Atlantic Technology H-PAS PowerBar 235 Powered Home Theater Soundbar H-PAS technology generates bass so deep and powerful, you don't need a subwoofer Legendary Atlantic Technology home theater performance Sophisticated Digital Sound Processing with Dolby Digital, Dolby ProLogic and DTS delivers an enveloping multi-channel home theater experience Perfectly-matched integrated amplifier creates theater-level Sound Pressure Levels and impact Unique speech enhancement circuit improves intelligibility over background noise