The Sound Town Class-D plate amplifier enables you to build your own powered speaker cabinet. The STPA3L-150D power amp is equipped with two 1/4” line inputs, two 1/4” mic & XLR combo inputs, one 1/8” AUX input and one XLR loop output connector. The built-in Bluetooth allows you to connect with your Bluetooth enabled mobile devices instantly. The onboard two-band EQ per input channel helps tune the sound to your preference. Simply turn the treble or bass knob and adjust the level of high or low frequencies to match your audio signal perfectly.

The plate power amp generates 150W RMS (8-ohm) and comes with overload protection. When paired with the right speaker driver and enclosure, it produces clear and massive sound to reinforce your PA system.

  • 150W Class-D power amplifier plate
  • 2-channel 1/4" line inputs, 2 XLR and 1/4" mic combo input and 1 1/8” AUX input
  • 1 XLR loop output 
  • Bluetooth connectivity
  • 2-band EQ with bass and treble control


Model STPA3L-150D
Description 3-channel input plate amplifier
Type Class-D
Supports Impedance 4Ω & 
Power 150W RMS
Feature Bluetooth, 3-channel input
Input 2-channel 1/4" (LINE) / 1/4" & XLR combo (MIC) + 1 channel 1/8" (AUX) / Bluetooth
Output XLR (3-channel loop out)
Control Master volume; each channel: treble, bass, gain
Protection Overload and overcurrent protection
Technical specifications Full-range; Crossover point: 2.5k hz
Voltage 110V-220V switchable
Speaker model# reference KALE-208BPW

Dimension & Weight

Product Width (in.) 5.20" Package Width (in.) 8.66"
Product Height (in.) 14.44" Package Height (in.) 15.75"
Product Depth (in.) 2.76" Package Depth (in.) 6.10"
Product Weight (lb.) 4.0 lbs Package Weight (lb.) 5.28 lbs


Manufacturer Warranty 1 Year