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

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The SP155AP is full-range Bi-Amp 500W amplified enclosure with one 15” SK15500 low frequency drivers vented.
Especially designed for most applications requirement to Hi-Quality sound and a low distortion, high output with broadest bandwidth.
The internal bi-amplified 400W low frequency and 100W high frequency actual power delivered.
The internal mixer module includes one for balanced line level inputs and one for balanced thru line XLR jacks it use to daisy-chain active speaker systems of the same signal source.

  • 2-Way full-range system.
  • The one 2” SK60D exit compression drivers on a “SABS2” horn.
  • Ultra tough, the scratch proof warnex texture coated.
  • Impact-resistant perforated Metal grill with weather proof powder coated.
  • 35mm pole mount receptacle on the bottom.
  • With or without flying hardware options for eyebolt joint.
Model SP-155AP
System configuration 2-Way full-range
LF Components & Loading One SK15500 15”, Bass-reflex
HF Components & Loading One 2 inch voice coil compression driver
Operating Mode Active(BI-Amp)
Frequency Response  
±3 dB 53Hz ~19kHz
-10 dB 46Hz ~ 20kHz
Axial Sensitivity(dB SPL, 1 watt @ 1m) 101
Nominal Input Impedance(ohms)  
Power Handling(Watts, Continuius) 400
Power Handling(Watts, Peak) 1600
Normal Dispersion(H x V) 85 x 85
Calculated SPL Limit
(Referenced to 1 m)
Peak 133dB
Long Term 127dB
Optional Accessries STK Pole "SPM35130"
( ±0.13 inch / ±3 mm)
Height 704
Front width 480
Rear width 350
Depth 480
Shipping/CBM 0.258
Net weight 34.18kg
Shipping weight 38.66kg
Output Power  
4 ohm 400W (LF)
8 ohm 100W (HF)
Frequency Response
20Hz ~ 40kHz
THD 20Hz~30kHz 0.05%
Hum & Noise ≥70 dB
Input Sensitivity + 4 dBm(1.23V)
Damping Factor ≥300
Active X-Over Frequency 1.8kHz
Input impedance 20k ohm (XLR/BAL)
Connectors Input XLR/BAL(Line In)
Connector output XLR/BAL(Through)
Power Requirements 700 Watts
Special Features 1. Sig LED, Cilp LED, PRT LED, Peak LED
2. Variable speed fan
3. Low Distortion AB Class
4. 7 Way Full Circuit Protection
*Specifications subject to change without notice.
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Tel. 82-32-525-1788~1789 Fax. 82-32-525-1784   E-mail : stkcom@stkpro.com