Specifications

22
DISTRIBUTION AMPLIFIER/ZONE MIXER/MIC SPLITTER DA-410.
GAIN 5% RESISTORS 1% RESISTORS
10 dB
4,7 KΩ 4,64 KΩ
11 dB
3,9 KΩ 3,92 KΩ
12 dB
3,3 KΩ 3,32 KΩ
13 dB
3 KΩ 2,87 KΩ
14 dB
2,4 KΩ 2,49 KΩ
15 dB
2,2 KΩ 2,21 KΩ
For more accurate results, It is advisable the use of 1% film resistors.
You should be careful with the high gains adjustment (higher than 6 dB), since the
distribution amplifier/zone mixer/mic splitter dynamic decreases considerably.
FILTER FREQUENCY CALCULATION
There are two resistors in the equaliser card labelled RF and RF,' that configure the
centre frequency of the equalisation point. These two resistors should be equal: RF= RF.'
The next table shows the resistors that should use for the thirty frequencies ISO
standard. If you want an intermediate frequency, you are able to calculate an intermediate
value:
FREQUENCY 5% RESISTORS 1% RESISTORS
25 Hz
2 MΩ 1,91 M Ω
31,5 Hz
1,5 MΩ 1,54 M Ω
40 Hz
1,2 MΩ 1,21 M Ω
50 Hz
910 kΩ 953 kΩ
63 Hz
750 kΩ 768 kΩ
80 Hz
620 kΩ 604 kΩ
100 Hz
470 kΩ 487 kΩ
125 Hz
390 kΩ 383 kΩ
160 Hz
300 kΩ 301 kΩ
200 Hz
240 kΩ 243 KΩ
250 Hz
200 kΩ 191 kΩ
315 Hz
150 kΩ 154 kΩ
400 Hz
120 kΩ 121 kΩ
500 Hz
91 kΩ 95,3 kΩ
630 Hz
75 kΩ 76,8 kΩ
800 Hz
62 kΩ 60,4 kΩ
1 kHz
47 kΩ 48,7 kΩ
1,25 kHz
39 kΩ 38,3 kΩ
1,6 kHz
30 kΩ 30,1 kΩ
2 kHz
24 kΩ 24,3 kΩ
2,5 kHz
20 kΩ 19,1 kΩ
3,1 kHz
16 kΩ 15,4 kΩ
4 kHz
12 kΩ 12,1 kΩ
5 kHz
10 kΩ 9,76 kΩ
6,3 kHz
7,5 kΩ 7,68 kΩ
8 kHz
6,2 kΩ 6,04 kΩ