4 kanaler

Ground Zero GZFA 4.100 Ferrum 4 kanaler med auto on/off

Ground Zero GZCA 500.Q1 High SPL Competition Amplifier

Ground Zero GZCS A-4.80 4x80W RMS @ 2 ohm - testet Klasse D microforsterker

Ground Zero GZIA 135.4 4x140W @ 2 ohm - NY! Iridium 4 kanaler med auto on/off

Ground Zero GZHA Mini FOUR 24V 24 volt 4 kanaler klasse D

Ground Zero GZRA 4HD 4x275W @ 2 Ohm Radioactive 4 kanaler klasse D

Ground Zero GZPA Reference 4 PURE Reference 4 kanaler

Ground Zero GZPA 4SQ EISA vinner 2018 - 2019

Ground Zero GZHA Mini FOUR Hydrogen 4 kanaler klasse D

JL Audio - HD600/4 forsterker 4x150W HD serien 4 kanaler med R.I.P.S.

JL Audio - 300/4v3 forsterker 4x75W Slash v3, klasse A/B

JL Audio VX400/4i - forsterker med DSP 100W x 4 , klasse D, NexD2™ , LP filter