SA SERIES

SAv2 Product

Short product description to go here.

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T/S SPECS SA 6.5″ D2 SA 6.5″ D4
RE (Ohms) 4.0 7.1
FS (Hz) 48.9 51.8
VAS (L) 4.1 3.6
Qes 0.50 0.54
Qms 4.82 4.65
Qts 0.46 0.49
Le (mH) 1.69 2.45
BL (NA) 13.5 17.9
Mms (Grams) 74.8 75.6
Cms (uM/N) 0.14 0.12
Sens (dB @ 1w/1m) 81.6 81.5
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 0.15 cu ft
Ported Enclosure 0.3 cu ft
Recommended Tuning 40Hz
Recommended Port Area 4 sq in
Displacement
Depth
Outside Diameter
Cut-Out
COMING SOON… Enclosure designs by

The SA-6.5SW was created to achieve extremely high performance at less than 4” of mounting depth (3.8” to be precise). Rest assured that even with the limited depth the SA-6.5SW lives up to the reputation of the SA series! These little guys will take a beating in TINY ported enclosures. Our customers have been in love with the incredible performance per dollar since their launch in 2017.

As with several other lines (SLD and SD-4 notably) we used a solid-pole design. This allows the back-plate to rest against the back wall of the enclosure. This further reduces effective depth requirements for this woofer. Shallow depth aside this unit has a full 10mm one-way linear excursion and an x-mech in excess of double that! So there is almost no concern about bottoming out the coil. We also borrowed the hyper-extended pole technique from our larger lines to help prevent coil damage from exiting the gap forward. Furthermore; we even included a magnet ID faraday ring to keep inductive distortions in check!

RMS Power: 200-watts
Coil: 1.5” Diameter Copper Windings w/ Black Aluminum Former
X-Max: 10mm one-way by 70% BL
Magnet ID Faraday Ring
Solid Pole w/ Vent Channels

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T/S SPECS SAv3 8″ D2 SAv3 8″ D4
RE (Ohms) 3.36 6.0
FS (Hz) 38.29 40.0
VAS (L) 6.88 7.17
Qes 0.324 0.392
Qms 6.31 4.31
Qts 0.309 0.36
Le (mH) 2.08 3.32
BL (NA) 18.94 22.06
Mms (Grams) 144 126.6
Cms (uM/N) 120 125
Sens (dB @ 1w/1m) 82.79 82.71
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 0.3 cu ft
Ported Enclosure 0.65 cu ft
Recommended Tuning 35Hz
Recommended Port Area 9 sq in
Displacement 0.08 cu ft
Depth 6.625″
Outside Diameter 8.375″
Cut-Out 7.375″
COMING SOON… Enclosure designs by

SA-10 (Side)
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T/S SPECS SA Classic 10″ D2 SA Classic 10″ D4
RE (Ohms) 4.29 7.08
FS (Hz) 35.4 36.6
VAS (L) 10.13 10.66
Qes 0.52 0.54
Qms 5.41 5.30
Qts 0.48 0.49
Le (mH) 3.41 4.71
BL (NA) 20.40 24.82
Mms (Grams) 230 205
Cms (uM/N) 87.8 92.4
Sens (dB @ 1w/1m) 81.0 81.6
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 0.5 cu ft
Ported Enclosure 1.0 cu ft
Recommended Tuning 35Hz
Recommended Port Area 15 sq in
Displacement 0.1 cu ft
Depth 6″
Outside Diameter 10.5″
Cut-Out 9.25″
COMING SOON… Enclosure designs by

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 10s and 12s 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.

We realized that this still was not enough to meet our goal of delivering the best driver on market in this price range to our customers. To that end we designed a highly optimized voice coil cooling system that has since found its way into almost every other subwoofer we make to this day. This system allows our 2.5″ coil to match and exceed the thermal performance of many competing 3″ coil drivers on the market without requiring the usage of a much heavier voice coil than required for the design. The result is that the SA features the ideal mix of mass & stiffness to give you the best performance in nearly every type of enclosure. All of this hard work and engineering has led 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 hands down for the money.

Features & Technology:

  • 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.”

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T/S SPECS SAv2 10″ D2 SAv2 10″ D4
RE (Ohms) 3.90 6.82
FS (Hz) 37.0810 36.1409
VAS (L) 10.3683 12.3547
Qes 0.3598 0.3744
Qms 3.7041 3.5051
Qts 0.3280 0.3383
Le (mH) 3.5178 4.4560
BL (NA) 28.3634 31.5270
Mms (Grams) 318.8226 281.6632
Cms (uM/N) 57.7815 68.8513
Sens (dB @ 1w/1m) 83.42 83.67
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 0.5 cu ft
Ported Enclosure 1.0 cu ft
Recommended Tuning 35Hz
Recommended Port Area 15 sq in
Displacement
Depth
Outside Diameter 10.94″
Cut-Out 9.17″
COMING SOON… Enclosure designs by

The Sundown SA series has been our most popular line since its original introduction in 2009. What better way to create a new version 2 than to upgrade, literally, every single part of the woofer? We started with a larger, more powerful motor to drive the larger 2.75” coil and stronger soft parts – this maintains the perfect balance of the original SA series while also increasing the power handling to 1000-watts RMS.

When designing the SA v.2 series we started out with an FEA optimized motor & coil design capable of 19mm of one-way linear excursion by 70% BL and just over 35mm of x-mech. This motor & coil setup was then mated up to an extremely robust double-layer spider with fully tied-on & doubled-up “XL” tinsel leads (84-Strands of Conductor per lead), 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.

We further improved the voice coil cooling system from the original SA series. This system allows our 2.75″ coil to match and exceed the thermal performance of many competing 3″ coil drivers on the market without requiring the usage of a much heavier voice coil than required for the design. The key to the SA series is, in fact, the perfect balance of motors force to mass. We have maintained that delicate balance in the v.2 through extensive testing and optimizations.

We then borrowed the new frame, aluminum surround bolt-on clamps, and aluminum vent rings that we tooled for the U-Series to further bring the SA to new heights of performance and reliability. At this point you can think of it as a little brother to the U Series.

Of course if you still prefer the original, legendary, SA series we re-launched it as the “Classic” and it will remain in production in 10s and 12s.

—–

This 18 inch model features a larger motor than the SA-10/12/15 v2 at a full 205mm diameter and a 60mm magnet stack height. The top plate is also thicker in order to more effectively move the higher mass 18″ soft parts. It has a large 234mm diameter spider pack for very high mechanical stroke capacity. It utilizes the same 2.75″ coil as the other SA v.2 series for a 1000-watt RMS power rating.

—–

List of upgrades compared to the v1 SA series (Rev.1,2,3):

1) Magnet outer diameter increased from 180mm to 190mm
2) Magnet slugs increased from 25mm to 27mm in height (total 4mm more height)
3) Motor structure fully bolted together with 3x M6 bolts (eliminates the possibility of motor shifting)
4) Top-Plate “Slits” implemented as with the X and Z series. Increased cooling & reduced distortion.
5) Improved gap venting — more / flared gap vents.
6) Improve pole-vent design — smoothly flared on both sides.
7) Coil increased from 63.5mm (2.5″) to 70mm (2.75″) in diameter. Higher thermal capacity.
8) New “U series” style cast-aluminum frame for taller cones (more x-mech both top-side from cone to spider and bottom from spider to top plate)
9) Aluminum cast gasket to bolt-on surround.
10) Aluminum cast vent ring to enhance thermal transfer from motor to the frame.
11) Standard with double “XL” leads and “bolted-on” spider
12) Larger and thicker surround (same tooling as U series).
13) Strongest paper cones we have ever produced… new two-piece mold technique.
14) “Large Flange” dust cap just like our larger woofers. Essentially eliminates dust-cap glue failure.
15) Larger spider diameter on the 12/15″ models (the 10″ retains the same 188mm spider)… 12″ up to ~200mm and 15″ up to ~210mm
16) Improved spider material for longer life.

  • Xmax = 19mm one-way by 70% BL
  • RMS Power = 1000-watts
  • Vented magnetic gap
  • Optimized high-velocity pole vent
  • Innovative high-velocity vented frame spacer ring
  • Black Aluminum 2.75” voice coil former for superior heat dissipation
  • High Temperature copper voice coil wire
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On Double “XL” Tinsel Leads to prevent fatigue and failure
  • High strength cast aluminum frame
  • Optimized for small ported, sealed, & band-pass enclosures
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T/S SPECS SA Classic 12″ D2 SA Classic 12″ D4
RE (Ohms) 4.57 7.07
FS (Hz) 33.71 33.96
VAS (L) 21.21 24.63
Qes 0.58 0.55
Qms 5.34 5.15
Qts 0.52 0.49
Le (mH) 3.40 4.84
BL (NA) 21.64 25.67
Mms (Grams) 280 237
Cms (uM/N) 79.43 92.27
Sens (dB @ 1w/1m) 83.21 84.22
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 1.0 cu ft
Ported Enclosure 1.75 cu ft
Recommended Tuning 35Hz
Recommended Port Area 26 sq in
Displacement 0.14 cu ft
Depth 6.5″
Outside Diameter 12.625″
Cut-Out 11.125″
COMING SOON… Enclosure designs by

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 10s and 12s 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.

We realized that this still was not enough to meet our goal of delivering the best driver on market in this price range to our customers. To that end we designed a highly optimized voice coil cooling system that has since found its way into almost every other subwoofer we make to this day. This system allows our 2.5″ coil to match and exceed the thermal performance of many competing 3″ coil drivers on the market without requiring the usage of a much heavier voice coil than required for the design. The result is that the SA features the ideal mix of mass & stiffness to give you the best performance in nearly every type of enclosure. All of this hard work and engineering has led 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 hands down for the money.

Features & Technology:

  • 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.”

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T/S SPECS SAv2 12″ D2 SAv2 12″ D4
RE (Ohms) 3.91 6.35
FS (Hz) 38.8866 33.6039
VAS (L) 26.2867 28.0603
Qes 0.5070 0.4996
Qms 4.5133 4.0178
Qts 0.4558 0.4443
Le (mH) 3.1785 4.6357
BL (NA) 21.9903 29.3900
Mms (Grams) 256.5545 321.8425
Cms (uM/N) 65.2922 69.6976
Sens (dB @ 1w/1m) 86.59 85.03
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 1.0 cu ft
Ported Enclosure 1.75 cu ft
Recommended Tuning 35Hz
Recommended Port Area 26 sq in
Displacement
Depth
Outside Diameter 12.83″
Cut-Out 11.01″
COMING SOON… Enclosure designs by

The Sundown SA series has been our most popular line since its original introduction in 2009. What better way to create a new version 2 than to upgrade, literally, every single part of the woofer? We started with a larger, more powerful motor to drive the larger 2.75” coil and stronger soft parts – this maintains the perfect balance of the original SA series while also increasing the power handling to 1000-watts RMS.

When designing the SA v.2 series we started out with an FEA optimized motor & coil design capable of 19mm of one-way linear excursion by 70% BL and just over 35mm of x-mech. This motor & coil setup was then mated up to an extremely robust double-layer spider with fully tied-on & doubled-up “XL” tinsel leads (84-Strands of Conductor per lead), 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.

We further improved the voice coil cooling system from the original SA series. This system allows our 2.75″ coil to match and exceed the thermal performance of many competing 3″ coil drivers on the market without requiring the usage of a much heavier voice coil than required for the design. The key to the SA series is, in fact, the perfect balance of motors force to mass. We have maintained that delicate balance in the v.2 through extensive testing and optimizations.

We then borrowed the new frame, aluminum surround bolt-on clamps, and aluminum vent rings that we tooled for the U-Series to further bring the SA to new heights of performance and reliability. At this point you can think of it as a little brother to the U Series.

Of course if you still prefer the original, legendary, SA series we re-launched it as the “Classic” and it will remain in production in 10s and 12s.

—–

This 18 inch model features a larger motor than the SA-10/12/15 v2 at a full 205mm diameter and a 60mm magnet stack height. The top plate is also thicker in order to more effectively move the higher mass 18″ soft parts. It has a large 234mm diameter spider pack for very high mechanical stroke capacity. It utilizes the same 2.75″ coil as the other SA v.2 series for a 1000-watt RMS power rating.

—–

List of upgrades compared to the v1 SA series (Rev.1,2,3):

1) Magnet outer diameter increased from 180mm to 190mm
2) Magnet slugs increased from 25mm to 27mm in height (total 4mm more height)
3) Motor structure fully bolted together with 3x M6 bolts (eliminates the possibility of motor shifting)
4) Top-Plate “Slits” implemented as with the X and Z series. Increased cooling & reduced distortion.
5) Improved gap venting — more / flared gap vents.
6) Improve pole-vent design — smoothly flared on both sides.
7) Coil increased from 63.5mm (2.5″) to 70mm (2.75″) in diameter. Higher thermal capacity.
8) New “U series” style cast-aluminum frame for taller cones (more x-mech both top-side from cone to spider and bottom from spider to top plate)
9) Aluminum cast gasket to bolt-on surround.
10) Aluminum cast vent ring to enhance thermal transfer from motor to the frame.
11) Standard with double “XL” leads and “bolted-on” spider
12) Larger and thicker surround (same tooling as U series).
13) Strongest paper cones we have ever produced… new two-piece mold technique.
14) “Large Flange” dust cap just like our larger woofers. Essentially eliminates dust-cap glue failure.
15) Larger spider diameter on the 12/15″ models (the 10″ retains the same 188mm spider)… 12″ up to ~200mm and 15″ up to ~210mm
16) Improved spider material for longer life.

  • Xmax = 19mm one-way by 70% BL
  • RMS Power = 1000-watts
  • Vented magnetic gap
  • Optimized high-velocity pole vent
  • Innovative high-velocity vented frame spacer ring
  • Black Aluminum 2.75” voice coil former for superior heat dissipation
  • High Temperature copper voice coil wire
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On Double “XL” Tinsel Leads to prevent fatigue and failure
  • High strength cast aluminum frame
  • Optimized for small ported, sealed, & band-pass enclosures
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T/S SPECS SAv2 15″ D2 SAv2 15″ D4
RE (Ohms) 3.89 5.83
FS (Hz) 36.8387 37.4160
VAS (L) 51.9387 45.3391
Qes 0.5847 0.6963
Qms 5.1005 5.7094
Qts 0.5245 0.6206
Le (mH) 3.6326 4.7903
BL (NA) 24.4656 29.1578
Mms (Grams) 388.9706 431.9464
Cms (uM/N) 47.9860 41.8886
Sens (dB @ 1w/1m) 88.22 87.08
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 2.0 cu ft
Ported Enclosure 3.0 cu ft
Recommended Tuning 35Hz
Recommended Port Area 44 sq in
Displacement
Depth
Outside Diameter 15.59″
Cut-Out 14.01″
COMING SOON… Enclosure designs by

The Sundown SA series has been our most popular line since its original introduction in 2009. What better way to create a new version 2 than to upgrade, literally, every single part of the woofer? We started with a larger, more powerful motor to drive the larger 2.75” coil and stronger soft parts – this maintains the perfect balance of the original SA series while also increasing the power handling to 1000-watts RMS.

When designing the SA v.2 series we started out with an FEA optimized motor & coil design capable of 19mm of one-way linear excursion by 70% BL and just over 35mm of x-mech. This motor & coil setup was then mated up to an extremely robust double-layer spider with fully tied-on & doubled-up “XL” tinsel leads (84-Strands of Conductor per lead), 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.

We further improved the voice coil cooling system from the original SA series. This system allows our 2.75″ coil to match and exceed the thermal performance of many competing 3″ coil drivers on the market without requiring the usage of a much heavier voice coil than required for the design. The key to the SA series is, in fact, the perfect balance of motors force to mass. We have maintained that delicate balance in the v.2 through extensive testing and optimizations.

We then borrowed the new frame, aluminum surround bolt-on clamps, and aluminum vent rings that we tooled for the U-Series to further bring the SA to new heights of performance and reliability. At this point you can think of it as a little brother to the U Series.

Of course if you still prefer the original, legendary, SA series we re-launched it as the “Classic” and it will remain in production in 10s and 12s.

—–

This 18 inch model features a larger motor than the SA-10/12/15 v2 at a full 205mm diameter and a 60mm magnet stack height. The top plate is also thicker in order to more effectively move the higher mass 18″ soft parts. It has a large 234mm diameter spider pack for very high mechanical stroke capacity. It utilizes the same 2.75″ coil as the other SA v.2 series for a 1000-watt RMS power rating.

—–

List of upgrades compared to the v1 SA series (Rev.1,2,3):

1) Magnet outer diameter increased from 180mm to 190mm
2) Magnet slugs increased from 25mm to 27mm in height (total 4mm more height)
3) Motor structure fully bolted together with 3x M6 bolts (eliminates the possibility of motor shifting)
4) Top-Plate “Slits” implemented as with the X and Z series. Increased cooling & reduced distortion.
5) Improved gap venting — more / flared gap vents.
6) Improve pole-vent design — smoothly flared on both sides.
7) Coil increased from 63.5mm (2.5″) to 70mm (2.75″) in diameter. Higher thermal capacity.
8) New “U series” style cast-aluminum frame for taller cones (more x-mech both top-side from cone to spider and bottom from spider to top plate)
9) Aluminum cast gasket to bolt-on surround.
10) Aluminum cast vent ring to enhance thermal transfer from motor to the frame.
11) Standard with double “XL” leads and “bolted-on” spider
12) Larger and thicker surround (same tooling as U series).
13) Strongest paper cones we have ever produced… new two-piece mold technique.
14) “Large Flange” dust cap just like our larger woofers. Essentially eliminates dust-cap glue failure.
15) Larger spider diameter on the 12/15″ models (the 10″ retains the same 188mm spider)… 12″ up to ~200mm and 15″ up to ~210mm
16) Improved spider material for longer life.

  • Xmax = 19mm one-way by 70% BL
  • RMS Power = 1000-watts
  • Vented magnetic gap
  • Optimized high-velocity pole vent
  • Innovative high-velocity vented frame spacer ring
  • Black Aluminum 2.75” voice coil former for superior heat dissipation
  • High Temperature copper voice coil wire
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On Double “XL” Tinsel Leads to prevent fatigue and failure
  • High strength cast aluminum frame
  • Optimized for small ported, sealed, & band-pass enclosures
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T/S SPECS SAv2 18″ D2 SAv2 18″ D4
RE (Ohms) 3.97 6.06
FS (Hz) 29.051 31.868
VAS (L) 114.234 106.964
Qes 0.424 0.458
Qms 3.052 2.853
Qts 0.372 0.395
Le (mH) 3.6326 4.7903
BL (NA) 32.523 38.159
Mms (Grams) 619.174 549.519
Cms (uM/N) 48.474 45.389
Sens (dB @ 1w/1m) 90.1 90.7
ENCLOSURE SPECIFICATIONS
Sealed Enclosure 3.5 cu ft
Ported Enclosure 4.5 cu ft
Recommended Tuning 35Hz
Recommended Port Area 66 sq in
Displacement
Depth
Outside Diameter 18.66″
Cut-Out 16.69″
COMING SOON… Enclosure designs by

The Sundown SA series has been our most popular line since its original introduction in 2009. What better way to create a new version 2 than to upgrade, literally, every single part of the woofer? We started with a larger, more powerful motor to drive the larger 2.75” coil and stronger soft parts – this maintains the perfect balance of the original SA series while also increasing the power handling to 1000-watts RMS.

When designing the SA v.2 series we started out with an FEA optimized motor & coil design capable of 19mm of one-way linear excursion by 70% BL and just over 35mm of x-mech. This motor & coil setup was then mated up to an extremely robust double-layer spider with fully tied-on & doubled-up “XL” tinsel leads (84-Strands of Conductor per lead), 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.

We further improved the voice coil cooling system from the original SA series. This system allows our 2.75″ coil to match and exceed the thermal performance of many competing 3″ coil drivers on the market without requiring the usage of a much heavier voice coil than required for the design. The key to the SA series is, in fact, the perfect balance of motors force to mass. We have maintained that delicate balance in the v.2 through extensive testing and optimizations.

We then borrowed the new frame, aluminum surround bolt-on clamps, and aluminum vent rings that we tooled for the U-Series to further bring the SA to new heights of performance and reliability. At this point you can think of it as a little brother to the U Series.

Of course if you still prefer the original, legendary, SA series we re-launched it as the “Classic” and it will remain in production in 10s and 12s.

—–

This 18 inch model features a larger motor than the SA-10/12/15 v2 at a full 205mm diameter and a 60mm magnet stack height. The top plate is also thicker in order to more effectively move the higher mass 18″ soft parts. It has a large 234mm diameter spider pack for very high mechanical stroke capacity. It utilizes the same 2.75″ coil as the other SA v.2 series for a 1000-watt RMS power rating.

—–

List of upgrades compared to the v1 SA series (Rev.1,2,3):

1) Magnet outer diameter increased from 180mm to 190mm
2) Magnet slugs increased from 25mm to 27mm in height (total 4mm more height)
3) Motor structure fully bolted together with 3x M6 bolts (eliminates the possibility of motor shifting)
4) Top-Plate “Slits” implemented as with the X and Z series. Increased cooling & reduced distortion.
5) Improved gap venting — more / flared gap vents.
6) Improve pole-vent design — smoothly flared on both sides.
7) Coil increased from 63.5mm (2.5″) to 70mm (2.75″) in diameter. Higher thermal capacity.
8) New “U series” style cast-aluminum frame for taller cones (more x-mech both top-side from cone to spider and bottom from spider to top plate)
9) Aluminum cast gasket to bolt-on surround.
10) Aluminum cast vent ring to enhance thermal transfer from motor to the frame.
11) Standard with double “XL” leads and “bolted-on” spider
12) Larger and thicker surround (same tooling as U series).
13) Strongest paper cones we have ever produced… new two-piece mold technique.
14) “Large Flange” dust cap just like our larger woofers. Essentially eliminates dust-cap glue failure.
15) Larger spider diameter on the 12/15″ models (the 10″ retains the same 188mm spider)… 12″ up to ~200mm and 15″ up to ~210mm
16) Improved spider material for longer life.

  • Xmax = 19mm one-way by 70% BL
  • RMS Power = 1000-watts
  • Vented magnetic gap
  • Optimized high-velocity pole vent
  • Innovative high-velocity vented frame spacer ring
  • Black Aluminum 2.75” voice coil former for superior heat dissipation
  • High Temperature copper voice coil wire
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On Double “XL” Tinsel Leads to prevent fatigue and failure
  • High strength cast aluminum frame
  • Optimized for small ported, sealed, & band-pass enclosures

POWER THEM WITH ONE OF THESE AMPS

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