5th Gen 4 Runner Stereo Upgrade . The sound quality is poor and I'm thinking of upgrading the whole sound system. These upgrades are too little, too late. 500Q OEM Audio Plus Step By Step Install & Review - 5th ... (Mabelle Pratt) The sound system upgrade started with. The sound quality is poor and I'm thinking of upgrading the whole sound system. We drove off with the stock stereo in our Laredo, thinking we could upgrade later. The sound system upgrade started with. Upgrading the system really was pretty simple, just took some time. Trail 4Runner - 5th Gen 4Runner Blog & Forum - Trail4R.com Improving stereo sound in 5th gen - Page 3 - Toyota ... 4RunnerStunner's 2011 5th Gen JBL w/Navigation Speaker ... Improving stereo sound in 5th gen - Page 2 - Toyota ...