Everest DD66000

[JuniorJBL]

It is not the speaker that is sensitive to the room, it is the room that is sensitive to speakers and sound in general.

[macaroonie]

I have now moved my speakers 5 inches closer to the backwall/corner.
it ment more to the Sound that I could imagine..
The bright Sound is gone, and the low end is more powerfull.

I would never think that the placement hat such a big impact.
Is it because of the double woofer that it is more sensitive to roomgain.??

Placement is crucial with respect to room response. You may well have had a cancellation in your first position.
Every room is different.
Glad to hear you have found an improvement , I suggest you continue to try small adjustments to the position.
Its a good idea to mark the floor with tape now that you have found a good spot.

Happy listening.........M

[4313B]

I suppose you don't own the Everest DD66000?
You really should not worry because of the datasheet low end roll off of these speakers. In my room I have flat response down to 20Hz.

G.T. reiterated that just this morning: "Our measurements are made in a chamber with the ports pointing to the rear. The curves are very misleading regarding the true low frequency output of the system in a room."

Additionally, those published curves were the curves used in LEAP to design the crossover filters as opposed to showing exactly how low the system would go in an actual room. If I remember correctly, the large anechoic chamber is good down to ~ 25 Hz which means that there is going to be very little, if any, boundary reinforcement in the first octave. The anechoic chamber curve bears that out.

In short, the published response curves of the DD65000, DD66000 and DD67000 mean very little with respect to the response of the systems in the bottom two octaves in an actual room. JBL no longer takes measurements of their loudspeaker systems in "the pit" facing up towards the sky. It would be pointless to do so with the rear ported Everest II in any case.

At one point I posted that the Everest II was tuned around 30 Hz. It is in fact tuned around 34 Hz. What this means is that output it solid down to around 34 Hz and then the system will begin to roll off without any boundary reinforcement.

Guido already knows all this. This is for general reference.

In my room I have flat response down to 20Hz.

No doubt!