MarkAudio-Pensil-Ser.. - Creative Sound Solutions
MarkAudio-Pensil-Ser.. - Creative Sound Solutions
MarkAudio-Pensil-Ser.. - Creative Sound Solutions
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<strong>Pensil</strong> <strong>Ser</strong>ies<br />
Damped Air Coupler<br />
The Pencils are a small range of easy-to-build<br />
floorstanding cabinet designs for Mark Fenlon Audio<br />
drivers. They use a combination of traditional<br />
quarter-wave design, a custom T/S volume alignment,<br />
and Transmission Line damping to provide a balanced<br />
response with a flavour of both vented and TL<br />
enclosures. The impedance load is easy, being largely<br />
unreactive, and driver displacement is well controlled.<br />
Default recommended damping quantities (assuming<br />
dacron hollow-fibre material) are suggested in the plans;<br />
tailor these if required to suit your own amplifier[s] /<br />
room / taste. It is suggested that a removable back is<br />
employed on all boxes to allow easy tweaking of the<br />
damping<br />
<strong>Pensil</strong> 12<br />
<strong>Pensil</strong> 10<br />
<strong>Pensil</strong> 7<br />
<strong>Pensil</strong> 6<br />
<strong>Pensil</strong> R70<br />
<strong>Pensil</strong> P70<br />
for Alpair 12<br />
for Alpair 10<br />
for Alpair 7<br />
for Alpair 6<br />
for CHR-70<br />
for CHP-70<br />
©2009 Woden Design & Markaudio<br />
designed by Scott Lindgren<br />
drawn by dld / 27-december-2009<br />
free for non-commercial use only
8 7/8<br />
[226]<br />
10 3/8<br />
[264.1]<br />
7 1/8<br />
[180]<br />
2 1/2<br />
[64]<br />
35 1/2<br />
[901.7]<br />
37<br />
[939.8]<br />
14 1/2<br />
[368.2]<br />
13<br />
[330]<br />
10mm radius<br />
Notes:<br />
0/ drawing uses 3/4" (19.1mm) material. Quality multi-ply recommended<br />
1/ stuff with 1/2 to 3/4 pound per ft^3 (1.15 to 1.8 pounds = 0.52 - 0.8 kg) of<br />
polyfill<br />
2/cleats on back to allow for removable back, useful for adjusting the stuffing<br />
3/ bracing is suggestive only<br />
internal cleats for<br />
fixing removable back<br />
Simulated Response<br />
(MJK Worksheets)<br />
Alpair 12 <strong>Pensil</strong> 12<br />
©2009 Woden Design & Markaudio<br />
designed by Scott Lindgren<br />
drawn by dld / 27-december-2009<br />
free for non-commercial use only
5 3/4<br />
[146.1]<br />
1 1/4<br />
[31.8]<br />
<strong>Pensil</strong> R70<br />
(New) CHR70<br />
9<br />
[228.6]<br />
Stuff<br />
0.75lbs ft^3<br />
5 3/4<br />
[146.1]<br />
1<br />
[25.4]<br />
<strong>Pensil</strong> P70<br />
CHP70<br />
11 1/2<br />
[292.1]<br />
Stuff<br />
1.0lbs ft^3<br />
5 1/2<br />
[139.7]<br />
1 3/4<br />
[44.5]<br />
<strong>Pensil</strong> 6<br />
Alpair 6<br />
6<br />
[152.4]<br />
Stuff<br />
0.75lbs<br />
ft^3<br />
6<br />
[152.4]<br />
1 3/8<br />
[34.9]<br />
<strong>Pensil</strong> 7<br />
Alpair 7<br />
7<br />
[177.8]<br />
Stuff<br />
0.75lbs<br />
ft^3<br />
8<br />
[203.2]<br />
1 3/8<br />
[34.9]<br />
<strong>Pensil</strong> <strong>Ser</strong>ies<br />
©2009 Woden Design & Markaudio<br />
designed by Scott Lindgren<br />
drawn by dld / 28-december-2009<br />
free for non-commercial use only<br />
Notes:<br />
0/ drawing uses 3/4" (19.1mm) material. Quality multi-ply<br />
recommended<br />
1/ common internal dimensions all 35.5in height, 7.125in Zd.<br />
Stuff from the top to the top of the vent with polyfill at<br />
density specified<br />
2/cleats on back to allow for removable back, useful for<br />
adjusting the stuffing<br />
3/ for bracing and other details check the <strong>Pensil</strong>12 drawing<br />
<strong>Pensil</strong> 10<br />
Alpair 10<br />
12 7/8<br />
[327]<br />
Stuff<br />
0.75lbs ft^3<br />
7 1/8<br />
[181]<br />
35 1/2<br />
[901.7]
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