amplifier - I designed a 4 Resistance biased amplifer, I used the Voltage divider MOSFET amplifer circuit for 2N7000 - Electrical Engineering Stack Exchange
BOSS Audio Systems R1100M-S Riot Series Car Audio Subwoofer Amplifier - 1100 High Output, Monoblock, Class A/B, 2/4 Ohm Stable, Low/High Level Inputs, Low Pass Crossover, Mosfet, Hook Up To Stereo -
BOSS R3004 RIOT 1200 Watt 4 Channel MOSFET Car Audio Amplifier
3pcs 4-Channel PLC Amplifier Circuit Board MOS FET PWM 3-20V to 3.7-27VDC 10A Driver Module: Amazon.com: Industrial & Scientific
TDA7850 MOSFET Class AB Audio Car Power Amplifier Board 50W*4 | eBay
Riot 400-Watt 4 Channel Car Power Amplifier Amp Mosfet R1004-WMT - The Home Depot
Amazon.com: MOS FET PWM 3-20V to 3.7-27VDC 10A 4-Channel Driver Module PLC Amplifier Circuit Board : Electronics
SOUND STORM LABORATORIES 400-Watt 4-Channel Car Power Amplifier Amp Mosfet SSL, Black (2-Pack) 2 x EV400.4 - The Home Depot
Source Enthusiast MOSFET TDA7850 4-channels Car Audio Amplifier Board 4X50W on m.alibaba.com
Zen 4 10W Mosfet pure class A SE amplifier PCB one set( 2pieces) - JIMS Audio