Sundown Audio SA-Classic 15" 750W Black Motor Subwoofer

Sundown AudioSKU: SW-SACL15D4

Sale price$299.99
In stock



Here at Sundown Audio we take feedback from customers and dealers seriously. With the launch of the SA v.2 woofers we heard a lot of call to also keep the old version for lower depth / lower cost applications — so we did that via the “Classic” SA. Still available in 10's, 12's and 15's, it is essentially the SA v.1 Rev.3 but with a black motor finish. We even squeezed in an upgrade… the motor is bolted together for enhanced long-term durability!

The Sundown SA series has been our most popular product line since the introduction of the SA-12 in 2009. It was the result of over a year of testing and prototyping until all of our goals and expectations were blown away. The SA series has continually evolved over the years thanks to extensive testing and feedback from our SPL competition Team and our customers but still stays true to its legendary design heritage. It has never failed to prove itself year-in and year-out in every application ranging from daily musical builds to all-out SPL competition vehicles.

When designing the SA series we started out with an FEA optimized motor & coil design capable of 19mm of one-way Klippel verified excursion and just over 33mm of x-mech. This motor & coil setup was then mated up to an extremely robust double-layer Nomex spider with fully tied-on “XL” tinsel leads (84-Strands of Conductor), an SPL competition grade paper cone, and a strong foam surround. The motor also features a large magnet ID shorting ring (faraday ring) to reduce distortion causes by inductance & inductance variation over stroke.


  • Xmax = 19mm one-way by 70% BL
  • RMS Power = 750-watts
  • Vented magnetic gap
  • Optimized high-velocity pole vent
  • Innovative high-velocity vented frame spacer ring
  • Black Aluminum 2.5” voice coil former for superior heat dissipation
  • High Temperature copper voice coil wire
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On “XL” Tinsel Leads to prevent fatigue and failure
  • High strength cast aluminum frame
  • Optimized for small ported, sealed, & band-pass enclosures
  • These features combine to create the optimized coil ventilation system.


RE (Ohms) 4.29 7.00
FS (Hz) 37.8 36.4
VAS (L) 55.4 67.3
Qes 0.55 0.62
Qms 2.86 2.94
Qts 0.46 0.51
Le (mH) 3.41 4.71
BL (NA) 23.4 26.94
Mms (Grams) 319 284
Cms (uM/N) 55.3 67.2
Sens (dB @ 1w/1m) 89.2 89.0

Enclosure Specifications


Sealed Enclosure 2.5 cu ft
Ported Enclosure 3.5 cu ft
Recommended Tuning 35Hz
Recommended Port Area 35 sq in
Displacement 0.17 cu ft
Depth 7.69″
Outside Diameter 15.5″
Cut-Out 14″
Physical Dimensions Download


Product Brand Sundown Audio
Coil Dual 4 Ohm (D4)   Dual 2 Ohm (D2)  
RMS Power 750W  
Diameter 15"  

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