| Model 4-10 Speaker Column [message #22451] |
Tue, 17 February 2015 17:26  |
WillyDon
Messages: 1
Registered: February 2015
Location: Arkansas
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Junior Member |
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I've obtained a model 4-10 speaker column. I believe it is rated at 8 ohms, but not sure. Also need to know the RMS & Peak Wattage. Can anyone help with this one.
Guitar105
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| Re: Model 4-10 Speaker Column [message #22452 is a reply to message #22451] |
Wed, 18 February 2015 06:10  |
stevem
Messages: 4773
Registered: June 2004
Location: NY
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Senior Member |
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Hello and welcome to the place!
Those columns where sold with either the k100 PA heads or the latter k150 units.
I would say it would be fully safe to say that each driver could handle 20 watts rms, the peak power you ask of really does not matter as that is short duration power, it's the constant rms wattage that will take out drivers.
80 watts of rms power thru 4-10s is quite loud though, but note that those drivers where made at a time when a lot of voice coil formers where still being made of treated paper, and you know how beat up 40 year old paper can become no less paper that has been heated and cooled an number of times due to that wattage heat of the coil itself!
Many of these drivers fail due to the glue that was used to retain the coil to the paper former giving up, not due to being over drivin with too much wattage!
If your intent is to use these for cranked up full range sound and not guitar than I would hook up a EQ and roll of from 80 hz on down a bit and give these 40 year old drivers a chance as with out taking them out of the cabinet and checking there suspension there is no easy way to gauge how much they may have been beat up!
[Updated on: Wed, 18 February 2015 06:21] Report message to a moderator |
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| Re: Model 4-10 Speaker Column [message #22457 is a reply to message #22452] |
Wed, 18 February 2015 22:25 |
Iowa Boy
Messages: 767
Registered: June 2014
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Senior Member |
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Since this cabinet was paired with the K-100 or the later K-150, you would need two columns to get your total load on a Kustom amp of that time period to get to your 4 ohm load to achieve maximum wattage output. What this implies, from Stevem's info.....is this column is an 8 ohm cabinet providing they are the original speakers and were wired parallel/series. If you can find any data info on the speaker frame, someone here will be able to tell you exactly what the wattage each speaker was rated at. Welcome aboard as well.
[Updated on: Wed, 18 February 2015 22:31] Report message to a moderator |
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| Re: Model 4-10 Speaker Column [message #24988 is a reply to message #22520] |
Mon, 16 May 2016 13:32 |
stanfield4@hotmail.com
Messages: 5
Registered: May 2016
Location: Modesto, CA
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Junior Member |
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HI, I'm hoping you can shed some light on my new setup, acquired after a lot of searching here in California. I have a mis-matched amp head and speaker cabinet that I'm hoping will not be too unhappy working together for a bass guitar. First, the amp is a K100B-5 2hich I now know is a PA amp, but sounds pretty good with a guitar through it, but the cabinet is a bit of a mystery. It's a 3x10 box but has a quad jr nameplate on the back of it. Weird, I know, just not sure if the amp will be unhappy with the impedance or not. It says it's 4 ohms, but since it's obviously not a quad jr, not sure what it is, and I'f also like to add another cab, maybe an acoustic single 15" that says it's 8 ohms. Just don't want to burn up the amp. I probably wont be gigging the thing, just playing at home mostly.
Thanks, for any help you can give, Mike
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| Re: Model 4-10 Speaker Column [message #24989 is a reply to message #22451] |
Mon, 16 May 2016 15:02 |
stevem
Messages: 4773
Registered: June 2004
Location: NY
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Senior Member |
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If your just playing Bass at home then the single 15 should be all you need, plus it is the impeadance the K100 is needing to be safe and produce its maximum wattage.
In regards to using both the 3-10" cabinet in conjuction with the 15" that will not be possible with out making up a special cable to have both cabinets wired in series .
I do not know what impeadance the speakers are in that 3-10" cab, but I am betting that they are wired in parallel .
If that is the case then if the drivers are 16 ohms the cab will be 5.3 ohms, if they are 8 ohm drivers the cab will be 2.6 ohms and in wiring up the cab with the 15" in series the K100 will be having either a 13.3,ohm load on it , or a 10.6 ohm load.
Either way the amp will be fine, but the amps output power will be 20 to 30% less!
If you have a ohm meter you can check that 3-10" cab to see what it really is,if it has 3 16 ohm drivers tgen the meter will read less than 13 ohms , but greater than 10 ohms if the drivers are 16 ohm, and if the drivers are 8 ohms your meter reading will read less than 10 ohms but greater than 8 ohms.
[Updated on: Mon, 16 May 2016 15:04] Report message to a moderator |
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| Re: Model 4-10 Speaker Column [message #25004 is a reply to message #25002] |
Tue, 17 May 2016 17:34 |
stanfield4@hotmail.com
Messages: 5
Registered: May 2016
Location: Modesto, CA
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Junior Member |
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I used an analog meter and zeroed the reading so 0 ohms when leads were together. I just wasn't sure where exactly on the cabinet jack to stick the leads then wasnt sure if the cord would add much resistance to the reading. Just a six foot cord so I didn't think so. If it's accurate at the core then maybe the 3x10 might be ok with the k100B5. I need to take the back off i guess and check what speakers are in there and the way they're wired. So many screws back there!
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