Look for speakers with high sensitivity, 95 dB or higher. Klipsch, Cerwin Vega, DCM, and Acoustic Research should have some that work for you. Get the big floor standers. Also, tell your friend to get a hearing aid - he will need it sooner than he thinks because that loud music will destroys his hearing very quickly. At the very least tell him to turn down the treble control - the higher frequencies do the most damage.
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!