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Suggested/Modeled
Enclosure Sizes 02_june_14
each metronome is determined by
a height (L), a closed end area (So), an open end area (Sl),
a driver offset (Zd), and a terminus/port size -- numbers in brown underneath
are possible WxD )check to make sure driver fits). Internal imensions are given in
inch2/mm2, with the aspect used in the model underneath. Circular
terminus/port is diameter x length (inch/mm).
|
|
| Driver |
L
|
So
|
Sl
|
Zd
|
terminus
|
|
| Fostex FE108ESigma |
40.5625
|
1.65
(1,056)
|
34 (21,924)
|
14.625
|
2 x
3 (51x76)
|
| <plans> |
/ 1031
|
2.625x0.625
(66x16)
|
8x4.25
(203x108)
|
/372
|
|
|
| Fostex FE126e |
48/1219
|
3.5
(2,222)
|
36.5
(24,831)
|
20/508
|
2 x
3 (51x76)
|
| |
2.8x1.25
(71x31)
|
7.75x4.75
(197x126)
|
|
| Fostex FE126e Bipole |
7 (4,444)
|
77 (49,662)
|
3 x
3 (76x76)
|
| |
4x1.75
(101x44)
|
11x7
(279x178)
|
|
|
| Fostex FE127e |
48/1219
|
5.0/3,264
|
40/25,988
|
20/508
|
2 x
1.75 (51x44)
|
| <plans> |
|
2.5x2
(64x51)
|
7x5.75
(178x146)
|
|
|
|
| Fostex FE168eSigma |
60/1524
|
2.5/1,600
|
60/38,610
|
30/762
|
3 x
5 (76x127)
|
| |
|
2.5x1
(64x25)
|
10x6
(254x152)
|
|
|
|
| Hemp FR6.5c |
60/1524
|
6.25/4,096
|
121/77,841
|
30/762
|
3 x
2 (76x51)
|
| Stuff 0.35lbs ft^3 above
the driver |
2.5x2.5
(64x64)
|
11x11
(279x279)
|
|
|
|
| Fostex FE167e |
60/1524
|
10/6,528
|
70/45,212
|
30/762
|
3 x
2 (76x51)
|
| (preferred) |
|
4x2.5
(102x64)
|
10x7
(254x178)
|
|
|
|
| Fostex FE167e |
60/1524
|
10/6,528
|
123/79,250
|
30/762
|
3 x
2 (76x51)
|
| Fostex FE207e |
3 x
3 (76x76)
|
| Fostex FF225wk |
3 x
1.5 (76x38)
|
| Hemp FR8 |
4x2.5
(102x64)
|
12.25x10
(312x254)
|
3 x
2 (76x51)
|
| Pioneer B20FU20-51FW |
|
4 x
2 (102x51)
|
|
| Hemp FR8c |
60/1524
|
7.5/4,864
|
196/126,672
|
30/762
|
3 x
2 (76x51)
|
| |
|
3x2.5
(76x64)
|
16x12.25
(406x312)
|
|
|
|
| Fostex FE208eSigma |
60/1524
|
0/0
|
60/38,610
|
30/762
|
3 x
5 (76x127)
|
| (4 ohms series resistance) |
|
2.5x0
(64x0)
|
10x6
(254x152)
|
|
3 x
3 (76x76) max flat
|
|
| Audio Nirvana 10" |
72/1829
|
12/7,752
|
181/117,024
|
32/813
|
4 x
3 (102x76)
|
| |
|
4x3
(102x76)
|
14.5x12.5
(368x318)
|
|
|
|
| Lowther DX-2 |
60/1524
|
24.5/1,842
|
168/108,580
|
30/762
|
3 x
1.25 (76x32)
|
| |
|
3.5x7
(89x178)
|
14x12
(356x305)
|
|
|
|
| Audio Nirvana 12" |
60/1524
|
60/38,608
|
480/309,372
|
30/762
|
3 x
1 (76x25)
|
| |
|
10x6
(254x152)
|
24x20
(609x508)
|
|
|
| Audio Nirvana 12" |
60/1524
|
36/23,104
|
400/258.064
|
30/762
|
4 x
1 (102x25)
|
| Cast Frame |
|
6x6
(152x152)
|
20x20
(508x508)
|
|
|
|
| VIFA P13W Bipole |
48/1219
|
2.5/1,600
|
80/51,562
|
24/610
|
3 x
2 (76x51)
|
| <plans> |
|
1x2.5
(25x64)
|
8x10
(203x254)
|
|
|
|
| VIFA P17 |
48/1219
|
2.5/1,600
|
80/51,562
|
24/610
|
3 x
2 (76x51)
|
| |
|
1x2.5
(25x64)
|
8x10
(203x254)
|
|
|
|
| Jordan JX92S |
48/1219
|
2/1,275
|
48/30,856
|
24/610
|
2 x
5 (51x127)
|
| |
|
1x2
(25x51)
|
8x6
(203x152)
|
|
|
|
| CSS EL70 |
48/1219
|
12.25
/7,903
|
81 (52,258)
|
16/406
|
3 x
1 (76 x 26)
|
| |
3.5
x3.5 (89x89)
|
9x9
(229x229)
|
|
| CSS EL70
Bipole |
25 (16,129)
|
144
(92,903)
|
4 x
0.75 (101 x19)
|
| <plans> |
5 x 5 (127x127)
|
12x12
(305x305)
|
|
21_january_07 / updated 19-may-2014
Notes:
0/ clik the links (below) to see larger, more detailed plans
1/ the terminus exit needs to have an exit to the outside world. In the examples
the base of the pipe is raised by the amount of the port diameter.
2/ Feel free to play with the aspect ratio of the start & finish rectangles --
make sure you leave enough room to mount the driver & fit the magnet.
3/ A bipole can be made by taking a monopole, double So & Sl,
and double the area of the port (leaving the length the same)
4/FE167e & FE207e fit in the same box (with the exception of the size of the
port). Gif file is preliminary drawing is for FE207, shorten the port to 2" (51mm) for
the Hemp FR8.
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Example Enclosures
|
Suggested Baffle-Step
Compensation Starting Points
(only required for monopoles)
|
| Drivers |
|
BSC (Rbs
| Lbs )
|
Zobel (Rz
| Cz )
|
|
| FE108ESigma/FE126 |
|
1.6 R + 0.5 mH
|
7.75 R + 0.5 uF
|
| FE167e |
|
3 R + 1 mH
|
9 R + 5 uF
|
| Fostex FE207e |
|
2.8 R + 0.9 mH
|
8 R + 6 uF
|
| Audio Nirvana 10" |
|
4 R + 2 mH
|
9 R + 5 uF
|
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