Hifonics bg3300 ,and 1000.4 The high phonics brutus gamma line is probably the best amplifier line?Hi phonics has to offer. these are Orion x Tr pro.Amplifier clones. everyone knows orion next to is his near bulletproof is an amplifier gets. The bg 3300 has been dyno tested to clip at 13.8 volts it produced between 2700- and 2900 watts RMS by two different independent test . It wasn't tested dynamic RMS to clip ,but i bet if it was if would get 3300 its rated for. the 4 Chanel is rated at 125 watts ×4 . These are real hifonics amplifiers, not ebay hifonics. The boards are Orion designed. They are beautifully crafted and built . No plastic, this set is 30 pounds of cast heat sink and guts . this set originally cost$ 850 dollars. They are new ,open box . Come with a real hifonics warranty, not an Amazon warranty. These amplifiers are everyday music enthusiasts tailored. Not spl amplifiers. they sound Beautiful