Speaker set up & sub connection

[dhiru79]

Good Morning,
Please could you guide me in the right direction of setting the speakers & sub, as my subs not giving deep bass out as they should be. I have done the distance and Levels to 75db all speaker and increased subs to 80db as it doesn't sound right. I have set the front & center speaker to large 12db Octave and Enhance Bass on and subs left/right dual mono. also tried setting to small and crossover 60hz, 80hz 90 hz still doesn't sound right. Subs are placed at the front near the front KEF R700. Svs sb 4000 is connected via XLR cable and SB 3000 connected via XLR TO RCA.Please if you guide me would be much appreciated. Many Thanks.

This is setup i have:
KEF R700
KEF R600c
KEF R300
KEF R50 Atmos used as heights
SVS SB4000
SVS SB3000
Emotiva XMC-2
Emotiva XPA-9 Gen9

[ttocs]

My first guess would be that you are sitting in a null were bass is weak. Location, location, location.

Using only one subwoofer, sit in your seat and play tones starting at 100Hz and listen for how loud it sounds. Then begin lowering the frequency and listen for when they "sound" less loud and then get louder again, if it does get louder because it may not. Using an SPL meter is preferred for this.

Another way to figure out what's going on is, again, with only one sub on, move it several feet at a time and see if the bass improves. I spent two days recently moving both of my subs all around my room, and I mean EVERYWHERE, while measuring with sweeps to figure out where the best locations would be.

One way to picture what happens with nulls in a room, and the same with peaks, is to draw a frequency curve on a sheet of paper, then with another sheet, cut out a square hole. Then hold the square hole over the freq curve and move it left and right. This is exactly what happens when you move the subwoofer in one direction in the room. By moving the sub you move the null. The object is to move the null away from the seating area. If you need to move the null 5 feet, then the sub will need to move 5 feet - somewhere else.

Simplified explanation, but hopefully it gets the point across.

[dhiru79]

Thanks for the reply, will give a try.