Specifications

24
DISTRIBUTION AMPLIFIER/ZONE MIXER/MIC SPLITTER DA-410.
Q 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1
5% RESISTORS
1 KΩ 2KΩ 3KΩ 3,9KΩ 5,1KΩ 6,2KΩ 6,8KΩ 8,2KΩ 9,1KΩ 10KΩ
1% RESISTORS
1KΩ 2KΩ 3,01KΩ 4,02KΩ 4,99KΩ 6,04KΩ 6,98KΩ 8,06KΩ 9,09KΩ 10KΩ
Q 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2
5% RESISTORS
11KΩ 12KΩ 13KΩ
--
15KΩ 16KΩ
--
18KΩ
--
20KΩ
1% RESISTORS
11,0KΩ 12,1KΩ 13,0KΩ 14,0KΩ 15,0KΩ 16,2KΩ 16,9KΩ 18,2KΩ 19,1KΩ 20,0KΩ
Q 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3
5% RESISTORS
--
22KΩ
--
24KΩ
-- --
27KΩ
-- --
30KΩ
1% RESISTORS
21,0KΩ 22,1KΩ 23,2KΩ 24,3KΩ 24,9KΩ 26,1KΩ 26,7KΩ 28,0KΩ 28,7KΩ 30,1KΩ
Q 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4
5% RESISTORS
-- --
33KΩ
-- --
36KΩ
-- --
39KΩ
--
1% RESISTORS
30,9KΩ 32,4KΩ 33,2KΩ 34,0KΩ 34,8KΩ 35,7KΩ 37,4KΩ 38,3KΩ 39,2KΩ 40,2KΩ
Q 4,1 4,2 4,3 4,4 4,5 4,6 4,7 4,8 4,9 5
5% RESISTORS
-- --
43KΩ
-- -- --
47KΩ
-- -- --
1% RESISTORS
41,2KΩ 42,2KΩ 43,2KΩ 44,2KΩ 45,3KΩ 46,4KΩ
--
47,5KΩ 48,7KΩ 49,9KΩ
Q 5,1 5,2 5,3 5,4 5,5 5,6 5,7 5,8 5,9 6
5% RESISTORS
51KΩ
-- -- -- --
56KΩ
-- -- -- --
1% RESISTORS
51,1KΩ 52,3KΩ
--
53,6KΩ 54,9KΩ 56,2KΩ
--
57,6KΩ 59,0KΩ 60,4KΩ
Q 6,1 6,2 6,3 6,4 6,5 6,6 6,7 6,8 6,9 7
5% RESISTORS
--
62KΩ
-- -- -- -- --
68KΩ
-- --
1% RESISTORS
--
61,9KΩ 63,4KΩ
--
64,9KΩ
--
66,5KΩ 68,1KΩ
--
69,8KΩ
Q 7,1 7,2 7,3 7,4 7,5 7,6 7,7 7,8 7,9 8
5% RESISTORS
-- -- -- --
75KΩ
-- -- -- -- --
1% RESISTORS
71,5KΩ
--
73,2KΩ
--
75KΩ
--
76,8KΩ
--
78,7KΩ
--
Q 8,1 8,2 8,3 8,4 8,5 8,6 8,7 8,8 8,9 9
5% RESISTORS
--
82KΩ
-- -- -- -- -- -- -- --
1% RESISTORS
80,6KΩ
--
82,5KΩ
--
84,5KΩ
--
86,6KΩ
--
88,7KΩ
--
Q 9,1 9,2 9,3 9,4 9,5 9,6 9,7 9,8 9,9 10
5% RESISTORS
91KΩ
-- -- -- -- -- -- --
--
100KΩ
1% RESISTORS
91,0KΩ
--
93,1KΩ
--
95,3KΩ
-- --
97,6KΩ
--
100KΩ
As seen in the table, there are Q values for which don't exist available commercial
resistors. In that case you should approach to the nearest Q.
As in the others cases, for more accurate results, it is always advisable that use 1%
resistors.
GAIN VARIATION
Apart from the gain, frequency and Q variations, you could vary the total output gain in
which it is insert the equalisation point. This one could carry out varying the R1 resistor of the
equaliser card.
The formula that gives us the gain is showed in the picture, the gain
in dB and the resistor in Ω. The factory value for R1 is 10 kΩ, giving a gain of
0 dB. For example, for a gain of 6 dB, the resistor R1 would be of 5.1 kΩ 5%
or 4.99 kΩ 1%, and for a gain of - 6 dB, the resistor R1 would be 20 kΩ 5%
or 20 kΩ 1%. You should use values lower than 2 kΩ for this resistor.
You should be careful in the adjustment of high gains (great of 6 dB), since the
distribution amplifier/zone mixer/mic splitter dynamic diminishes considerably.
The next table shows the value of R1 resistor for different gains: