our headphones will sound better than ever. Experience your music with crisp detail, full bass and unmatched clarity with the AmpCase. This gorgeous, form-fitted case for iPhone 4 and iPhone 4S maximizes the sound quality of your headphones by using Alesis' exclusive DSP technology and a linear power amplifier. INCREDIBLE SOUND Your premium headphones may look great, but they’ll only sound as good as what they’re plugged into. AmpCase makes headphones sound incredible. You'll finally experience your music like it was intended to be heard. AmpCase receives a direct injection of unadulterated, noise-free audio directly from your iPhone’s 30-pin dock connector. This unrestricted and uncolored signal enables you to enjoy the full dynamic range of any song. Alesis DSP technology pushes the best output to your headphones, with improved presence, punch and power. The AmpCase's linear power amplifier drives signal-thirsty headphones with authority. FORM-FITTED FASHION Enclosing the iPhone completely, AmpCase includes contoured cutouts for all of your iPhone’s controls. A large wheel on the side gives you precise, continuous volume control, and a mini USB jack lets you charge your iPhone without removing it. AmpCase's sleek, protective design features brushed metal and a trim profile that perfectly complements your iPhone. It looks as good as it sounds. Experience your music like never before, and get the best out of your headphones with AmpCase from Alesis.