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REL Acoustics Britannia Range User Manual
23
REL Set-Up Made Simpler
Connecting
High-level connection, using the enclosed cable, is always the first choice. The
standard high level hook up procedure is: attach the red wire to the amplifier’s right
positive speaker output terminal; attach the yellow wire to the amplifier’s left positive
speaker output terminal; attach the black wire to which ever of the amplifier’s ground
output terminals is convenient; plug the connector into the “HIGH LEVEL
UNBALANCED INPUT” input. For connection to a differential amplifier consult your
dealer.
Positioning
Primary Placement, for a REL is in one of the corners behind the main speakers.
Phase Selection is the next step. Keep in mind; the correct phase is whichever position is the
loudest or fullest. While playing music with true low bass, adjust the crossover to a point
where the sub and the speaker are sure to share frequencies (B, 3 for big speakers; C, 4 for
smaller speakers). At this point adjust the gain so that both sub and speaker are roughly
equal in output and then switch, using the “mode selector” switch, from “0” (position 1) to
“180” (position 3) phase positions. Again, whichever position is loudest or fullest is the correct
position, and, as often as not, may be 180-degree phase (see enclosed “Control Panel”
section from the owner’s manual).
Position. The next step is to determine precisely how far out from the corner the sub should
be to achieve the most efficient output, as well as the lowest frequency extension. With the
sub fully into the corner, continuing to play the music, slowly pull the sub from the corner on
the diagonal, equidistant from both side and rear wall. At a certain point (sometimes a matter
of only a few inches, in rare cases a foot or more) the sub will audibly go lower, play louder,
and, if it truly locks on to the room and is fully pressurising it, the air around the sub will seem
to be energised. Stop right there! This is the correct position for the sub.
Orientation. Once the position from the corner has been established, the orientation of the
woofer must be determined by rotating the REL from an imagined centre point at the rear of
the sub. As the sub is moved from one side to the other listen for the greatest level of output
and bass linearity. In effect, the sub should left in the position where it is playing the loudest
and lowest.
Adjusting
Crossover Selection. To determine the crossover point, bring the gain down, put the
crossover to A-1 (or B-2 should output not be sufficient), and then bring the gain back up to
the point where you have achieved a subtle balance. Working only with the coarse control (A-
D), bring the crossover point up until it is obviously too high, at this point bring it down to the
next lowest setting. Now, working with the fine control (1-6), bring up the crossover point until
it sounds too high, at which point bring it back down to the next lowest setting. For all intents
and purposes, this is the correct crossover point. Once this stage has been reached, subtle
changes to gain and crossover can be accomplished to provide the last bit of complete and
seamless integration. In addition, subtle adjustments of the orientation of the sub may provide
further improvement of the sub-bass system’s integration with the main speakers.
Including Theatre
Multi-channel systems LFE output should be connected to the low-level input and appropriate
gain adjustments made at this point. It may be necessary to take the crossover out of the low-
level input using the “mode” switch if extra upper bass output is called for. Keep phase
consistent with what was selected during high-level set-up by simply choosing the
corresponding setting (1 = 2, 3 = 4). When connecting to the low level inputs, connect a single
RCA cable to the 0dB RCA jack. Should additional gain be required, connect to the +12 dB
input.
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