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FS in Los Angeles: two high-end sealed 12" aluminum cone subwoofers w/ 1kW amp- 5
FS in Los Angeles: two high-end sealed 12" aluminum cone subwoofers w/ 1kW amp- 5
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Old 14th July 2018, 12:24 AM   #1
taloyd is offline taloyd  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Los Angeles, CA, USA
Post FS in Los Angeles: two high-end sealed 12" aluminum cone subwoofers w/ 1kW amp- $635

We recently got a large piano, and that required a reconfiguration of the stereo and so despite how much I've enjoyed these, I have to let them go.

It's two 55 liter sealed boxes, each with a DVC 4 ohm (so in series for 8 ohms) TC-1000 (later known as the Epic series) with the aluminum cone, shorting rings, 22mm of xmax, and a strong enough motor to not need a huge box, resulting in a Qtc of 0.62 for each box. Boxes are 18" x 16" x 17" HWD.

The subwoofers are in parallel for a final 4 ohm load, and driven by a Keiga 52100 amplifier which has a 1000W RMS output at 0.1% THD for a very healthy 500 WRMS to each subwoofer. It additionally has a 25 Hz. boost, which is excellent for home theater, especially when used in conjuction with room EQ (always best to EQ down, not up, so the boost in the first place really helps with the low-end roll-off). This has a switching output stage that is nearly 90% efficient, and a linear power supply, so it weighs a solid 30 lbs. Was used externally. Amp has an auto-on that works very well - always comes on even with little signal, and does NOT turn off after a few minutes in the middle of a song/movie.

Between having two separate boxes which helps flatten out the room response (and is much more flexible than one huge box), and having basically unlimited dynamic range and extension from having so much volume displacement, this has been one of the best subwoofer solutions I've ever had. Definitely local pickup in Los Angeles only due to weight/bulk!

Per Unibox simulation software, this models at 107db at xmax at 20 Hz., and over 112db at 30 Hz. That's anechoic/without room-gain!

Driver specs (this took a long time to find):
Fs 23.00 Hz
Re 7.60 Ohm
Qms 3.90
Qes 0.49
Sd 500.0 cm2
Vas 97.0 l
Xmax peak 22.00 mm
Le 2.49 mH
Le2 0.00 mH
Re2 0.00 Ohm
Nominal Power 500.0 W

here's the slightly later DVC 2 ohm version of this driver, when they changed the name to Epic, and put their logo on the cone:
TC Sounds Epic 12" DVC Subwoofer


Amplifier specs:
Keiga 52100 Subwoofer Amplifier

Looking for a firm $635. Pickup only as this is big and heavy.

Thanks!
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File Type: jpg sub2.jpg (138.2 KB, 65 views)
File Type: jpg sub3.jpg (34.4 KB, 64 views)
File Type: jpg 004.jpg (841.0 KB, 64 views)
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Old 14th July 2018, 12:25 AM   #2
taloyd is offline taloyd  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Los Angeles, CA, USA
Alternately, might be interested in reusing the boxes for a different subwoofer project - if so, can do a commensurately lower price! Still won't ship though; these are way too heavy.

Cheers!
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