A. Use an external accessory speaker such as the Poly-Planar MB41 ($70), which plugs into the back of the radio. Manufacturers such as Icom and Standard Horizon also offer these as options. The larger speaker produces louder, clearer audio than the small speakers built into your radio. For best effect, mount it directly facing you. For maximum volume, remote speakers like the Standard Horizon MLS-310 ($70) with built-in amplifiers and a volume control work great.