Need for metal sound please~

I really want my guitar sounds metal~I am using a Ibaenz
RG series guitar~my amp is a samll cheap Samic amp.
I also got a Zoom 505 effect pedel~
but I feel my bass is not enough~ and also~ what 's the
difference between single coils and double coils??
I heard that double coil sounds heavier~is that true?
and what does pick ups do?
please help me~ thanks you~^^

i used to a cheap samic, but now i have a fender Devill.i suggest you use:

Monster cables

dunlop picks

and deffinetly a humbucker for more low end chunk

also use ernie ball heavy bottom skinny top guitar strings thats what i use and i play DethmetaL.

use the Boss MT-2 METAL ZONE it has low and chunk and to go with that buy the BOSS GE-7 equalizer to shape the sound, and hook the EQ pedal up first and put the treb,bass,mids on your amp all at zero and use th EQ peadal for treb,bass,mids.

if you need help on how st set them up post a message and then ill tell you how to get the sound you want.