By Joe Brusi • January 25, 2013 At 100 Hz, we can now see some kind of alien hand with five fingers. What's going on? Fig. 10: Powerhouse alley with two subwoofers spaced 14 m (47 ft). Figure 10 shows the alley for two single subwoofer boxes spaced 14 meters (47 feet). It is not as obvious graphically as it is audibly, but it can still be distinguished as an approximately 4 meter (13 feet) band with more intense color. . Conclusion The only real way to avoid the powerhouse alley is to place all subwoofers in a single location. With smaller scale applications, placing all the subwoofers in the center is normally not a possibility, but the larger shows may benefit from flying subwoofers in the center. It is important, however, to understand what is happening, so as not to blame the speakers. And being aware of the zones that get created before taking mixing decisions. For instance, if the FOH console is located in the centre, we could chose a mix that is somewhat bass-heavy when listened to along the center line. Off to the sides destructive interference will kick in and establish some frequency balance between the low frequencies and the rest of the system. Read the rest of this post 1 2 3 Comments Have something to say about this PSW content? Leave a comment! Cancel reply Scroll past the ”Post Comment” button below to view any existing comments. Your email address will not be published. Required fields are marked *Comment Name * Email * Website This site uses Akismet to reduce spam. Learn how your comment data is processed. Tagged with: Sound Reinforcement Subwoofers · all topics Subscribe to Live Sound International Subscribe to Live Sound International magazine. Stay up-to-date, get the latest pro audio news, products and resources each month with Live Sound. Subscribe Today!