DML Speaker Wall - How to Wire Multiple Exciters

[@alexrogers4510]

Looking forward in seeing the results

[@consumertechcheck]

Me too, I’m no drywaller..finishing this wall is taking forever!

[@miguelcurto3455]

Hi, could you share details on the capacitor? I'm assuming it's working like a passive cross over? Would it be the same if driving one or two exciters?

[@consumertechcheck]

Yes, it is exactly a passive crossover in every way. Just a simple capacitor in line to roll off at 6db per octave.

[@lmccleary411]

Very cool project! I'm planning on something like this for a future build when we build our new home but i plan to frame out a larger area in the wall like you do for a window to have a larger flexible area to get better bass , my thoughts are to wire two exciters in parallel first, then take those pair and run them in series back to the amp to get back to a 4 ohm load . I have been into a local audio shop that makes custom speakers for museums and churches that are audio focused sound with custom speaker arrays that actively delay sound to focus it in a small area like an museum exhibit so the audio is only heard right in front. In their meeting room in the shop they put exciters in the wall but I never asked about specs of the build , since then the owner has passed and his wife outsourced their work somewhere else and they have since sold their building to a company that is trying to cure cancer I think . I have been working on dml speakers for awhile and love to play with them I have found it works best to have a light weight material that is large and compressively strong in the axis of the speaker but some what flexible in the plane of the material , everyone online uses extruded polystyrene foam but I haven't tried that yet, I believe I have come up with something better using quarter inch foam core board like you get at an arts and craft store like hobby lobby , but the larger the panel the better bass so I buy larger foam core board that is black and matt finish from uline.com , the panels are 30 in. x 40 in. x 3/16 in. thick . I have a custom 3d printed bracket that I mount two 24 watt exciters to. The high frequencies come from the middle directly in front of the exciters, and the bass comes from the outer edges of the panel, and if you mount the panel by string and hang it from the top edges of the panel , you greatly reduce the bass output , so I'm working on making a frame to have hooks in the mid point of the panel between the exciters and the outer edges to then hang it to the frame with string . I also want the frame to mount to the back magnet of the exciter so that more energy goes into the panel. On another project my friend and I took 16 exciters and put them all over a panel and glued another panel to the back of the magnets and wired them down to a 4 ohm load , but once done it was horrible, apparently the saying "if some is good then more is better" is wrong in this aspect, because we had a really loud speaker but with no bass at all , we then realized that the harmonic resonance of the panel is very important to get bass so having a non-flexible panel is not ideal or having multiple exciters all across the panel , you really want them in a small central area around the middle of the panel or using a 2/5- 3/5 rule . . if you are interested , I could build you a pair of my dml panels with two 24 watt exciters either at 2 or 8 ohm load but without the frame , I haven't gotten around to making that yet , but if you cover a little bit of the costs I'd send you a pair to check out I think they are amazing for what they are.

[@consumertechcheck]

Logan, I am very interested in learning more about your project. It sounds like a great option. I am surely interested in getting my hands in a set. Email me at [e-mail] to set something up

[@antoniiocaluso1071]

what happens when the 3M glue strip dries out? I'm guessing, the drivers start vibrating loose, no? Maybe better to skip the strip, and epoxy-set 'em to the drywall paper, yes?! I've been wrong before 🙂 HOWEVER...there is no worse placement of Exciters than within a wall & attached to a drywall panel's interior surface. Ask any Builder why, or...dinkaboutit. An Exciter's special qualities is its "open-ness". As shown here, only 1/2 the wave is audible, and further constrained by VERY-non-resonant panel surfaces. Capice'? 🙂

[@consumertechcheck]

The epoxy is a brilliant idea. There is a good chance I am doing this project again… when I do… I will epoxy them in place for that very reason.

[@brianarrington4569]

Yo this guy just likes to talk.. this is the third video about the speaker's where we have not heard the speakers.. are we going to hear the speakers 3 months and 10 videos from now??

[@consumertechcheck]

Brian, I have good news… there will be a video showing the sound, uploaded within a day. Trust me… it sounds terrific! You’ll see.

[@billymacktexasdetective5827]

Unless you go to where they are physically installed, you'll never hear them...