Wisdom Ls3, Руководство пользователя

Страница: 13 / 26

13
The ultimate in dedicated listening room construction involves the design and
construction of floating walls, ceiling and floor. This approach yields the added
benefit (when done properly) of providing outstanding acoustic isolation from
adjacent spaces as well as superb bass reproduction. This approach goes well
beyond the scope of an owner’s manual; if you are interested, you should con-
tact a professional acoustician who has specialized in this sort of domestic room
design. (Note that most acousticians’ are not in this category.)
Speaker Placement
Within the room itself, placement of the speakers and the listener will have a
profound effect on the performance of the system, particularly below 300 Hz
or so. There is no “perfect” position that will solve all problems, but finding the
best compromise will make it easier to solve the remaining problems with the
SC-1.
Your Wisdom Audio dealer can help you with optimizing your speaker place-
ment, which is never quite as simple as it seems it should be. The characteristics
you should listen for are several:
Left & Right Speakers
Goal #1: Stable, 3-dimensional stereo imaging
This usually requires reasonable symmetry within the room, and a bit of space
between the speakers and adjacent side walls (to minimize the adverse effects
of early first reflections). Mono (correlated) pink noise can help here, though it
does not replace listening to music. With pink noise playing in both speakers,
you should hear a tightly-defined little “ball” of pink noise floating in space ex -
actly halfway between the speakers.
Goal #2: Smooth, consistent bass
Oft-cited rules of thumb for smoother bass reproduction include both “placing
the speakers at different distances from the side walls vs. the wall behind them,”
and “placing them at ‘odd fractions’ of the room’s dimensions” (e.g., fractions
in which the denominator is an odd number, like
1
⁄
3
,
2
⁄
5
,
2
⁄
7
, etc.). But nothing
replaces your experience in your room, combined with your dealer’s experi-
ence in a variety of rooms. Playing pink noise through the bass sections of your
Wisdom Audio speakers (with the microphone at the listening position, and
prior to doing any equalization) and watching the results on a Real Time Ana-
lyzer (RTA) will let you see the results of your labors.
Center Channel
Center channel height
Once you have a solid stereo image up front (when listening only to the Left and
the Right speakers), you need a center channel speaker for multichannel repro-
duction. It should be centered between the Left and Right, and centered on the
screen’s location, preferably at the same height as the Left and Right speakers.
This presents an obvious problem: you cannot place a speaker in front of your
television screen.
Ideally, a center channel speaker would be behind an acoustically transparent
front projection screen and would match the Left and Right speakers. Doing so
would ensure the best possible consistency of tonal balance, image height, and
dynamic capabilities for the critical center channel.
Another way to achieve similar results without relying on an acoustically trans-
parent front projection screen is to use the phantom center channel capabiliteis
of your surround processor. This requires the listening area to be between the
Left and Right speakers in order for the phantom center image to appear were