THE DIY SUBWOOFER NETWORK

Dayton Audio Max-X 10" Subwoofer in a 1.5 cuft Ported Enclosure   Josef Anton Hofmann was a physicist, audio expert and entrepreneur.   In addition to earning  Ph.D. in physics from Harvard and working on the Manhattan Project he was a co-founder or partner in no less then three groundbreaking audio companies; KLH (the H stood for Hofmann), Advent, and Acoustic Research.  These companies, which today are all shells of their former selves, were the giants in hi-fidelity home audio back in their heyday.  Acoustic Research, for example, was the first company to produce an acoustic suspension (i.e. sealed) loudspeaker.  Interestingly enough a simple sealed speaker enclosure was not invented until the 1950's by Edgar Villchur, the founder and president of Acoustic Research, while the vented enclosure was patented by a scientist Bell Labs in the 1930's.   Kicker Comp R 12 in a 2.5 cuft Ported Enclosure   We would not have the field of acoustics, much less the market for hi-e

 If you shop at Parts Express then you need a coupon!  Here are a few for you! Unfortunately the old Parts Express coupon codes have all expired, I am working with them to get some more set up and I will update this page ASAP!

We now offer custom enclosure design services!    The first stage of the box design is to  click right here and complete this google form .   If I have any questions I will send you an e-mail, if not then I will send you an invoice.  I require 50% up front before I start the design.  What do you get when you order a custom design? A box designed for your needs, and plans based on your tools and skills.    A Custom Designed Slot Port Complete computer modeling, based on your specific subwoofer . Before drawing up plans I model the box, including including the frequency response, the port airspeed velocity, and the cone excursion.  This will let us know if the box you want is the box you need.  Since there is no perfect box you will know the compromises that went into the design phase and the consequences of those compromises.  For those that want a no-compromises enclosure you need a dose of reality, or you need to find somebody else to design your enclosure.   Complete plans with di

    One of my patrons over on Patreon wanted some help with a box design.  He is trying to fit a 12" subwoofer in the middle of the floorboard of his crew cab pickup truck.  For the driver we are using Dayton Audio Reference High Output 12" subwoofer .  The enclosure is 2.5 cubic feet and tuned to 32 HZ.  For the port we went with a 2" by 19.5" slot port that is 36 1/4" long.  The f3 is 28 HZ.  Here are the frequency response and cone excursion plots from WINisd.     Frequency Response Ported (Green) vs Sealed (Blue) Cone Excursion Ported (Green) vs Sealed (Blue) For more information on how these were modeled in WINisd give this video a look:   If you would to build the box for yourself the you should be able to piece it together with the dimensions in these in these pictures. Front Back Left and Right Side   Top and Bottom Port Detail Window Brace Here is a cut list for  your convenience. Cut List

In this post I am going to share with you plans for a home theater subwoofer with some interesting design elements.             Parts Used* Dayton Audio Classic Series 4 Ohm 12" Subwoofer Young 300 W Plate Amplifier B52 3" x 5 " port flares Birch Veneered Plywood Wood Glue Birch Edge Banding Clear Poly Textured Coating Pocket hole screws Cap Head Hex Wood Screws Brad Nails 5 minute epoxy Polly-Fill Quilt Batting Sound Deadener   2 Design Goals    The hardest part of building a speaker is making it look good, especially if it is a budget build.  Wood veneer is a simple solution that that looks great, but it can really run up the cost of a project.  It is no more expensive to use cabinet grade as compared to veneering MDF.  The problem with plywood is the exposed layers on the edges. Some people like the look, I don't.  So, this design is going to make use of overhangs to cover as many edges as possible, and edge banding to cover the rest. As far as the sound goes,

What exactly is a Bandpass Subwoofer?  Let’s take a look and see!   Along the way we will dispel some popular myths about bandpass subwoofers.   Forth Order Bandpass Subwoofer Enclosure The image above shows a speaker enclosure with the subwoofer mounted on an internal baffle that divides the box into two separate airspaces.   One of those chambers is sealed, one is ported.   At first glance this seems like an odd configuration.   How does it make any sound if the speaker is inside of the box?   The answer is simple once you understand that a port is just a speaker made out of air.   As the air in the ported side of the enclosure is compressed and decompressed it causes the air in the port to move back and forth and the port produces the sound.   A common myth is that the subwoofer driver makes the sound and the port “let’s the sound out”.   That is not accurate, what you are actually hearing is the sound waves produced by the port itself. DIY 4th Order It turns out that there