Table 7: Recommended High-Pass Filters - Community iBOX SERIES Installation & Operation Manual

Impedance
iBOX full-range and single-woofer loudspeakers are rated at 8-ohms nominal impedance. Dual-woofer models
are rated at 4-ohms nominal impedance except the i2W8 which is 8-ohms. The i2W8T impedance depends on 70V or
100V tap selected.
Recommended Amplifier Power
See Table 9 on Page 30 for recommended amplifier power for each specific model. Using an amplifier of less
power than recommended will not allow maximum performance of the system and can damage the loudspeaker if the
amplifier is driven into clipping. Correspondingly, using an amplifier of more power than recommended can result in
overdriving the loudspeaker with the potential for damaging the drivers and/or the protection circuitry.
Use of Limiters
Community recommends use of a limiter to help prevent loudspeaker damage due to sudden transients
(dropped microphones, etc.) and to prevent amplifier clipping. When used for this purpose, connect the limiter as the
last item in the signal chain before the power amplifier (at the input to the power amplifier). Set the limiter's "threshold"
high enough so that no limiting occurs until the signal is in danger of clipping. Set the limiter's "compression ratio" to a
high enough ratio to prevent clipping. For professional audio equipment, a typical threshold setting would be +10 dBu
and a typical compression ratio setting would be 10:1 or higher.
Connecting Multiple Loudspeakers to a Single Amplifier
The best way to connect multiple loudspeakers to a single power amplifier is to design a 70-volt or 100-volt
distributed system. However, it is acceptable to connect as many as four 8-ohm loudspeakers in parallel and connect
this combination to a single amplifier channel provided that amplifier is rated for the resulting 2-ohm impedance load.
Table 7: Recommended High-Pass Filter Settings
Model
iHP1200 Series Full-Range:
iHP1500 Series Full-Range:
iHP3500 Series Full-Range:
i2W8 and i2W8T
M12 Stage Monitor:
i-112S Subwoofer:
i-115S Subwoofer:
i-118S Subwoofer:
i-212S Subwoofer:
i-215LVS Subwoofer:
i-215S Subwoofer:
iLF218 Subwoofer:
Community iBOX Installation/Operation Manual — Page 28
INSTALLATION
High-Pass Filter
60 Hz, 24dB/octave
60 Hz, 24dB/octave
50 Hz, 24dB/octave
65 Hz, 24dB/octave
60 Hz, 24dB/octave
30 Hz, 24dB/octave
30 Hz, 24dB/octave
30 Hz, 24dB/octave
35 Hz, 24dB/octave
35 Hz, 24dB/octave
35 Hz, 24dB/octave
25 Hz, 24dB/octave