What you are looking at is an ULTRA RARE Diamond Audio D7401 1 channel amplifier! Diamond Audio has always been known for making STRONG and very Dependable Amplifiers!!!! This amp is VERY powerful and sounds crystal clear! Very High quality!!! Check out my store for more amps and tons of other OLD SCHOOL CAR AUDIO!!!! I am a 16 year Ebayer with over 2600 positive feedback!!! I ship fast and take pride in my items when I ship them. THANKS AND GOOD LUCK!!!! BTW - All my items ar...e sold AS IS!!! I fully test and record each item working before i sell it!!! I am a trusted Ebayer and do not do this to scam ANYONE!!!