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CR-1
Page 10
Frequency Controls
The high-pass and low-pass filters in the CR-1 are designed with a Linkwitz-
Riley alignment. This is true for both the 12 dB/octave and 24 dB/octave slopes.
In keeping with standard Linkwitz-Riley filter practice, the indicated filter
cutoff frequency (aka “corner frequency”) is the -6 dB point, not the -3 dB point.
Electrically, when the CR-1’s high-pass and low pass filters are set at the same
crossover frequency, their outputs will overlap in the crossover region, summing
to a perfectly flat response.
Due to acoustic factors and speaker response deviations, this flat electrical
summation may not actually translate to a flat acoustic summation in your room,
which is why the CR-1 offers independent “Frequency” settings for the high-pass
and low-pass filter sections, as well as a pair of very useful “Damping” controls
(see page 11).
The rotary “Frequency” control knob in the Subwoofer Section of the front
control panel determines the low-pass crossover filter frequency (in Hertz) that is
applied to the subwoofer output signal. The rotary “Frequency” control knob in
the Satellite Section of the front control panel determines the high-pass crossover
filter frequency (in Hertz) applied to the satellite output signal.
CR-1’s ability to “split” the crossover frequencies of the subwoofer and
satellites allows for precision system setup within a given acoustic space and
subwoofer/satellite system.
Sub/Sat Balance Control
The “Sub/Sat Balance” control knob allows easy, intuitive gain
manipulation greatly simplifying level adjustment of your satellites
relative to your subwoofer(s). To increase the relative loudness of
the satellites, simply turn the “Sub/Sat Balance” control clockwise
towards the “+Sat” end of the control markings. To increase the relative
loudness of the subwoofer(s), turn the “Sub/Sat Balance” control knob
counterclockwise towards the “+Sub” end of the control markings.
The “Sub/Sat Balance” Control works over a total range difference of +/-12 dB
(i.e., the Satellites’ output gain can be adjusted to be up to +12 dB higher than the
Subwoofers, or vice versa.) However, to maintain extreme circuit linearity in the
CR-1, when you turn the Level Match Control to +2 dB on the Satellite side (i.e.,
turn up the Satellite level by 2 dB), the circuit actually cuts the Subwoofer output
by 1 dB and raises the Satellite gain by only 1 dB, giving you the desired 2 dB
difference. Operating in this fashion minimizes the gain envelope of the circuitry
and maximizes the sonic transparency of the CR-1.
We recommend that you set up your subwoofer’s gain and your main
loudspeaker amplifier’s gain so that you achieve a good reference subwoofer level
with the “Sub/Sat Balance” control set at “0” (12 O’Clock). This way, you can
always easily return to your reference level setting.
Output Muting Buttons
The “Output Muting” buttons will “Mute” (turn off) the selected satellite or
subwoofer output when the button is pressed “in.” In the muted state, the button will
light up RED. During normal operation the “Output Muting” buttons are unlit.
Output muting can be helpful when troubleshooting or performing measurements
on your sound system. Selectively turning your individual speakers “on” or “off”
will help you isolate individual channels or speakers and determine which units are
functioning properly and which ones may be having problems.
Summary of Contents for CR-1
Page 1: ...Owner s Manual Active Subwoofer Crossover ...
Page 27: ...Page 27 CR 1 ...