Replace all speakers in the 2007 H3 Base
 

Hi, im wondering how many pairs of speakers i need to buy. I want to replace all my speaker in the hummer h3. Do i need the 2 front, two back, and 2 tweeters? Thank you

2- 6.5" or 6.75" 2 way (full range) for the rear either will fit.
2- 6.5" or 6.75" components for the front. Max tweeter size is 1" . You will need to run wires for the tweeters or use a bass blocker on the OEM wires. The OEM tweeters already have a bass blocker integrated into their housing.

Mine has stock speakers and a pioneer feeding the stock amp, sounds amazing

I am in process to replace all my door speakers with Polk DB651.

So far I've replaced only fronts and I AM LOVING IT, it's awesome.

I need to replace my speakers too, because just one big speaker and two small one are working right now in my truck. So I need to replace three big OEM speakers. But I don't know how to do it? Is it hard to do it by myself?

It's very easy. Google H3 door speaker replacement, there are a couple writeups on it.

Easiest way is buy focals new integration line. Drop right in with your existing system