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FS: 12" Sub 250rms - Dual Voice Coil 

 

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 Post subject: FS: 12" Sub 250rms - Dual Voice Coil
Posted: Tue Mar 29, 2005 4:00 pm 
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These extreme subwoofers are built to exceed today’s high quality competition standards. Each subwoofer utilises three important features used in today’s best subwoofers: dual voice coils, double magnets and cast frames.

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Offers around $120

Some of the design features include:
- 4mm thick non-pressed coated paper that can withstand huge
excursions with minimal flex or break-up.
- The magnet: Two 1.41Kg totalling a massive 2.82Kg.
- The basket: Thick heavy duty cast aluminium with zero flex, even
under the most horrendous driving conditions.
- The backing plate: 19mm thick (most woofers are, on average,
8-10mm). This gives excellent linearity.
- Pole piece: A flared vent at the rear increases air movement to cool the voice coils.
- Dual voice coils: Give you 3 different wiring options to best suit your amplifier. Dual 4-ohm voice coils give you greater system wiring flexibility. Connect the voice coils to achieve an impedance that ideally suits your amplifier.
- Parallel voice coil mode: Wiring the voice coils in parallel, to present a 2 ohm load, allows you to extract maximum power from a high-current, 2 ohm stable, amplifier.
- Series voice coil mode: Wiring in series gives each speaker an 8-ohm load. If you wire the two 8 ohm subs in parallel, you get a 4 ohm load that’s suitable to utilise on the bridged output of a 2 channel amplifier.


Specifications
Voice coil wiring single parallel series

Nominal impedance-ohms 4 2 8

Power handling-WRMS 150 250 250

Sensitivity (SPL)-1 Watt@1Mtr 85.5 87 88.5

Voice coil resistance (Re) –ohms 3.7 2.1 7.2

Resonant frequency (Fs)-Hz 24 24 24

Mechanical Q factor (Qms) 3.58 3.67 3.75

Electrical Q factor (Qes) .48 .28 .236

Total Q factor (Qts) .423 .26 .222

Equivalent volume (Vas)-Lt 75 75 75

Cone area – square metres .0487 .0487 .0487

Voice coil diameter – mm 65 65 65

X max (in one direction)- mm 5.5 5.5 5.5


Sound offs won with this model of sub (not this ACTUAL SUB)


•1st place at Sydney auto salon’s final battle 2001 in the super street 3-4-subwoofer division.

•1st place at autobahn’s small car Sunday 2001in Fairfield in the heavyweight division. Also being loudest for the day with a whopping 148.8dB.

•1st place at the Canberra Summernats 15, 2002 in the SPL Street and Street Pro. 601+ watt division.

•1st place at the Canberra Summernats 15, 2002 as the SPL outright winner.

 

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1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

Last edited by pyroay on Thu Apr 07, 2005 6:45 pm, edited 4 times in total.

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Posted: Wed Mar 30, 2005 2:39 pm 
Fordmods Audio and Turbo Expert
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Bump:

Anyone else?

This is a good quality sub and dual voice coil provides good flexability with wiring etc...

I'll take $150 including postage in Vic

 

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Pro Class
1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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Posted: Fri Apr 01, 2005 9:38 am 
Fordmods Audio and Turbo Expert
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Price drop.

 

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1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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Posted: Fri Apr 01, 2005 2:19 pm 
Smokin em up
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Ride: EL XR6

Power: 141 rwkw

Location: Liverpool
NSW, Australia

i may be interested as i need a couple 12's for my new setup. are they new or used? im in sydney so i think pick up is not possible...
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Posted: Fri Apr 01, 2005 3:11 pm 
Fordmods Audio and Turbo Expert
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I have one remaining, so you would need to purchase the other one new if you were looking for 2.

I can deliver, allow $15 delivery

 

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Pro Class
1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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Posted: Fri Apr 01, 2005 5:12 pm 
Getting Side Ways
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Ride: EL Fairmont

Location: Brisbane
QLD, Australia

Are these still available new? was looking on the jaycar website but couldnt find them, however, i think that is because they charge you for the catalouge and dont put the full range on the web

 

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Posted: Fri Apr 01, 2005 5:16 pm 
Fordmods Audio and Turbo Expert
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I am informed they are but if you were intending on purchasing one from me and then getting others you would need to check.

 

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Pro Class
1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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Posted: Mon Apr 04, 2005 9:03 am 
Fordmods Audio and Turbo Expert
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Joined: 14th Dec 2004

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Location: Traralgon
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Bump, still looking for offers around $120?

 

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Pro Class
1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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Posted: Thu Apr 07, 2005 6:46 pm 
Fordmods Audio and Turbo Expert
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Age: 37

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Joined: 14th Dec 2004

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Location: Traralgon
VIC, Australia

bump

 

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Pro Class
1st Super Tech - Summernats 2007
Australian SQ Champion - Am Show 2004
Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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