2013 Harley Street Glide The Moto line of speakers are specifically built to sound great on motorcycles, while riding. No other speaker on the market is designed like these. The client brought us the Harley with the Sony radio already installed. We just had to add the excitement! The angled top of the Arc Audio Moto amplifier provides clearance for the motorcycle fairing. The Arc Audio Moto 6×9 speaker was specifically designed to be used in motorcycle applications. The HogTunes bag lids integrate the Arc Audio 6×9 speakers into the top of the saddle bags for a OEM look.