ONE SYSTEMS FULL RANGE EQUALIZATION AND FILTER RECOMMENDATIONS (Amended July 18, 2014)
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1 1 ONE SYSTEMS FULL RANGE EQUALIZATION AND FILTER RECOMMENDATIONS (Amended July 18, 2014) One Systems high performance loudspeaker systems are factory-configured for and are nearly always used in passive full range mode. In this configuration, the systems can still benefit from selective parametric or 1/3-octave equalization and high-pass filtering (low-cut). The equalization and filter settings listed below are recommendations based on the far field frequency response data for each model. For most One Systems models, 1/3-octave parametric filters have been recommended. This allows for comparable equalization to be applied to each system when using a conventional (non-parametric) 1/3-octave equalizer with ISO standard frequencies. When bandwidths greater than 1/3 octave are recommended, these bandwidths can be easily approximated by using multiple 1/3-octave filters with appropriate gain settings. In all cases, high pass filters should be used with each model to provide additional low frequency system protection, increased reliability, and additional amplifier headroom. High-pass filters are highly recommended for use with all professional sound reinforcement systems. The recommended high pass filters are 4th order (24 db-per-octave) Butterworth filters but 2nd order (12 db-peroctave) may also be used. In almost all cases the addition of a high pass filter with the appropriate corner frequency will produce audibly superior system performance and enhanced reliability. 103IM PEQ1: Frequency 4 khz Bandwidth: 0.33 octave Gain: -2 db PEQ 2: Frequency 2.5 khz Bandwidth: 0.33 octave Gain: -2 db Low Shelf: 12 db / octave Frequency: 150 Hz Gain: +3 db
2 106IM 2 PEQ1: Frequency 800 Hz Bandwidth: 0.33 octave Gain: -2.0 db PEQ2: Frequency 1,000 Hz Bandwidth: 0.33 octave Gain: -2.0 db PEQ3: Frequency 1,250 Hz Bandwidth: 0.33 octave Gain: -2.0 db Low Shelf: (12 db / octave) Frequency 125 Hz 108CIM PEQ1: Frequency 100 Hz Bandwidth: 0.33 octave Gain: +3.0 db PEQ2: Frequency 125 Hz Bandwidth: 0.33 octave Gain: +3.0 db PEQ3: Frequency 160 Hz Bandwidth: 0.33 octave Gain: +3.0 db PEQ4: Frequency 4,000 Hz Bandwidth: 0.33 octave Gain: -3.0 db 108IM (105 x 60) PEQ2: Frequency 100 Hz Bandwidth: 0.50 octave Gain: +2.0 db 108IM (60 x 40) PEQ1: Frequency 1,600 Hz Bandwidth: 0.33 octave Gain: -2.0 db PEQ2: Frequency 100 Hz Bandwidth: 0.5 octave Gain: +2.0 db 208CIM PEQ1: Frequency 100 Hz Bandwidth: 0.5 octave Gain: +2.5 db 112IM (60 x 40) PEQ1: Frequency 1,000 Hz Bandwidth: 0.5 octave Gain: -2.0 db PEQ2: Frequency 65 Hz Bandwidth: 0.33 octave Gain: +3.0 db
3 112IM (105 x 60) 3 PEQ1: Frequency 1,000 Hz Bandwidth: 0.40 octave Gain: -2.0 db PEQ2: Frequency 65 Hz Bandwidth: 0.33 octave Gain: +3.0 db 115TW (105 x 60) PEQ 2: Frequency 55 Hz Bandwidth: 0.33 octave Gain: +3.0 db 115RW (105 x 60) PEQ 2: Frequency 55 Hz Bandwidth: 0.33 octave Gain: +2.0 db 115TW (60 x 40) PEQ 2: Frequency 55 Hz Bandwidth: 0.33 octave Gain: +3.0 db 115RW (60 x 40) PEQ1: Frequency 600 Hz Bandwidth: 0.50 octave Gain: -2.0 db PEQ 2: Frequency 55 Hz Bandwidth: 0.33 octave Gain: +2.0 db PEQ3: Frequency 2,500 Hz Bandwidth: 0.33 octave Gain: -2.5 db 112UM PEQ1: Frequency 2,500 Hz Bandwidth: 0.33 octave Gain: -2.5 db
4 115UM 4 PEQ1: Frequency 2,500 Hz Bandwidth: 0.33 octave Gain: -2.5 db HPF: Frequency 60 Hz 24 db/octave Butterworth 212CIM PEQ1: Frequency 1,000 Hz Bandwidth: 0.33 octave Gain: -2.5 db PEQ 2: Frequency 70 Hz Bandwidth: 0.33 octave Gain: +2.0 db PEQ3: Frequency 3,000 Hz Bandwidth: 0.33 octave Gain: -2.5 db HPF: Frequency 55 Hz 24 db/octave Butterworth 212IM PEQ1: Frequency 900 Hz Bandwidth: 0.33 octave Gain: -2.5 db 215RW PEQ 2: Frequency 50 Hz Bandwidth: 0.33 octave Gain: +3.0 db 312CIM PEQ1: Frequency 3,000 Hz Bandwidth: 0.33 octave Gain: -2.5 db PEQ 2: Frequency 60 Hz Bandwidth: 0.33 octave Gain: +2.0 db PEQ3: Frequency 11,500 Hz Bandwidth: 0.33 octave Gain: -3.0 db CrossField Array (CFA) PEQ1: Frequency 800 Hz Bandwidth: 0.50 octave Gain: +2.0 db PEQ 2: Frequency 125 Hz Bandwidth: 1.0 octave Gain: +2.0 db PEQ3: Frequency 4,000 Hz Bandwidth: 0.33 octave Gain: -2.0 db
5 CrossField Array-2 (CFA-2) 5 PEQ1: Frequency 125 Hz Bandwidth: 0.50 octave Gain: +3.0 db PEQ2: Frequency 800 Hz Bandwidth: 0.50 octave Gain: +2.0 db PEQ3: Frequency 4,000 Hz Bandwidth: 0.33 octave Gain: -2.0 db HPF: Frequency 80 Hz 24 db/octave Butterworth 118Sub-W PEQ1: Frequency 40 Hz Bandwidth: 0.50 octave Gain: +3.5 db 218Sub-W PEQ1: Frequency 40 Hz Bandwidth: 0.50 octave Gain: +3.5 db 212Sub-W PEQ1: Frequency 50 Hz Bandwidth: 0.50 octave Gain: +3.5 db HPF: Frequency 45 Hz 24 db/octave Butterworth LPF: Frequency Hz 24 db/octave Linkwitz-Riley 112IM-Sub PEQ1: Frequency 65 Hz Bandwidth: 0.50 octave Gain: +3.5 db. Set HPF for associated mid/high enclosure to match LPF frequency of 112IM-Sub
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