t-line subs for a DIY line array - Page 2

planet10 · 27th December 2002, 12:14 AM

Quote:

Originally posted by Jimmy154
What's the avantages of an array like that?

Increased sensitivity & in the nearfield it has a level fall-off of 3 dB per doubling of distance as opposed to the 6 dB from a point-source.

dave

roddyama · 27th December 2002, 12:20 AM

Dana,

Fantastic. They look like a lot-o-fun.

BTW, you can use the El Pipe-Dopo name if you like.

That is, if you haven't already given them a few choice names.

Rodd Yamashita

dana · 27th December 2002, 12:49 AM

Rod,

Thanks for the kind words and the offer. I have considered the old standby's "Tubal Legation", "Bjork Pipe" and "Lou Alcylinder", but I think that I will settle on "L'Tubage de Catpole".

planet10 · 27th December 2002, 01:29 AM

Here is an extract from dana's pdf. The pictures are quite detailed and i suggest anyone really interested get the pdf. I'm off to dinner but will put it up for downloading after.

dave

Digi · 27th December 2002, 02:03 AM

Dave, do you have a link to that PDF?

Thanks,

Rob

planet10 · 27th December 2002, 03:41 AM

Quote:

Originally posted by Digi
do you have a link to that PDF?

MLsub.pdf {350k}

dave

planet10 · 27th December 2002, 03:43 AM

dana,

What driver are you using in the sub?

dave

dana · 28th December 2002, 12:15 AM

Dave,

The drivers are from Professional Audio Systems (LX-2800), and were a Christmas gift a couple of years ago from an extremely generous friend of mine.

Specifications:
Diameter: 470 mm (18.5 inches)
Nominal Impedance: 8 ohms
Frequency Range: 30 Hz to 1 kHz
Highest Recommended Crossover Frequency: 500 Hz
Power Capacity: 600 watts
Sensitivity: 98 dB (@ 2.83v @ 1m)
Voice Coil Diameter: 99.3 mm (4 inches)
Voice Coil Material: edgewound aluminum
Winding Length: 27 mm (1.063 inches)
Former Material: Kapton
Magnetic Gap Length: 8 mm (0.315 inches)
Magnet Weight: 2.85 kg (6 lb 4 oz)
Magnet Assembly Weight: 9.06 kg (19 lb 15 oz)
BL Product: 22.6 Tesla Meters
Effective Piston Diameter: 0.39 m (15.35 inches)
Maximum excursion before damage: + 19 mm (+ 0.75 inches)
Re 4.6 ohms
Qts 0.226
Qms 2.28
Qes 0.251
Vas 425 L (15 ft3)
Cms 210 µM/N
Mms 160 grams
Mmd 138 grams
no 3.38 %
Le 1.6 mHy

Large Signal Parameters:
Sd 0.1195 m2 (185 in2)
xmax + 12.7 mm (+0.50 in)
Vd 1520 cm3 (93 in3)

Mounting Information:
Diameter: 470 mm (18.5 in)
Bolt Circle: 438 mm (17.24 in)
Baffle Cutout: 422 mm (16.6 in)
Depth: 206 mm (8.12 in)
Net Weight: 12 kg (26 lbs 5 oz)
Shipping Weight: 13.5kg (29 lbs)

Features:
Heavy ribbed cone
Highly damped EPDM half-roll edge (that looks like a Schwinn inner tube)

27th December 2002, 03:43 AM	#17
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	dana, What driver are you using in the sub? dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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27th December 2002, 12:20 AM	#12
roddyama diyAudio Moderator Emeritus Join Date: Jan 2002 Location: Michigan	Dana, Fantastic. They look like a lot-o-fun. BTW, you can use the El Pipe-Dopo name if you like. That is, if you haven't already given them a few choice names. Rodd Yamashita

27th December 2002, 12:49 AM	#13
dana diyAudio Member Join Date: Jul 2002 Location: Seattle, Washington	Rod, Thanks for the kind words and the offer. I have considered the old standby's "Tubal Legation", "Bjork Pipe" and "Lou Alcylinder", but I think that I will settle on "L'Tubage de Catpole".

27th December 2002, 02:03 AM	#15
Digi diyAudio Member Join Date: Feb 2002 Location: USA	Dave, do you have a link to that PDF? Thanks, Rob

28th December 2002, 12:15 AM	#18
dana diyAudio Member Join Date: Jul 2002 Location: Seattle, Washington	Dave, The drivers are from Professional Audio Systems (LX-2800), and were a Christmas gift a couple of years ago from an extremely generous friend of mine. Specifications: Diameter: 470 mm (18.5 inches) Nominal Impedance: 8 ohms Frequency Range: 30 Hz to 1 kHz Highest Recommended Crossover Frequency: 500 Hz Power Capacity: 600 watts Sensitivity: 98 dB (@ 2.83v @ 1m) Voice Coil Diameter: 99.3 mm (4 inches) Voice Coil Material: edgewound aluminum Winding Length: 27 mm (1.063 inches) Former Material: Kapton Magnetic Gap Length: 8 mm (0.315 inches) Magnet Weight: 2.85 kg (6 lb 4 oz) Magnet Assembly Weight: 9.06 kg (19 lb 15 oz) BL Product: 22.6 Tesla Meters Effective Piston Diameter: 0.39 m (15.35 inches) Maximum excursion before damage: + 19 mm (+ 0.75 inches) Re 4.6 ohms Qts 0.226 Qms 2.28 Qes 0.251 Vas 425 L (15 ft3) Cms 210 µM/N Mms 160 grams Mmd 138 grams no 3.38 % Le 1.6 mHy Large Signal Parameters: Sd 0.1195 m2 (185 in2) xmax + 12.7 mm (+0.50 in) Vd 1520 cm3 (93 in3) Mounting Information: Diameter: 470 mm (18.5 in) Bolt Circle: 438 mm (17.24 in) Baffle Cutout: 422 mm (16.6 in) Depth: 206 mm (8.12 in) Net Weight: 12 kg (26 lbs 5 oz) Shipping Weight: 13.5kg (29 lbs) Features: Heavy ribbed cone Highly damped EPDM half-roll edge (that looks like a Schwinn inner tube)

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