X SERIES (Discontinued)

X-REV1-THUMB

The X series is the first driver in the Sundown woofer line-up to offer our “ultra high excursion” suspension and frame designs. The 10, 12, and 15″ models feature our custom tooled and patented frames (US Patent Numbers D691596, D691597, D691598) and the 18″ model uses the tried and true 18″ 6-spoke with a custom tooled adapter to allow for a full 10″ diameter spider. We mate these new platforms to a triple stacked 190mm diameter motor structure featuring a hyper-extended pole and extreme clearances (allowing up to 4″ p-p travel before mechanical bottom). This motor powers a 3″ diameter 4-layer CCAW coil wound on a thick, black aluminum former to incredible levels of excursion.

The X series was designed from the ground-up to become the new standard in the low-frequency / small ported box subwoofer category in this price range. They will work in anything from our traditional very small enclosures (like the SA and Z v.3 series) up to about 50% larger than those suggestions for the maximum amount of low-frequency extension.

The X series is really a different kind of woofer due to it’s incredibly linear suspension. They are designed for the LOWEST level of bass extension possible while maintaining low levels of distortion. They are NOT a peaky SPL woofer — these are true low distortion, high excursion bass transducers!

Due to the extremely low level of suspension induced distortion the typical “punchy” upper-bass peak in the 40s-60s Hz range that occurs with traditional woofers when pushed to high excursion does not occur. This “punch” is caused by a tightening of the suspension over stroke leading to increased FS and Qts figures — in other words it is distortion. In simpler terms — the X series frequency response does not change much over it’s full excursion range provided a consistent and flat response at any volume level. Once you experience and re-listen to all of your favorite music on a low distortion driver you are unlikely to go back!

T/S SPECS X10D2 Rev1 X10D4 Rev1
RE (Ohms) 3.8 6.1
FS (Hz) 27.8 29.8
VAS (L) 18.4 17.5
Qes 0.44 0.54
Qms 5.30 5.37
Qts 0.40 0.49
Le (mH) 2.93 4.04
BL (NA) 22.3 25.1
Mms (Grams) 328.0 300.3
Cms (uM/N) 0.10 0.09
Sens (1w/1m) 81.4 81.2
ENCLOSURE SPECIFICATIONS
Sealed Enclosure Not Recommended
Ported Enclosure 1.5 cu ft
Recommended Tuning 32Hz
Recommended Port Area 24 sq in
Displacement 0.21 cu ft
Depth 8.88″
Outside Diameter 11.65″
Cut-Out 10.01″
T/S SPECS X12D2 Rev1 X12D4 Rev1
RE (Ohms) 3.8 6.1
FS (Hz) 25.3 26.5
VAS (L) 31.5 28.6
Qes 0.45 0.53
Qms 5.02 5.15
Qts 0.41 0.48
Le (mH) 2.84 4.07
BL (NA) 22.9 27.5
Mms (Grams) 389.9 393.0
Cms (uM/N) 0.10 0.09
Sens (1w/1m) 82.4 81.9
ENCLOSURE SPECIFICATIONS
Sealed Enclosure Not Recommended
Ported Enclosure 2.5 cu ft
Recommended Tuning 32Hz
Recommended Port Area 40 sq in
Displacement 0.20 cu ft
Depth 9.67″
Outside Diameter 12.68″
Cut-Out 11.09″
T/S SPECS X15D2 Rev1 X15D4 Rev1
RE (Ohms) 3.8 6.1
FS (Hz) 22.9 22.6
VAS (L) 91.2 90.2
Qes 0.47 0.61
Qms 5.11 5.37
Qts 0.43 0.55
Le (mH) 2.80 4.10
BL (NA) 22.1 25.0
Mms (Grams) 421.9 438.4
Cms (uM/N) 0.11 0.11
Sens (1w/1m) 85.5 84.2
ENCLOSURE SPECIFICATIONS
Sealed Enclosure Not Recommended
Ported Enclosure 4.25 cu ft
Recommended Tuning 32Hz
Recommended Port Area 68 sq in
Displacement 0.22 cu ft
Depth 10.85″
Outside Diameter
Cut-Out 13.83″
T/S SPECS X18D2 Rev1 X18D4 Rev1
RE (Ohms) 3.8 6.1
FS (Hz) 21.6 22.5
VAS (L) 222.0 205.8
Qes 0.55 0.67
Qms 4.85 5.49
Qts 0.49 0.59
Le (mH) 2.65 4.25
BL (NA) 20.9 24.4
Mms (Grams) 466.0 461.4
Cms (uM/N) 0.12 0.11
Sens (1w/1m) 87.9 87.3
ENCLOSURE SPECIFICATIONS
Sealed Enclosure Not Recommended
Ported Enclosure 7.0 cu ft
Recommended Tuning 32Hz
Recommended Port Area 112 sq in
Displacement 0.23 cu ft
Depth 10.25″
Outside Diameter 18.42″
Cut-Out 16.69″