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Kustom K 300 pa [message #12773]

Thu, 28 January 2010 09:42

Billyerock
Messages: 12
Registered: January 2010
Location: Englewood colorado

Junior Member

[SIZE=2]I have 2 Kustom 302 pa Column cabinets none of the speakers are in it ... can anyone tell what they have or what to

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Re: Kustom K 300 pa [message #12775 is a reply to message #12773]

Thu, 28 January 2010 12:25

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

This is my best educated guess as to the impeadance and wiring of those speakers as the factory made them.
If any one on the board can check up on this please let us know!
Anyway here`s my take on it. Each cabinet house`s 3 8" 8 ohm drivers, and two 12" 16 ohm drivers.
The three 8" drivers are wired in serise.
The two 12" drivers are wired in serise.
Then those two feeds are wire in parallel for a 9.6 ohm load per cabinet, which will place a 4.8 ohm load on the amp when both are connected.

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Re: Kustom K 300 pa [message #12781 is a reply to message #12775]

Sat, 30 January 2010 02:46

Billyerock
Messages: 12
Registered: January 2010
Location: Englewood colorado

Junior Member

thanks for the info on the wiring ... are these 8inch speakers a certain frequency response for the midrange ??? I realize the 2 12 inch are for the low end frequency but I thought maybe the 8 inch had some special frequency rating for the midrange ...

[Updated on: Sat, 30 January 2010 02:47]

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Re: Kustom K 300 pa [message #12787 is a reply to message #12773]

Sat, 30 January 2010 18:44

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

Yes the 8 inchers are probibly more mid range of which eminence makes 2 8" replacement drivers that will work.
Don from this site has passed along to me the orignal wiring schematic.
If you PM me your email I can forward it to you on Monday from work.

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Re: Kustom K 300 pa [message #12794 is a reply to message #12781]

Sun, 31 January 2010 13:12

pleat
Messages: 1452
Registered: June 2004
Location: Belding, Mi

Senior Member

I did send stevenm the actual speaker ohmage and wiring for the 302 columns and kustom used 12 ohm speakers in your cabinet. The 8" speakers were to push the upper mids and highs and the 12's for the lows. No crossover was used in these cabs. The chart shows 6.5 ohms per column. Kustom was using a lot of 12 ohm speakers. Bud brought it to our attention at one of our conventions, which I guess I knew but didn't pay that much attention, since that was going into the slant metal face amp era that I stay away from.
pleat

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Re: Kustom K 300 pa [message #12850 is a reply to message #12773]

Wed, 03 February 2010 07:59

Billyerock
Messages: 12
Registered: January 2010
Location: Englewood colorado

Junior Member

thanks for the info ... I suppose these speakers are availabe any more ... by any chance do you have a model number that I might search the web for???

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Re: Kustom K 300 pa [message #12866 is a reply to message #12773]

Thu, 04 February 2010 06:24

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

It looks like you will have to go with 16 ohm replacement drivers as that is all I could find.
also it looks like you will need to inlarge the speaker cut out in the baffle to take 3 10 inch drivers.
I did a long search and could not find a single 16 ohm 8 inch driver anywhere, only 10 incher`s.
Speaker warehouse carrys a model 10" Veteran driver in 16 ohms for 41 bucks, and a model ET65 12" driver for 69 bucks.
You might try getting on the Orange county speaker site and email them to ask if they have any leads on 16 ohm 8" drivers.

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Re: Kustom K 300 pa [message #12873 is a reply to message #12866]

Thu, 04 February 2010 12:22

LesS
Messages: 477
Registered: December 2002

Senior Member

Hi,
If you are OK with using speakers other than the stock size, then here is what I would do:
Since I believe in using matched speaker sizes and impedance, I would put in four 12 inch speakers - 8 ohms each (or as second choice two 12 inch and two 10 inch). For the 4 speakers in each cabinet - I would do series/parallel wiring (wire each pair in series and the two sets in parallel) for a net of 8 ohms per column. You might not need to enlarge the cutout - you should test it to see if you can hear a difference. I would plug the extra cutout - you can do it in a way that is not very noticeable.
I believe that you would get a bigger sound from four matched speakers than from 5 speakers with different sizes and impedance.
Just my two cents......
-Les S

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Re: Kustom K 300 pa [message #12912 is a reply to message #12850]

Fri, 05 February 2010 19:01

pleat
Messages: 1452
Registered: June 2004
Location: Belding, Mi

Senior Member

www.partsexpress.com has 8" 12 ohm speakers for 11.20 each in lots greater than 4. I didn't bother to check to see if they have 12" 12 ohm speakers in stock. W8-12T 12P 8" Paper Cone Woofer 12 ohm. If they don't have 12 ohm speakers in the 12" I'd suggest getting 16 ohms. Always better to go up than down.
pleat

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Re: Kustom K 300 pa [message #12913 is a reply to message #12873]

Fri, 05 February 2010 19:08

pleat
Messages: 1452
Registered: June 2004
Location: Belding, Mi

Senior Member

The main problem I see in using 10" speakers in place of the 8" speakers are the speaker bolts that would polk holes in the cones unless cut off flush. As easy as the baffle boards are to remove, I'd make two new baffle boards, save the originals and then do 4 matched speaker opening in the new baffle boards, add new grill cloth and re assemble.
pleat

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