Diagramatic View of EQ Dip Switches: Upper Midband Filter Settings
20 way DIP Switch Bank (4+4+2+4+6) | LF EQ |
| Low Mids |
| Hz |
| Up Mid |
| Highs |
5.0: A GUIDE TO SETTING THE EQUALISATION
Assess the monitoring conditions and consider these 4 main factors:
1.The environment: free space (4pi), half space (2pi), quarter space (pi) and in the extreme, a "Difficult Space" (pi/2)
2.The distance from the speakers: far field (2 to 3m), mid field (1 to 2m), near field (0.5 to1m) or close field (less than 0.5m)
3.The room: absorbent or reflective surfaces, estimate the RT 60 decay time above 1kHz
4.The nature of the source material: prolonged sessions working on editing bright or forward material can produce fatigue.
+10dB
0dB re 2.8v
@1 metre
1 1 1 0
1 1 1 0
1 1 1 0
1 1 1 0
0 0 
1 1 0 0
0 0 
0 1 0 0
0 0 0 0 0 0
1 1 1 0 
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1 1 0 
0 0 
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0 0 0
0 0 0 0 0 0
1 1 1 0 |
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1 1 1 0 |
| 1 1 1 0 |
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| 0 0 1 1 |
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
Free Space (4Pi): An example of free space conditions would be with the speakers mounted on tall (0.5m to 1.2m) speaker stands well away from the wall at one end of a room and with the listener 2 to 3 meters away. Under these conditions set all the DIP switches to the 'flat anechoic' position. This then provides a high quality high fidelity installation operating in good acoustically treated environments.
1 1 1 0 | 1 1 1 0 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 |
+10dB |
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0dB re 2.8v |
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10Hz | 20Hz | 50Hz | 100Hz | 200Hz | 500Hz | 1Khz | 2kHz | 5kHz | 10kHz | 20kHz |
Fig. 6. Range of EQ available for DIP switches 11 to 14. All other DIPs set to 'Flat'.
High Frequency Shelf Boost/Cut: a shelving filter between 5kHz and 50kHz can be set to +3dB, +2dB; +1dB, flat anechoic,
Diagramatic View of EQ Dip Switches: High Frequency Filter Settings
20 way DIP Switch Bank (4+4+2+4+6) | LF EQ |
| Low Mids |
| Hz |
| Up Mid |
| Highs |
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| 1 1 1 0 |
| 1 1 1 0 | 0 0 | 0 0 0 0 | 1 1 1 0 0 0 | ||
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| 1 1 1 0 | 1 1 1 0 | 0 0 | 0 0 0 0 | 0 1 1 0 0 0 | |||
+10dB |
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| 1 1 1 0 | 1 1 1 0 |
| 0 0 | 0 0 0 0 | 0 0 1 0 0 0 |
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| 1 1 1 0 | 1 1 1 0 | 0 0 | 0 0 0 0 |
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0dB re 2.8v |
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| 1 1 1 0 | 1 1 1 0 |
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| 1 1 1 0 | 1 1 1 0 | 0 0 | 0 0 0 0 | 0 0 0 1 1 0 | |||
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| 1 1 1 0 | 0 0 | 0 0 0 0 | 0 0 0 1 1 1 | ||
10Hz | 20Hz | 50Hz | 100Hz | 200Hz | 500Hz | 1Khz | 2kHz |
| 5kHz | 10kHz | 20kHz | |
Fig. 7. The range of upper HF EQ controlled by DIP switches 15 to 20. All other DIPs set to 'Flat'
10Hz | 20Hz | 50Hz | 100Hz | 200Hz | 500Hz | 1Khz | 2kHz | 5kHz | 10kHz | 20kHz |
Half Space (2Pi): An example of half space would be with speakers against a wall mounted on stands as above, or on the meter bridge with the console in the centre of a room. Follow the DIP settings in the diagram below for half space (Pi/2) and adjust for the listening distance accordingly. Adjust the
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| 1 1 1 0 | 0 1 1 0 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 |
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+10dB |
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0dB re 2.8v |
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10Hz | 20Hz | 50Hz | 100Hz | 200Hz | 500Hz | 1Khz | 2kHz | 5kHz | 10kHz | 20kHz |
10 | 11 |