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Community R.5-MAX Operations Instructions Page 15

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R.5-MAX, R2-MAX Page 15 Installation and Operation Manual
In the spirit of our eorts to oer “full-disclosure” specifications and DSP settings, we limited the R-MAX LF boost to no more
than 6 dB. Figures 11 and 12 show a comparison of the R2-64MAX with and without the 6 dB LF EQ boost, and the EQ transfer
function for each.
For the R2-MAX loudspeakers, the dierence in LF extension with and without the LF boost is fairly subtle; the R2 Woofers
and LF horn work very well without equalization to create natural extension and high eciency. The published R2-MAX
equalization curves all contain an optional PEQ filter that adds 6 dB at 90 Hz. (In the Resyn™ Software Loudspeaker Library
for Community’s dSPEC226 processor, this LF boost filter is included, but bypassed by default). In applications that do not
require the full output of the loudspeaker, the designer may choose to include the LF boost. However, this will reduce the
safe, equalized Maximum Output SPL from an R2-MAX by 6 dB. In the case of the R2-64MAX, the Maximum Output SPL
would be reduced from 132dB to 126dB.
‐40
‐30
‐20
‐10
0
10
20
10 100 1000 10000
R2‐64MAXEQTF2
R2-64MAX DSP EQ, +6dB @90Hz BOOST
Frequency (Hz)
100
1000
10000
10
-30
-20
-10
0
10
20
+6dB
-40
Figure 12. R2-64MAX DSP EQ transfer functions with / without +6 dB @ 90 Hz boost
R2-64MAX FREQUENCY RESPONSE, +6dB @90Hz BOOST
Amplitude (dB SPL)
70
80
90
100
110
120
10 100 1000 10000
Amplitude(dBSPL)
Frequency(Hz)
FrequencyResponse(EQ1)
1/6OctaveSmoothing
Frequency (Hz)
1/6 Octave Smoothing
100
1000
10000
10
70
80
90
100
110
120
+6dB
Figure 11. R2-64MAX frequency response graphs with / without +6 dB @ 90 Hz boost
R2-64MAX FREQUENCY RESPONSE, NO LF BOOST
70
80
90
100
110
120
10 100 1000 10000
Amplitude(dBSPL)
Frequency(Hz)
FrequencyResponse(EQ2)
1/6OctaveSmoothing
Frequency (Hz)
1/6 Octave Smoothing
100
1000
10000
10
70
80
90
100
110
120
Amplitude (dB SPL)
R2-64MAX DSP EQ, NO LF BOOST
‐40
‐30
‐20
‐10
0
10
20
10 100 1000 10000
R2‐64MAXEQTF1
Frequency (Hz)
100
1000 10000
10
-30
-20
-10
0
10
20
-40
COMMUNITY'S ALTERNATE APPROACH (continued)
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