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The first method is the preferred method where the highest possible sound quality is
demanded. It has the advantage of ensuring that Strata II receives precisely the
same signal as is being passed to your main speakers. This helps to ensure better
system integration between the two systems (your main speakers and Strata II).
This is a very important point and together with the Strata II’s Active Bass Controller
(ABC), ensures far superior system integration of the sub-bass with the main
system. So far as we are aware, REL are the only sub-bass manufacturer to take
this aspect of performance sufficiently seriously to offer the listener this level of
sophisticated control.
With Dolby AC3 equipment, the most suitable method of connecting up should use
both high and low level inputs together. This method ensures that Strata II receives
both the usual full range signal from the speaker outputs (front left and front right) to
ensure optimum integration with the front system and the sub-bass effects from the
LFE output. If there are two LFE outputs, then both could be used together for a
single Strata II. Alternatively, two Strata II’s could be used for an even greater
dynamic range and bass extension when one should be connected to front left and
rear left and the other to the front right and rear right. The individual LFE outputs
should then be connected to the appropriate Strata II Phono low level input. The
controller (processor) should then be switched to 'full range' on its control options.
SETTING UP AND RUNNING-IN
SETTING UP
Initially, test the action of the controls with the Strata II sited in any convenient
position in your listening room.
Strata II has a phase reversal switch to allow partial cancellation of the frequencies
around the crossover point between the subwoofer and your main system. Listen to
the quality of the bass with the phase switch in position 1 and then in position 2.
Choose the position which subjectively offers the tightest and cleanest bass.
Position 1 is positive phase, i.e. a positive going input signal causes a positive
pressure wave front from Strata II.
Turn the two filter controls fully clockwise (maximum bandwidth). Play some music
with a known bass content, and then adjust the gain control for similar sound levels
from your main system and your sub-woofer. Now reduce both of the filters to the
minimum position. Notice that the level of the bass has almost disappeared. This is
because these very low frequencies are not being boosted by your room. Without
the Active Bass Controller (ABC) you would never be able to hear them properly in
your room. Increase the gain control until this deep bass
is
heard. Slowly increase
the coarse control, one step at a time. If one position appears to be too much,
reduce the control to the lower setting, then increase the fine control, one notch at a
time, until there is a good match between the two systems. It may be necessary,
also, to re-adjust the gain control. With listening experience, it will soon be obvious
which setting sounds best in your room and for your system. One other major
benefit of a REL sub-woofer is that, if you move house or change your system, you
can immediately re-adjust the controls for the best sound again.
It may take several days before you are completely satisfied that you have found the
