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Help me build my new cab.

GuzBaas

GuzBaas

Oct 10, 2008
749
94
London
#1
Im interested in building a new cab, but I dont really know which should be the specs, I need a some help.

I want it to sound "vintage" with lots of low end, Im thinking about a 15" speaker, maybe a Eminence Legend, (sounds vintage to me).


How big (dimensions)?
which speaker?
Closed or open??

please tell me the smallest (funtional) dimensions! thanks!!

I have a markbass r500
 
#5
GuzBaas said:
HOW BIG IS THAT?
2 cubit feet is 2'x2'x'2.... thats HUGE!!
Click to expand...
one cubic foot is 12"x12"x12"=1728 cubic inches
so 2 cubic feet would be 3456 cubic inches.
A cabinet 18"x18"x12"=3888 cubic inches
That's close enough
I think something like 12"x20"x24" would be better, your head might fit on it the 24" side
SEALED(closed back)
 
#6
GuzBaas said:
HOW BIG IS THAT?

2 cubit feet is 2'x2'x'2.... thats HUGE!!
Click to expand...


2'x2'x2' = 8 cubic feet. But you're right that it's huge.


And I agree with 082752. Something like 12"x20"x24" would be better.


Get WinISD and learn how to use it to design a cabinet. Good learning experience and pretty much a necessity if you're going to be doing this yourself.

Invalid Link Removed
 
#11
Ok here is a picture of it in the raw stage and it may not get to much further because I can put a C2515 in it right now and paint won't make any difference 12x20x24: Invalid Link Removed
Here is a EBO guitar case that im in the middle of building too. Since they don't make one specificly for a EBO.(You have to use a longer case made for a EB3): Invalid Link Removed
May not look worth dam but no one is going to see it but me. I really think the speaker cab is going to KickAss with my old timey Peavey Mark IV @210watts into one 15" Eminence C2515 but...maybe not 8-D
 
#13
HAHAHA Guess what? I don't have a dime invested in either project. It's made out of scrap lumber. You can see the grain on the cabinet is running the wrong direction hahaha.
If it doesn't sound any good I can give it to Big Bertha for a Porta Potty
 
#15
Hi.

For some reason that Eminence .pdf just gives an Adobe memory error message for me ???.

Guz, You gave the dimensions for 8 cu-f cab and everyone gave the dimensions for 2 cu-f cab, how's that bigger?

The width of the cab is usually determined by the width of the existing cab, head, rack, personal preference etc. and the other dimensions are adjusted to that.

With the WinISD (+1 for that) suggested by hbarcat earlier, You can do all that easily. You can also fiddle with the internal volume to see what difference does that make. Generally larger=better. Soundwise that is ;).

Regards
Sam
 
#16
T-Bird said:
With the WinISD (+1 for that) suggested by hbarcat earlier, You can do all that easily. You can also fiddle with the internal volume to see what difference does that make. Generally larger=better. Soundwise that is ;).
Click to expand...
Yes and no. Bigger cabs sound bigger on the bottom for sure. But like in the case of the bigger Thiele cabs for the B-15's of the late 60's and 70's, they sacrifice upper mid response and they're more inefficient and not as loud. Fortunately, with those cabs, the lower mid is to die for, so the lack of upper mids isn't such a bad thing. But if you're looking for a louder cab with more even response, the smaller double and single baffle cabs of the 60's do that, although they don't go as deep as the Thiele cabs.

So while generally bigger is better for low end response, it really all depends on what you're looking for.
 
#17
you don't sacrifice mids with a bigger vented box vs a smaller one. what generally happens is the bass becomes more present hence the mids sound more subdued. what you do sacrifice is output. the smaller cab will generally handle more power and get louder. the larger cab will generally have a lower response but will not get as loud nor handle as many watts.
 
#18
CrackBass said:
you don't sacrifice mids with a bigger vented box vs a smaller one. what generally happens is the bass becomes more present hence the mids sound more subdued. what you do sacrifice is output. the smaller cab will generally handle more power and get louder. the larger cab will generally have a lower response but will not get as loud nor handle as many watts.
Click to expand...

If making the cab small has caused a midbass hump then that smaller cab will be louder in that region than the larger cab. The larger cab will not handle as much power in the lows but it will more than make that up with increased sensitivity in the lows, so overall apart from any midbass humps a larger cab will be just as loud, if not louder, than a smaller cab.

Alex
 
#19
alexclaber said:
If making the cab small has caused a midbass hump then that smaller cab will be louder in that region than the larger cab. The larger cab will not handle as much power in the lows but it will more than make that up with increased sensitivity in the lows, so overall apart from any midbass humps a larger cab will be just as loud, if not louder, than a smaller cab.

Alex
Click to expand...
Well, you're the expert and I'm definitely not.
 
#20
So in other words using a Eminence C2515
more mids>> build a sealed 1.6 cu.ft. cabinet
more lows>> build a vented 4.2 cu.ft. cabinet
use them both plugged in for 300 watts@2ohms Peavey mark4
OUTSTANDING

Rec. Enclosure Volume (Sealed): 1.6-2.9 cu.ft. / 45-82 Liters
Rec. Enclosure Volume (Vented): 3.0-4.2 cu.ft. / 85-119 Liters
 

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