Dear all,
In the not so distant past I integrated my sub with my front two towers and obtained a far better low frequency response at the listening position than could've been from the towers alone. Ultimately the sub was placed equidistant from the side walls and directly behind the listening position as I'd found that drawing the sub away from the rear wall gave the best results (and this was as far forward as I could draw it).
Even though the
low frequency response waterfall was (I feel) pretty good overall, I found that with the sub (crossed at 80Hz) being so close to the listening position, whilst I couldn't locate it from sound alone, I
could locate it from floor vibration and over time found myself distracted and wanting to shift it elsewhere in the room.
With this in mind, today I setup my RS meter and calibrated ETF to approximately 80dB. After a fair bit of trial and error, I found a spot for the sub at the side of my couch which I feel gives an overall better
low frequency response waterfall than before, and of course the sub is now far enough away that I can't 'feel' it.
This is where things start going downhill.
After finalising the low frequency response, I took a look at the
full frequency response and couldn't believe how awful it was. Consequently, the
1/3rd octave plot, which is more indicative of what we hear than the full frequency plot, showed a large null around 2kHz. Out of curiosity, I switched 2ch mode on my receiver off and turned on Direct analogue, thereby changing from having my sub integrated to only using the front two towers, and to say the least, I am totally perplexed.
Clearly with the sub
not integrated the
low frequency response waterfall isn't as good as when the sub
is integrated, but for some reason that I simply cannot fathom, the
full frequency response is (relatively) normal, as then is the
1/3rd octave plot as a result.
After all of the above, my question to any and all is:
what is causing the difference between integrated and non-integrated full frequency response plots? I've checked in the receiver's menu and the PEQ and GEQ are turned off, so it's not this or DSP modes that're somehow interfering. Logically, it would seem that the sub is doing something, but then, how can it be? After all, beyond 80Hz, the sub's output is attenuated to zero due to the crossover.
