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1967 Pontiac Firebird
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Discussion Starter · #1 ·
Originally wanted to go with 2 15's in a trunk baffle but 12's would be easier to fit and the cone area of 3 12's is almost as much as 2 15's.

Anyway the Skar SDR 12's are on sale right now and that would help the budget but just wanted so opinions. 3 12's for under $300 is pretty appealing right now especially since the car restoration itself has been so expensive.

Car is a 1967 Firebird.

Thought's, opinions?

  • 12-inch Dual 2 Ohm Voice Coil Configuration
  • Peak Power: 1,200 Watts
  • RMS Power: 600 Watts
  • Competition Grade Pressed Paper Cone
  • High Roll Foam Surround
  • Advanced Air Flow Cooling System
  • 2.5" High Temperature Copper Voice Coil
  • Motor Weight: 97 oz
  • Frequency Response: 22 - 300 Hz
  • Sensitivity: 84.7 dB
  • Fs: 32 Hz
  • Re: Dual 2 Ω
  • Qms: 6.76
  • Qes: 0.58
  • Qts: 0.53
  • Mms: 249.4 gr
  • Nref: 0.185%
  • Cms: 0.11 mm/N
  • Bl: 16.67 n/a
  • Vas: 36.2 L
  • Sd: 471.4 cm²
  • Xmax: 13.5 mm
 

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Without modeling them, that fs looks fairly high and the Xmax is pretty small. A single high excursion 15” like an sql 15 will probably have more output, especially down low.

how much power do you have?
 

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If you can fit 15s, I think these NVX drivers look better on paper, you also save $100 bucks over three 12s. They claim to have a shorting ring as well which might be a good thing.. They also have lower fs.

Blue is NVX VSW 15 - x2
Red is the 12 skar you linked x3
Green is the NVX VSW 12 - x3
Pink is the 15 inch version of the Skar sub x2

309507


Everything modeled on 500 watts (total power).
309508


Now lets get into a more interesting idea.
GRS 12SW-4HE 12" ($40 each - single 4 ohm)

Blue is NVX VSW 15 - x2
Red is the 12 skar you linked x3
Black is the GRS 12 x3
Light blue is an Acoustic elegance 15au (popular high end Car IB sub) w/ 30 hpf - x1 ($400)

I dont think you can beat the GRS subs for $40 each. If you could fit the 15 nvx I would consider those first, the GRS x3 would be 2nd choice for only $120 total in subs is just too good a deal.
309510
 

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Here is a thread where someone grabbed a few (16) for some home IB project.
 

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1967 Pontiac Firebird
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42 Posts
Discussion Starter · #6 ·
Wow, I can't believe how good the NVX 15 looks! That definitely makes me consider the 15's now. I absolutely can fit 15's it's just going to require a little more work since I will have to angle the baffle. Thanks for modeling the subs, really helps to have that visual!
 

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1967 Pontiac Firebird
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42 Posts
Discussion Starter · #8 ·
I was really close to ordering the Dayton Max X 15's but when I looked earlier they're on backorder now. Just looking at the specs they seemed like they would well in an IB. Xmas was like 19mm, Qts .4, Fs 21.7hz and they're only $199ea.
 
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