! Were there many reports of fried amps from pushing a load that low? Or can a K250/500 handle it?

www.combo-organ.com
Re: Kustom250 head + 2 cab 3x15 JBL [message #27452 is a reply to message #27448] Sun, 21 July 2019 15:05 Go to previous message
pleat is currently offline  pleat
Messages: 1410
Registered: June 2004
Location: Belding, Mi
Senior Member
Yes, one the K250 series, the washer on the speaker jack states 3ohms-4ohms. The Slant face K150 series still used 16 ohm speakers for a 8 ohm load to the head.

pleat
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