The Sound Town Class-D plate amplifier enables you to build your own powered subwoofer cabinet. The STPA21-710 power amp is equipped with 2 XLR-1/4” combo inputs and 2 XLR (through) outputs. It handles formidable 500W RMS power. Each of the speaker output generates 125W RMS power and allows you to connect two passive PA speakers with the amp. The plate amplifier also comes with master volume control, Low Pass Filter (LPF) adjustment and a polarity switch.

  • 500W RMS plate power amplifier
  • Two speaker outputs with 125W RMS output each channel
  • 2 XLR-1/4” combo inputs, 2 XLR (through) outputs
  • Over current and short circuit protection
  • Sturdy and reliable


Model STPA21-710
Description 2.1-channel plate amplifier (subwoofer + 2 satellite)
Type Class-D
Impedance Supports 4Ω & 8Ω
Power 500W + 2 x 125W RMS
Feature 2.1-channel, LPF
Input 2 x XLR-1/4" combo (mic/line)
Output 2 x XLR (thru)
Control Subwoofer: volume, LPF, polarity; Satellite: volume, HPF, balance
Protection Overload and overcurrent protection
Technical specifications LPF 40-300 Hz; 200Hz HPF on/off
Voltage 110V-220V switchable
Speaker model# reference METIS-15/18SPW2.1, CARPO-15SPW

Dimension & Weight

Product Width (in.) 10.9"
Product Height (in.) 14.9"
Product Depth (in.) 6.3"
Product Weight (lb.) 17.9 lbs


Manufacturer Warranty 1 Year


Customer Reviews

Based on 1 review Write a review