I just read the following post by Terry Dillon in Certified Disc Jockeys Group. From personal experience, I disagree with him. What say you? Quote: This could be a full day seminar, but here it is in one post smile emoticon We often talk about having the appropriate equipment for an event. In this respect, there are a few considerations. First, matching the SPL with the venue and number of guests expected. Each TYPE of event will present you with a different SPL need. Corporate events, ballroom dancing, live singers and/or guitarists will primarily have requirements focusing on the mid-high frequency ranges. As a result, a lower SPL is required, and in general wider coverage is preferred. This is where the Bose sticks solution comes in. While very low in SPL, the array mids-highs allow for wider room coverage. However if the event is a wedding or party where there will be plenty of dancing, then the Bose sticks simply wont cut it. As they are rated at only 115db MAX rating (short bursts), 112db normal max rating, the sound will greatly dissipate at 2m...4m...8m. The Inverse Square Law tells us that for every doubling in distance, 6db is lost, so 112db at 1m would drop to 94db at 8m. Unfortunately, the benefit of the Bose array speakers are lost when it comes to SPL, as the higher the frequency, the more directional the sound waves. This means that the array speakers (pointing different directions), will have less SPL the further from the source. Once we factor in guests, the sound will diminish even further by the time it reaches 8m. In the center of the dance floor, the optimal SPL would be 110db to 120db. With Bose under OPTIMAL conditions, wed see 94db BEFORE guests arrive (allow for a 6db drop once the floor is half filled). Again, just to clarify how important it is to use the appropriate equipment, lets calculate how many speakers the Bose system would need to add to go from 94db (lets say theres NO loss of sound because Bose is wonderful wink emoticon to 110db (minimum suggested SPL center of dance floor). Remember the 3db rule, it takes either DOUBLE THE POWER, or DOUBLE THE NUMBER OF SPEAKERS for every 3db gain in SPL. 110-94 = 16db. 16/3 = 5 (and a bit)... So we need to DOUBLE the number of speakers FIVE TIMES to reach 110db in the center of the dance floor. 4 speaker Bose system to 8 speakers... 16... 32... 64... 128 speakers. Yes this is true. Even if it only needed to double twice, youd be looking at 16 speakers to do the job of one set of speakers designed for the purpose. This isnt a jab at Bose, as they are wonderfully designed speakers and used in the right settings, they sound amazing. Heres some additional information to help clarify some details and provide further insight. Hope this helps
Posted on: Fri, 23 Jan 2015 04:20:41 +0000
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