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WWW.SOUNDSTREAM.COM 

 

Congratulations on your new Soundstream sub-woofer purchase. We 
greatly appreciate your business. This may look like a run-of-the-mill 
cardboard box, but it’s actually a protective barrier over one of the 
finest engineered and assembled sub-woofers available.  

Harmonic Indulgence…   Listen and Feel

 

Features, Parameters, & Dimensions 

series wired  

SPLX-122HX  SPLX-152HX 

Fs

 (

Hz)

 

31.77 25.25 

Qms

  

4.14 3.13 

Vas (

ft³

)

  

1.302 5.029 

Cms (mm/N)

  

.0996 .129 

Mms (g)

  

252.8 309.1 

Rms (kg/s)

  

12.15 15.6 

Xmax (mm)

  

18.6 18.6 

Xmech (mm) 

27.9 27.9 

Piston Diameter (in) 

10.04 13.19 

Sd (in²)

  

79.16 136.6 

Qes

  

.45 .43 

Re

 

(

3.8 3.8 

Z

 

(

)

 

4 4 

BL (Tm)

  

20.55 20.89 

Rms Power

 

(watts)

 

1000 1250 

Qts

  

.41 .378 

NO (%) 

.253 .514 

1w/1m SPL

 

(dB)

 

86.18 89.5 

2.8V SPL (dB) 

89.4 92.49 

Voice Coil Diameter (in) 

3 3 

Impedance (

DVC 2

 DVC 

2

 

M-vd (ft.

3

.188 .298 

Overall Diameter (in) 

12.625 15.25 

Overall Height (in) 

8.125 9.25 

Mounting Depth (in) 

7 8.375 

Cutout Diameter (in)  

11 14.125 

Motor Diameter (in) 

7.75 7.875 

Motor Height (in) 

3.5 3.5 

Flange Width (in) 

.875 .75 

Flange Height (in) 

.75 .625 

Weight (lbs) 

34 35 

Aluminum Voice Coil Former 

Epoxy Coated Pulp Paper Cone 

UV Coated Foam Surround 

Dual NOMEX Spiders 

ABS Injection Dust Cap 

Vented T-Yoke 

Suspension Integrated Tinsel Leads 

Cast Aluminum Basket 

Copper Clad Aluminum Voice Coil 

8 ga. Compression Wire Terminal 

94 oz. Ferrite Magnet 

Embossed Back Plate 

WWW.SOUNDSTREAM.COM 

 

Soundstream does not provide enclosure dimensions as there are 
infinite variables when designing a box, i.e. vehicle, amplifier, music 
preferences, etc… For designs tailored to your specific needs, please 
contact us at tech-support@soundstream.com, or 1-800-724-1377. 

Enclosure Dimensions 

All enclosures should be made of .75” (3/4”) material only. When 
possible, make the baffle 1.5” (1 ½) thick and add .75” (3/4”) to the 
depth of the enclosure to compensate. All volumes INCLUDE vent/
port and subwoofer displacements. DO NOT change the volume 
unless you plan on adding a substantial amount of bracing. For 
added performance, applying a coat of fiberglass resin to the interior 
walls will greatly improve sealing the enclosure. Adding a thin layer 
of poly-fill will improve response by smoothing out reflections 

within the enclosure. 

Enclosure Construction 

Enclosure Recommendations 

SPLX-122HX High Tuning 

SPLX-122HX Low Tuning 

Vol. 

(ft.

3

Vent             

(dia. X L) 

Freq. 

(Hz) 

-3dB 

(Hz) 

Gain 

(dB) 

Vol. 

(ft.

3

Vent             

(dia. X L) 

Freq. 

(Hz) 

-3dB 

(Hz) 

2.00  (2) 4" x 9.25"  55.2  43.5  7.7  2.5  (3) 3" x 13.75"  40.1  33.4 
3.00  (3) 4" x 8.25"  55.2  42.9  8.8  3.5  (3) 3" x 11.75"  35.1  29.5 
4.00  (4) 4" x 7.5" 

55.4  42.7  9.4  4.5  (3) 3" x 12.25"  30.1  26 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPLX-152HX High Tuning 

SPLX-152HX Low Tuning 

Vol. 

(ft.

3

Vent             

(dia. X L) 

Freq. 

(Hz) 

-3dB 

(Hz) 

Gain 

(dB) 

Vol. 

(ft.

3

Vent             

(dia. X L) 

Freq. 

(Hz) 

-3dB 

(Hz) 

3.00  (2) 4" x 4.5" 

54.9  44.3   7  3.00  (2) 4" x 13.75" 

40  36.3 

4.00  (4) 4" x 8.5" 

55 

43.5   7.7  4.00  (2) 4" x 12.25"  35.1  31.7 

5.00  (6) 4" x 11.25" 

55 

43 

 8.1  5.00  (2) 4" x 13.5"  29.9  27.8 

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