I’ve posted a few times in here with questions re my first DIY project (2 18” Dayton HOs, 1 EP4000)…. Just finished one sub so figured create a new thread to post pics…and more questions. I’ll break out my real camera and take more pictures while assembling the next sub and will post them here too. I hope to finish the 2nd sub this weekend and then take some measurements and get everything calibrated.
For now, here are a couple pics I took with my cell phone.
I used Erich’s 4 cu ft flat packs (which were great btw). For this first sub, I used PL Premium and ended up assembling the entire cabinet at once and using 4 ratchet tie downs and 6 bar clamps to hold it together while it dried. This ended up working out OK but I did use my small belt sander to even up around the seams since the PL expanded a bit and caused the pieces to not be perfectly flush in some places. The sander also helped clean up where PL got smeared around the seams. I’ve since bought Titebond II and plan to assemble the 2nd sub with it piece-by-piece, which I think will result in less time needed for clean up/sanding/etc.
I went with Duratex and a foam roller for the finish. I think I ended up with 3 coats but wasn’t quite able to get the finish I’d wanted. I ended up with more texture than I’d prefer and could never get 100% rid of the roller lines. If anyone has suggestions to avoid the roller lines, please let me know.
To mount the driver, I used hurricane nuts that were secured to the cabinet with small squares of plywood I’d glued to the MDF (read to do this on another thread). I’ve read mixed reviews about using hurricane nuts but didn’t have much trouble with them (a couple bolts took a few minutes to get in b/c the holes weren’t perfectly straight – took a little wiggling to get the bolt to thread into the nut but eventually went in fine).
I tested the sub briefly last night and was relieved to hear that it definitely works. First impressions are good and it sounds like it goes lower than my Epiks so I’m interested in seeing its measurements. I’ll post the measurements here once I take them.
One concern though – I hear a slight hum coming from the sub when everything is hooked up and powered on. I imagine it’s related to a ground loop issue; I’ve been using a Hum-X device with the BFD I used for my Epiks (this eliminated the hum entirely). Last night, I unplugged the BFD and used the Hum-X for the EP4000 which seemed to reduce the hum but did not eliminate it entirely. If I put my ear near my mains’ tweeters, I also hear a slight buzz coming from them. The hum would not be noticeable during a movie but think I’d perceive it during soft parts of music. Any thoughts on what’s causing this hum and how to eliminate it? Or is a slight hum from the EP4000 typical?
BTW, unplugging the coax cable had no impact with the BFD/Epiks; and I tried running a ground b/n the BFD and AVR which had no impact.