Sundown Audio - SA-Series v.2 12"

This SA-10/12/15 v.2 series is a top-down upgrade from the original SA series. The 2.75” coil punches way above its weight, outperforming many 3” coils without the adding weight & with the added advantage of a wider spider. We are able to perfectly balance the mass, motor force, and suspension stiffness for the intended power level.

The motor also features a large magnet shorting ring (faraday ring) to reduce distortion and deliver smoother response across the entire acoustic spectrum. The motor & coil setup is mated to an extremely robust multi-layer spider with fully tied-on & doubled-up “XL” tinsel leads. A competition-grade paper cone, strong foam surround, and cast aluminum frame are used to complete this masterpiece. On top of the ~19mm of one-way linear excursion we have an x-mech limit of 37mm one-way before coil bottom making it nearly "bottomless."

Specification	SA-12v2 D2	SA-12v2 D4
Fs	38.89 Hz	33.60 Hz
Re	3.91 Ω	6.35 Ω
Qms	4.5133	4.0178
Qes	0.5070	0.4996
Qts	0.4558	0.4443
Mms	256.55 g	321.84 g
Cms	65.29 µm/N	69.70 µm/N
Sd	735.5 cm²	735.5 cm²
Vas	26.29 L	28.06 L
Sensitivity	86.59 dB	85.03 dB
BL	21.990 T·m	29.390 T·m
Le	3.18 mH	4.64 mH
X-Max	19 mm	19 mm
RMS Power	1250 W	1250 W
Peak Power	2500 W	2500 W

Specification	SA-12v2 D2/D4
Overall Diameter	12.83"
Cutout Diameter	11.01"
Motor Diameter	9.68"
Mounting Depth	7.50"
Displacement	0.11 Cu. Ft.
Sealed Volume	1.0 cu ft
Ported Volume	1.75 cu ft
Port Tuning	35 Hz
Port Area	26 sq in
4th Order Sealed	0.75 cu ft
4th Order Ported	2.25 cu ft
4th Order Port Area	15 sq in
4th Order Port Length	6"