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SA Series


The SA line was designed to be the centerpiece of the Sundown Audio subwoofer lineup -- the line to which all of our other lines are compared. We started with an FEA optimized motor design capable of 19mm of one-way Klippel verified excursion and significantly more x-mech (maximum mechanical excursion). This motor was mated to a top quality double layer nomex spider, an SPL competition grade paper cone, and a strong foam surround capable of handling the excursion and force generated by the motor structure. The motor also features dual faraday rings (shorting rings) to reduce inductive distortion. At Sundown Audio this still was not enough so we designed a highly optimized voice coil cooling system that ensures that an SA series woofer will never over-heat when used anywhere close to it's rated power level. This system allows our 2.5" coil to match and exceed the thermal performance of many 3" coil drivers on the market today. This same voice coil cooling system has been applied to all of our larger woofers lines as well due to it's proven effectiveness over the years in the SA series.

All of this hard work and engineering has lead to the incredible reputation now enjoyed by the SA series worldwide. We are very proud of what these woofers are capable of and we believe that they are one of the best woofers on the market today in their price and power range.

Xmax = 19mm one-way by 70% BL
RMS Power = 600-watts

SA-8 v.3

The SA-8 v.3 represents yet another step forward in low distortion, ported box 8 inch subwoofer performance. We started with a proprietary FEA optimized motor design made just for the SA-8 v.3 which features a large magnet ID shorting ring and several other advanced distortion reduction technologies. This motor is mated to a custom tooled and patented (US Patent D691595) frame which allows for a larger spider and superior clearances to nearly any other 8" woofer on the market today. The spider itself was custom tooled to achieve a very even compliance curve and it was also equipped with our latest flat, XL tinsel lead wire for incredible durability. The SA-8 v.3 features a full 16mm of Klippel verified one-way linear excursion and mechanical capacity in excess of double the linear limits to ensure that mechanical failures are nearly impossible at any reasonable power level.

The SA-8 v.3 steps in a different direction with its voice coil cooling than its predecessor. As the SA-8 v.3 uses a 2" coil there is less steel in the pole than with a larger diameter coil so we preserved all of it by using a solid pole-piece. The pole is surrounded by 16 flared gap vents to allow maximum air-flow across the voice coil. Since we implemented a different style of voice coil cooling we eliminated our plastic vent spacer thus reducing the depth by 5mm (0.2”) compared to the v.2 model.

The standard SA-8 v.3 features a 4-layer copper voice coil for the most possible low-end extension. It also features a newly tooled surround with a more linear shape and more excursion capacity than the prior v.2 model.

It wasn’t an easy task to build on the legendary performance of the SA-8 v.2 but with nearly 4-years of research and feedback from customers we were finally able to do with the v.3 version! If you liked the v.2 model then you will definitely appreciate the family heritage and the improvements to power handling, distortion characteristics, and mechanical durability.

Xmax = 16mm one-way by 70% BL
RMS Power = 500-watts
  • Specifications SA 8v3 D2 SA 8v3 D4 SA‐10D2 SA‐10D4 SA‐12D2 SA‐12D4 SA‐15D2 SA‐15D4
    RE (ohms) 3.36 6.0 4.29 7.08 4.57 7.07 4.61 7.75
    FS (Hz) 38.29 40.0 35.4 36.6 33.71 33.96 34.88 36.95
    Vas (L) 6.88 7.17 10.13 10.66 21.21 24.63 54.69 52.35
    Qes 0.324 0.392 0.52 0.54 0.58 0.55 0.72 0.85
    Qms 6.310 4.310 5.41 5.30 5.34 5.15 6.52 6.63
    Qts 0.309 0.360 0.48 0.49 0.52 0.49 0.65 0.75
    Le (mH) 2.08 3.32 3.41 4.71 3.40 4.84 3.39 4.98
    BL (NA) 18.94 22.06 20.40 24.82 21.64 25.67 21.76 25.87
    Mms (Grams) 144 126.6 230 205 280 237 338 315
    Cms (uM/N) 120 125 87.8 92.4 79.43 92.27 61.42 58.8
    Sens (1w/1m) 82.79 82.71 81.0 81.6 83.21 84.22 86.81 86.68
  • SA 8

    SA 10

    SA 12

    SA 15

    SA 18

    Sealed Not Recommended 0.5 ft^3 1.0 ft^3 2.5 ft^3  
    Ported 0.5-0.75 ft^3 @ 35hz 1.0-1.25 ft^3 @ 35hz 1.5-2.0 ft^3 @ 35hz 3.0-4.0 ft^3 @ 35hz  
    Displacement 0.08 ft^3 0.10 ft^3 0.14 ft^3 0.17 ft^3  
    Depth 6 5/8" 6" 6 1/2" 7 1/2"  
    Outside Diameter 8 3/8" 10 1/2" 12 5/8" 15 5/8"  
    Cut-Out 7 3/8" 9 1/4" 11 1/8" 14 1/8"  
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