Can i used this for my mid voice or is it for bass only?

You should have a subwoofer to do this properly. I had a double 15" woofers with 10" horn and (4) 4" tweeters which was one tower by Rockville and used with a Rockville 18" subwoofer and it worked great.

What are all the components i need to connect this sub in a room 3.5mm? will someone link me them?

Your question doesn't make sense, using a 3.5mm connection? Will require a sub amplifier and most likely 3.5mm female to rca jack.

I'm planning to build 2 of this speakers in a speakerbox but wich amp can I use best to power the subs?

In response to the first answer: any 5000 watt amp would be excessive and ultimately would fry your two speakers...unless you want to wire 4 of these in a series-parallel wiring, 5000 watts is wwaaayyy too much.

Subwoofer Diameter	15 Inches
Item Weight	5.44 kg
Is Waterproof	False
Number of Items	1
Control Method	Remote
Speaker Size	15 Inches
Power Source	Corded Electric
Batteries Required	No
Manufacturer	Audiosavings
Item Model Number	RVW1500P8
Size	15 inch
Wattage	1500 W
Product Dimensions	19.05 x 40.64 x 40.64 cm; 5.44 kg

Rockville RVW1500P8 1500w 15" Raw DJ Subwoofer 8 Ohm Subwoofer 70oz Magnet

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