Fat Thor - Frugal-phile

Oct 13, 2005 - 24 3/8. [619.6]. 5 1/4. [132.2]. 11. [280]. 23 3/4. [604.1]. 29 3/4. [756.1]. 35 3/4. [908.1]. 33 1/4 ... 9 3/8. [237]. Fat Thor ML. 19-november-05 updated: 06-november-07 inspired by diyAudio.com ... Millenium. T25CF002. +. 0.7 mH.
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11 [280]

35 3/4 [908.1]

29 3/4 [756.1] 45 1/4 [1149]

Fat Thor 1st pass 13-october-05 inspired by diyAudio.com drawn by dld

23 3/4 [604.1]

9 [229] "pedistal" required to lift terminus free (and raise tweeter closer to listening level)

33 1/4 [844.8]

5 1/4 [132.2] 24 3/8 [619.6]

Fat Thor ML 19-november-05 updated: 06-november-07 inspired by diyAudio.com tweaked by Scottmoose drawn by dld

Placement of brace (just off centre). Notch the brace to accomodate the drivers. Mid-woofer magnets should fit tightly to notch. Brace needs to be filled with random holes with the goal of 35-50% open space.

44 1/2 [1130]

7 1/16 [179]

9 5/16 [237]

7 3/4 [197] 9 3/8 [237]

optional additional bracing (just off centre). Brace needs to be filled with random holes with the goal of 35-50% open space.

35 3/4 [908]

9 5/16 [237]

29 3/4 [756]

"pedestal" required to lift terminus free (and raise tweeter closer to listening level) or run the port out the back or side

23 3/4 [604] 33 15/16 [863]

Notes: 1/ drawn with 3/4" (19mm) material 2/ 0.75 lbs / ft^3 (12 g /litre) 3/ 3" D, 4" long port (75mm x 102mm)

5 3/16 [131]

4/ corner reflectors non-critical

9 [229]

20 7/8 [530]

13 1/2 [343]

3.50°

35 3/4 [908.1]

29 3/4 [756.1] 44 1/2 [1131]

23 3/4 [604.1]

Fat Thor ML Trapezoidal Variation 14-october-05 inspired by diyAudio.com tweaked by Scottmoose drawn by dld 9 [229]

Short Thor ML-TL 15-october-05 / updated 07-nov-07 inspired by diyAudio.com designed by Scottmoose drawn by dld side-to-side holey braces, unevenly spaced

36 [914]

Notes:

45 [1143]

1/ drawn with 3/4" (19mm) material

30 [762]

2/ 0.5 lbs / ft^3 (8 g /litre). Stuff from the top to the half-way mark, or just past

46 1/2 [1181] 24 [610]

3/ 3" D, 6" long port (75mm x 152mm) "pedistal" required to lift terminus free (and raise tweeter closer to listening level)

4/ swiss cheese bracing as above. 5/ 3/4" (19mm) brace front-to-back couples the midbasses to cabinet back, top, & side-to-side braces. 6/ side-to-side are irregularily spaced using golden ratio. Diagonal is even better

7 1/2 [191] 9 [229]

20 1/4 [514] 21 3/4 [552]

7/ port can be moved to the front or bottom

Small Thor ML-TL

4 1/2 [114.3]

27-april-06 inspired by diyAudio.com designed by Scottmoose drawn by dld

42 3/4 [1085.5]

36 3/4 [933.5]

Notes: 30 3/4 [781.5]

49 1/2 [1257.3]

1/ drawn with 3/4" (19mm) material 2/ 0.5 lbs / ft^3 (8 g /litre). Stuff from the top to the half-way mark, or just past 3/ 3" D, 4" long port (75mm x 102mm) 4/ swiss cheese bracing as above. 5/ 3/4" (19mm) brace front-to-back couples the midbasses to cabinet back, top, & side-to-side brace. 6/ side-to-side are irregularily spaced using golden ratio. Diagonal is even better 7/ port can be moved to the front or bottom

9 [228.6]

7 [176.6] 12 3/4 [323.8]

5.7 µF

18 µF

4.235 Ω (8Ω || 9Ω)

Millenium T25CF002

0.45 mH 0.46 Ω 20g

+

2 x EXcel W18E001

2.5 Ω 1.2 mH 0.24 Ω 14g

0.7 mH 0.18 Ω 14g

+

+

0.05 mH 0.09 18g 22 µF

SEAS MTM Crossover V2 drivers as used in Thor/Odin designed by jimangie1973 drawn by dld / 29-november-2009

Revised Crossover

1.33 Ω (2Ω || 4Ω)

10 µF

0.05 0.3 mH 0.09 0.36 Ω Jantzen Jantzen 20g 18g

10 µF

2.2 Ω

0.6 mH 0.53 Ω Jantzen 20g

Millenium T25CF002

8Ω 4 µF

+ 2 x EXcel W18E001

2.0 mH 0.31 Ω Erse 14g 30 µF

0.7 mH 0.18 Ω Erse 14g

+

+

0.05 mH 0.09 Ω Jantzen 18g 22 µF

SEAS MTM Crossover drivers as used in Thor/Odin

Note: bafflestep for 10" baffle width (a full 6 dB is implemented) see for more info designed by jimangie1973 drawn by dld / 04-september-2007

A revised version exists