SP-1812AP SP-158AP SP-K615AP SP-K618AP SP-1563AP SP-156AP
SP-155AP SP-115APM SP-112APM SPM-155AP SPM-152AP SPM-122AP

  Front View / Rear View
  Manual / Dimensions

The 1812AP is a compact, dual powered, one 18” subwoofer, bass-reflex rectangular enclosure, designed for portable systems an a dual channel STK digital power amplifier(very light weight) with active X-over is incorporated into the system.
The one power outputs didicated to powering internal 18” SK18600S woofer, the other one power outputs may be used in of two ways(see to the bellow drawing)


  • Dedicated subwoofer system and full range active systems.
  • The enclosure construction: “STK Standard”
  • Ultra tough, the scratch proof warnex texture coated
  • Two side handles one on each side for easy repositioning.
  • Impact-resistant perforated metal grill(1.5mm)with weather proof powder coated.
  • 35mm pole mount receptable on the top.
  • “SCP” STK caster, “SPM” STK pole option.
Model SP-1812AP
System configuration Powered Subwoofer
Components & Loading One SK18600 18”, Bass-reflex
Operating Mode Active
Frequency Response  
±3 dB 40Hz ~ 300Hz
-10 dB 35Hz ~ 300Hz
Axial Sensitivity(dB SPL, 1 watt @ 1m) 100
Nominal Input Impedance(ohm) 4
Power Handling(Watts, Continuius) 600
Power Handling(Watts, Peak) 2400
Calculated SPL Limit
(Referenced to 1 m)
Peak 133, 8dB
Long Term 127, 8dB
Optional Accessries 1 STK Caster "SCP80" or "SCP100"
Optional Accessries 2 STK Pole "SPM35130"
( ±0.13 inch / ±3 mm)
Height 640
Front width 568
Depth 595
Trapezoid angle(degrees)  
Shipping/CBM 0.3188
Net weight 49.9 kg
Shipping weight 65.7 kg
Output Power  
4 ohm 600W x 2 (Internal In, External In)
8 ohm 390W x 2 (Internal In, External In)
Frequency Response 20Hz ~ 40kHz
THD 20Hz ~ 30 kHz 0.05%
S/N Ratio
(Filter : A-waiting, RMS)
Input Sensitivity +4dBm(1.23V)
Damping Factor >300
Crossover Frequency 1. 90Hz 24dB/Oct
2. 120Hz 24dB/Oct
Low cut Filter 30Hz 12dB/Oct
Input impedance 10k ohm (Balanced XLR)
Connectors Input 2 x Female XLR
Connector output 1. 2 x Male XLR(Mixer out)
2. 1 x Neutrik type speakon
Power Requirements 1600 Watts
Special Features 1. Sig LED, Cilp LED, PRT LED
2. Digital Power
3. Variable speed fan
4. Low Distortion AB class
5. 7 Way Full Circuit Protection
6.AC Out Let for Satellite Active Speaker
*Specifications subject to change without notice.
Copyright © 2007. stkpro.com All right reserved.
E-mail : stkcom@stkpro.com