Originally Posted by stockmonkey2000
Moggie - I just tested out my subs for the first time. My experience is the same "outrageous and uncontrolled" - there is no decay in the bass notes they all just blend together. I am curious to hear your impression of how the subs changed as you got everything tuned and the room treatments in. I wasn't expecting them to sound good at this point I was only making sure the drivers work but was just curious how they changed for you as you completed your room.
You have a journey ahead towards sonic perfection
An IB sub definitely needs EQing. That together with a completely bare room will mean that it is going to sound a mess initially. If I recall I saw (I mean heard) three big steps in improvement:
(i) the first was after the bass treatments. In my case this consisted of the front corner bass traps, 4" of treatment on front and rear walls (faced on rear), the majority of the soffit and, although somewhat unproven, my rear riser. After this was installed the bass was at least listenable.
(ii) installation of furniture. I could definitely hear the difference after 6 large chairs were installed...
(iii) EQ. This took a while and a lot of experimentation. My front row positioning is not great (close to room center) so I definitely got an advantage from my rear subs although learning to EQ two sets of immovable subs was a learning exercise. In the end I used a Berhinger DCX2496. Connected a single sub output from my pre to the DCX. Split that into 3 outputs (front sub, rear and buttkickers), added delay to the rear subs to get the best initial response at my listening positions, EQed the front IB first (including adding some <20hz boost -- had plenty of headroom), then tweaked the rear. Once all this was done I ran Audessey on the pre to EQ the main speakers -- it did very little to the subs. The EQ was done with all the room treatments and carpet installed and this made another substantial improvement.
Bottom line is that it is too early to audition your bass performance...