The quality of your subs makes a huge difference The accuracy of the sub is extremely important. If you don't have, or can't rent a spectrum analyzer you will just need to go by ear. You just have to experiment with a spectrum analyzer at different points in the room to find the best median. They will also change as you move around the room. Using a Spectrum Analyzer is the best way to find these types of problems. Although sound waves are constantly colliding with each other, the majority of problems will be in the lower spectrum. In some cases, and at certain spots in the room, the phase cancellation can cause the bass to not be heard at all. If the wave shapes line up opposite of each other, they will cause "Phase Cancellation". If the wave shapes line up with each other perfectly, they can cause a boost in certain frequencies. When they bounce back, those same sound waves pass each other or collide. As sound comes out of the speakers they reflect off of the walls and different objects. The smaller the room the more problems, the larger the room, the easier it is to deal with them. When it comes to problems with room environments and sound the bass will usually give you the most problems. I have some training in Home Theater Sound. I'm not sure if this is your problem or if it relates. Thanks again Glenn, probably should have just called GIKs in the first place. I think if I were to treat this room again, I would have just put up all monster bass traps and TriTraps and not bothered with the 242's. The two panels above my head made a drastic improvement. That said, I do think I could do without them since the room treatment made such a huge difference in the first place. I just dawned on me, that my new mix position is dead center between the monster bass traps that I have next to the side walls on stands.Īnyway, I think I will keep the subs in place (since I already own them) and just scoot back a little further in the room. It is right about in the same place as my mix position is now. I should have thought of that since one day I took my TLM103 with a pair of headphones on and walked all over the room trying to find the best place to record my vocal. That places my head at about 42% from front wall. I moved my head back about 8 -10 inches and i think I found a sweet spot. Subs are both 5.72' from the mix position and the tops are both 4.52' I hooked it up properly, and did another RMC test. I had decided to hook the subs back up and get the correct numbers, a realized a stupid thing I did.I had the audio connections feeding the subs on the -10 inputs instead of +4. What am I doing wrong? Should I just skip the subs?Īlso, I went from SPDIF to Analog as a test to see if that was causing some kind of issue. My mixes seem to play back with more low frequency rumble than I thought I heard when mixing. The tops are getting corrected as follows: Left Front 158Hz, 2.99Q and -8.5dB Right front 140hz 7.38Q and -8.5dB I dont recall that dB, but it think it was only a 2.5dB cut. The JBL RMC corrects the subs both at 19.2 hz. I have tried 80hZ and it didint seem to matter. I am currently crossing over at 50hz, since the 4328s have solid bass response down to 50hz. n the mix position they are about 6 feet from the front and 6 ft from the side walls. On the couch, my ears about 3ft from the back wall. If I sit on the sette in the back of the room, the bass frequencies seem much louder than at my mix position. Here is the deal.I cant seems to tell if the subs are doing any good or not. I also tried putting a sub in my mix position and it seems to produce the strongest bass response in the current locations when I went around the front of the room on my hands and knees. I tried them at different places around the front and it didnt seem to matter. I have (2) JBL4312 subs that are spaced with the cones about 1/3 distance from each side wall and the back of the cabinets are about a foot from the front wall. I then have (8) additional 242 panels on the walls at reflection points, and a pair of Monster Bass Traps on stands that are basically against the side walls in line with my ears.įor speakers, I am using JBL4328P monitors on 36" stands, tilted slightly down so the tweeters point at my ears. (2) 244 panels and (1) 242 panel across the back wall, with a leather sette (loveseat size sofa) up against the panels. I have a 4x4 area of 244 panels suspended from the ceiling over my mix position. My mix position is at about 38% back from the front of the room and in the center. I have treated the room with the help of GIK acoustics (great to work with, BTW) I have the corners coverd with TRI-Traps from floor to ceiling. I have a room that is 8'H x 12.5'W x 15.5'L with an added little hallway in the right back corner that about 4' W and 4' L leading to the door.
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