Completed cabinets, I did line them with batting and added a couple of pounds of fill in each box
Internals of an EPX4000
Finally got my second amp back today. For some reason they shipped me a 2800 along with a 4000. They took care of it but set me back almost 2 weeks. I think I am just going to try and use rubber mounts on the stock fans first before changing them. The mounts quieted the fans in the wall unit down a lot.
I thought there might be some criticism for the bracing. The driver pretty much consumes the entire front baffle and the magnet goes past the midpoint of the box. Guess I could have done a tic-tac-toe type brace. I chose to do minimal bracing and keep the internal volume as high as possible due to my very specific box dimensions required. Had no plans to use 18's just decided to try and shoe horn them in when I got fed up with waiting over 5 months for the Rythmik kits. There is not much, if any vibration on the cabinet surface at what would be my normal music levels. Yesterday put on a rap song that I do not listen to and set the volume up to -15 and it was very loud. Closed up the house and went outside to see how much I would be bothering the neighbors. Not to bad really. I could feel entire outside of the house was vibrating with the "booms" when my hand was placed on the outside wall. I do feel the cabinet surface slightly vibrating when the volume is that high. IMO the bracing is fine. Everything else is vibrating more though so I dont think I will notice any coloring of the bass. There are not any buzz's or rattles in the room at this point. Had to work today so no time to play. Hope to finish set up and get some measurements next week.
You should be able to see the recess of the double baffle in the pics. Was actually worried about the single thickness driver mount point after handling the drivers. Smashed my finger pretty good setting one of the drivers in place, those things are heavy! What happened with my PM's? I know it seemed like I was maybe dragging my feet, but I was just busy with work. no big deal though,
What are those speakers your running there....
Finished the switching relay and have everything installed. Have been trying to troubleshoot an annoying hum that comes into play when the AS-EQ1 is inserted inbetween the AVR and sub amps. Have not had a lot of time to tweak. Did find some time today to do a quck run with Omnimic. have not had a lot of time with that program either. Here is a full range graph with my two mains and the two subs crossed at 80hz. Graph is 1/6th octave.
That is assuming you have the input attunators (gains) on the ep's all the way clockwise...
|Tc Sounds Lms Ultra 5400|