Thanks guys for helping me. I feel like I should at least have somecontributions by telling what I think about the amp and the seller.
Hifonics z8000
Pros- good size for a 5 channel amp- good price for power, quality and realibility- I had Alpine MRV-f357 b4. Same quality with more output.
Cons- low S/N, >90. (Honestly, Can you tell?)- no remote bass control for this model- hard to mount ( I dunno how to use the mount parts provided, maybe I am just stupid)- 8000zx is newer model and have lower price.
For the Seller, John Kim,
[email protected], San Jose- Not the lowest price. (low already) but Very NICE and HONEST- When I bought the amp, I thought there's problem with the 5th channel. He told me to go back to him and exhange. I was late for 2 hours because of traffic and he was supposed to leave for work. He still waited for me. After I tried the new amp, I found the it's in fact the problem of my Sub. He didn't complain at all.(maybe he actually wanted to kill me in his heart). And He just let me take the newer amp. What a seller! He is a korean fob.