Pros: Class D (Runs Cool), Small, Clean, Powerful. Louder than you can stand and no distortion. Good built-in crossover with DBO.

Cons: Cops apparently don't like your stereo to be louder than their sirens...

Opinion: Everyone thinks their equipment is the best and after spending so much time researching all the different models I can say I am very happy with my amp. Infinity gear is top notch, they are geared toward accurate music reproduction and true fidelity. This amp is a perfect match for the Kappa speakers as they are 2 ohm.

Notes: Another review stated that the power terminals are unprotected...Not true, they are encased in clear plastic and are not a risk for sparking.

Equip: JVC KW-AVX820, Kappa Five, Kappa 693.9i, Kappa 60.9cs, 2 Farad Cap... Haven't decided on the Sub...

I have 2 of these units that i bought 10 months ago. One is in my car and the other in my son's car. Mine is still working great and his went out causing the speakers to squil. He was always adjusting his (teenager) but he did know what he was doing. I got mine set the way I like it and had no issues.
We are running kappa 4oms speakers/sub with a rockford head. Make sure that you put spacers (1/4" min) between the unit and what you are mounting it to or it will overheat. The techs with Sonic helped me order the system and helped me with hook up. So far with the return of my son's amp they have been very courteous and helpful. I havent recieved the replacement yet. So this review may change if it doesn't go smoothly. Overall i would recommend the whole Kappa line.

Best Bang for your money, does the job quit well, I have for 4 months and performs flawless. When I listen load music it runs hot but no problems.

The build quality of the amp is excellent. I may have just got a defective item. 2 of the channels for the speakers do not put out their full potential power. I have tried switching rca's and I even bought a new deck and new speakers because I thought the outputs were messed up on my Panasonic deck. Come to find out, putting all of that new equipment in did nothing. It has been the amp the whole time. But who would have known? It's a "new" amp. The two channels that actually worked sounded great paired with some rockford T1 components. I would suggest this amp if you can get one that works.

Excellent 5 channel sound, very compact and even after an hour of hard use was only warm.

The power and speaker connectors are not insulated. They are exposed and stick out significantly from the amp. The power connector sticks out at least one inch with the 4/0 AWG adapter. I don't have to tell anyone what would happen if a metal object were to contact the power connectors. Yes, the power wire is fused with a 100 amp fuse, but there will still be a lot of sparks on the way up to 100 amps, and some damage.

The other amps I've seen have insulated power and speaker connections. The Kappa Five will require me to fabricate some type of insulating cover to protect all the exposed (and hot) connectors.

Wish I would have paid better attention to that before ordering. My bad. This amp may work well for your installation, but be warned about the exposed connectors and take appropriate action to protect it.

I'll post a further review of operation & reliability if I decide to keep it, if that's possible.

Maybe it doesn't matter so much, but I'm a former aircraft electrician for 20 years in the Navy. I've seen plenty of sparks fly with a lot less current. If I keep this amp, you can bet those connectors will be shielded, and good.

The "2" rating for the design is for the connector issue alone. With insulated connectors, I would give the design a five and bump the other ratings up at least one point.