Billy Mack

If You Want "Big" Sound You Need Big Speakers It's only logical that if you want big sound with deep clean base you need big Speakers. I have read claims by some builders that their 6.5 inch based or smaller Loudspeaker can match or exceed the sound quality and quantity of a much larger driver based Loudspeaker. The laws of physics say higher frequencies don't require much air movement, but for every octave drop in the audio spectrum the driver has to be capable of moving 4 times more air to keep the same output level (loudness). Simply put, deep base requires you to move a lot of air, something a small audio driver cannot do so don't fight the real facts, just accept them. So now your considering using a 15 inch audio driver in your loudspeakers but are concerned that your loudspeakers will have too much bass and they will sound unnatural; don't worry, they won't. They will sound very similar to those quality 6.5 inch Speakers at low to mid volume levels. They will just be more capable of delivering much louder clearer bass than the 6.5 inchers when asked. They will only sound boomy if your enclosure is too small; remember keep the Qtc to 0.707. https://diyaudiospeakers.5150.ca/types.html

This is very important and its worth repeating (Qtc 0.707 stuff); you must match your drivers to the enclosure and I am not just talking about the size of circular hole in the front of the audio speaker enclosure. Most audio drivers are now designed to be used in a specific type of enclosure with a specific volume (size). So when deciding upon your audio drivers you have to take into consideration the type of enclosure (ported, sealed) and the enclosure size recommended by the manufacturer. If their recommendations are not available you will have to take the other information that is given such as Fs, SPL, Vas, Qms, Qts, etc and figure that out for yourself. You can do that by using various complex mathematical equations or by simply plugging in the information about the driver into any of the many audio loudspeaker building software programs that are available. Okay, you now know to match up your audio speaker drivers to the enclosure size and type recommended; you have to do that with the midrange audio speaker also if it is not-rear sealed . The reason why you build an enclosure within an enclosure for a non-rear sealed audio speaker is that you'll want to isolate the air spaces behind the driver and midrange from each other to prevent them from "pushing" on each other. The volume of air displaced by a large woofer moving in and out can destroy the much smaller midrange driver and even if it doesn't, they will interfere with one another causing distortions which is not a good thing to have happen. Don't forget to add the total volume of the midrange enclosure to the audio speakers enclosure's total volume. Don't worry about building a separate enclosure for the tweeter; every tweeter that I have ever seen is rear sealed so the driver's air pressure won't affect it. https://diyaudiospeakers.5150.ca/types.html