Bluetooth Multi-Channel Hybrid Pre-Amplifier System - 3000W Home Audio Rack Mount Stereo Power Amplifier Receiver w/Radio, USB, UHF, Dual Wireless Karaoke mic, Speaker Sound System - Pyle PWMA4004BT

6-Channel Bluetooth Hybrid Home Amplifier - 2000W Home Audio Rack Mount Stereo Power Amplifier Receiver w/Radio, USB/AUX/RCA/Mic, Optical/Coaxial, AC-3, DVD Inputs, Dual 10 Band EQ - Pyle PT6060CHAE

Pyle Auto 2-Channel Bridgeable Marine Amplifier - 200 Watt RMS 4 OHM Full Range Stereo with Wireless Bluetooth & Powerful Prime Speaker - High Crossover HD Music Audio Multi Channel System PLMRMB2CW

TORO TECH – MRx2, 150w x 2 RMS @ 4 Ohm – 250w x 2 RMS @ 2 Ohm Micro Sized Multi Channel Car Amplifier, Sound Quality Class D Design, Built-in Auto Sensing Turn-On, Full Range or Subwoofer Speaker

IEC 61290-10-1 Ed. 1.0 b:2003, Optical amplifiers - Test methods - Part 10-1: Multichannel parameters - Pulse method using an optical switch and optical spectrum analyzer