BK-12m for Fostex FE126En
Designed by planet10-hifi team, drawn by dld, 16-sept-2011© 2011 Madisound Speaker Components
Back loaded horn for the Fostex FE126En in the style of the classic BK16, BK20.
1]2]3]4]5]
6-10]11-12]
3/4” plans3/4” details5/8” plans5/8” detailsdamping plan3/4” cut plans5/8” cut plans
Drawings:
32[812.8]
15[381]
7 1/2[190.5]
4 1/2[114.1]
4 1/2[114.1]
4 1/2[114.3]
13 1/2[342.9]
5[127]
7 1/2[190.5]
3[76.2]
2[50.4]
1[25.4]
7[177.8]
3[76.2]
3[76.2]
Notes1/ drawn with 3/4” material2/ driver chamber damped with 1.5 oz (42 g) evenly distributed Acousta-Stuf
6[152.4]
56.3°
12.1°
45°
3 1/2[88.9]
i1
i2
i3
i4 i4
i5
17 3/4[450.9] 15 1/4
[387.4]
13 1/2[342.9]
14 1/4[362]
BK-12m Back Loaded Hornfor Fostex FE126EnPlans 1v0 3/4”16-sept-11 | design p10-hifi | drawing dld© 2010, 2011 Madisound Speaker Components
15
32
12°
45°45°
12°
12.0°
33.7°56.3°
4 1/4[107.8]
12 1/8[309.2]
6 1/2[165.1]
9[229]
i2
i3
i4
i5
Notes:1/ for 3/4” material2/ all pieces 6” “deep”
Simulated low frequency response
BK-12m Back Loaded Hornfor Fostex FE126EnAngled parts detail 3/4”09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
4 1/2
31 5/8
14 1/27 1/4
4 1/2 4 1/2
13 1/2
5
7 1/2
3
2
1
7
3
3
Notes1/ drawn with 5/8” material2/ driver chamber damped with 1.5 oz (42 g) evenly distributed Acousta-Stuf3/ additional stuffing to reduce bass up around the deflectors
6
56.3°
12°
45°
3 1/2
i1
i2
i3
i4 i4
i5
17 1/215 1/4
13 1/4
14
BK-12m Back Loaded Hornfor Fostex FE126EnPlans 1v0 5/8”09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
13 7/8
31 5/8
45°45°
12.0°
12.0°
33.7°56.3°
4 1/4[107.8]
12 5/32[308.5]
6 1/4[158.7]
9[229]
i2
i3
i4
i5
Notes:1/ for 3/4” material2/ all pieces 6” “deep”
Simulated low frequency response
BK-12m Back Loaded Hornfor Fostex FE126EnAngled parts detail 5/8”09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
12°
BK-12m Back Loaded Hornfor Fostex FE126Endamping09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
Driv
er C
ham
ber
driver chamber damped with 1.5oz (42 g) evenly distributed
Acousta-Stuf
additional stuffing to reducebass up around the deflectors
bottom
internal 2
top
int 4internal 5 internal 3
backbaffle
internal 1
side
6
6
6
15
32
15 1/46 23/3212 3/164 1/49
14 1/4 13 1/2
17 3/4 32
BK-12m Back Loaded Hornfor Fostex FE126Enpanel extents 3/4”09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
baffl
e
bott
om
back
inte
rnal
1
inte
rnal
2to
p
inte
rnal
3in
t 4
inte
rnal
5
int 4
int 4
int 4
inte
rnal
5
inte
rnal
3
back
inte
rnal
2
bott
om
baffl
e
inte
rnal
1
top
Notes:1/ for 3/4” material2/ drawn with 5mm kerf & 8mm edge trim3/ 2 sides out of a 2nd sheet
side
side
side
side
BK-12m Back Loaded Hornfor Fostex FE126En5’x5’ 3/4” suggested cut09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
baffl
e
bott
om
back
inte
rnal
1
inte
rnal
2
top
inte
rnal
3
inte
rnal
5
inte
rnal
5
inte
rnal
3
back
inte
rnal
2
bott
om
baffl
e
inte
rnal
1
top
Notes:1/ for 3/4” material2/ drawn with 5mm kerf & 8mm edge trim (kerf a touch less on le+ side of i4 pieces)3/ 2 sides out of a 2nd sheet
side
side
side
side
int 4
int 4
int 4
int 4
BK-12m Back Loaded Hornfor Fostex FE126En5’x5’ 3/4” alternate cut09-sept-11| design p10-hifi | drawing dld© 2011 Madisound Speaker Components
Notes:1/ for 3/4” material2/ drawn with 5mm kerf & 8mm edge trim
baffl
ebo
ttom
back
inte
rnal
1
inte
rnal
2
top
inte
rnal
3in
t 4
inte
rnal
5
int 4
int 4
int 4
inte
rnal
5
inte
rnal
3
back
inte
rnal
2
bott
ombaffl
e
inte
rnal
1
top
side
side
side
side
BK-12m Back Loaded Hornfor Fostex FE126En4’x8’ 3/4” suggested cut09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
baffl
ebo
ttom
back
inte
rnal
1
inte
rnal
2
top
inte
rnal
3
int 4
inte
rnal
5
int 4
int 4
int 4
inte
rnal
5
inte
rnal
3
back
inte
rnal
2bo
ttom
baffl
e
inte
rnal
1
top
side
side
side
side
Notes:1/ for 3/4” material2/ drawn with 5mm kerf & 8mm edge trim
BK-12m Back Loaded Hornfor Fostex FE126En4’x8’ 3/4” alternative cut09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
bottom
internal 2
top
int 4internal 5 internal 3
backbaffle
internal 1
side
6
6
6
14 1/2
31 5/8
15 1/46 1/412 5/324 1/49
13 7/8 13 1/4
17 1/2 31 5/8
BK-12m Back Loaded Hornfor Fostex FE126Enpanel extents 5/8”09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
Notes:1/ for 5/8“ material2/ drawn with 5mm kerf & 8mm edge trim
BK-12m Back Loaded Hornfor Fostex FE126En4’x8’ 5/8” suggested cut 09-sept-11 | design p10-hifi | drawing dld© 2011 Madisound Speaker Components
bott
om
inte
rnal
2
top
int 4
inte
rnal
5
inte
rnal
3
back
baffl
e
inte
rnal
1
side
side
side
side
back
bott
om
baffl
eto
pin
tern
al 1
int 4
inte
rnal
5
inte
rnal
3in
tern
al 3
6 3/16
inte
rnal
2
int 4
inte
rnal
3
int 4
with some conservation ofkerf & trim this strip becomes
wide enough for internalpieces