Originally Posted by dazkyl
I ran my 5.1 system in small for every speakers. Today, some guys told me that my sub is not good enough because its a jamo 8'' 250 sub , and it does not match with my jamo s608 fronts. So i will be setting my fronts to large. What about the crossover in the receiver ? and what about the gain on the back of the sub ? Room is 4.3m x 4.6 meters.
How could a Jamo sub NOT match up with Jamo fronts? I think the question is simply how much sub do you want? I suspect that the Jamo 8", even though it is not a huge sub, still offers more/better deep bass, and more LF impact than the 608s, which are only rated down to 37Hz. Have you experimented with trying different crossovers, such as 60Hz and 40Hz? I would suggest a 60Hz crossover to start. Also, be aware that if you set your fronts to Large, you will tax the power supply of your receiver/amp a lot more.
Now, I do like to set my front L/R speakers to large, but I have a separate amp to power them. And they are rated down to 22Hz. But given your current towers, if you really want deep bass, you will need to get a more substantial sub, with response down to ~20Hz.