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DISTRIBUTION AMPLIFIER/ZONE MIXER/MIC SPLITTER DA-410.

GAIN

5% RESISTORS

1% RESISTORS

10 dB

4,7 K

Ω

4,64 K

Ω

11 dB

3,9 K

Ω

3,92 K

Ω

12 dB

3,3 K

Ω

3,32 K

Ω

13 dB

3 K

Ω

2,87 K

Ω

14 dB

2,4 K

Ω

2,49 K

Ω

15 dB

2,2 K

Ω

2,21 K

Ω

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 M

Ω

1,91 M

Ω

31,5 Hz

1,5 M

Ω

1,54 M

Ω

40 Hz

1,2 M

Ω

1,21 M

Ω

50 Hz

910 k

Ω

953 k

Ω

63 Hz

750 k

Ω

768 k

Ω

80 Hz

620 k

Ω

604 k

Ω

100 Hz

470 k

Ω

487 k

Ω

125 Hz

390 k

Ω

383 k

Ω

160 Hz

300 k

Ω

301 k

Ω

200 Hz

240 k

Ω

243 K

Ω

250 Hz

200 k

Ω

191 k

Ω

315 Hz

150 k

Ω

154 k

Ω

400 Hz

120 k

Ω

121 k

Ω

500 Hz

91 k

Ω

95,3 k

Ω

630 Hz

75 k

Ω

76,8 k

Ω

800 Hz

62 k

Ω

60,4 k

Ω

1 kHz

47 k

Ω

48,7 k

Ω

1,25 kHz

39 k

Ω

38,3 k

Ω

1,6 kHz

30 k

Ω

30,1 k

Ω

2 kHz

24 k

Ω

24,3 k

Ω

2,5 kHz

20 k

Ω

19,1 k

Ω

3,1 kHz

16 k

Ω

15,4 k

Ω

4 kHz

12 k

Ω

12,1 k

Ω

5 kHz

10 k

Ω

9,76 k

Ω

6,3 kHz

7,5 k

Ω

7,68 k

Ω

8 kHz

6,2 k

Ω

6,04 k

Ω

Содержание DA-410

Страница 1: ...ION AMPLIFIER ZONE MIXER MIC SPLITTER OWNERS MANUAL EQUIPOS EUROPEOS ELECTR NICOS S A L Avda de la Industria 50 28760 TRES CANTOS MADRID SPAIN 34 1 804 32 65 34 1 804 43 58 altair altairaudio com www...

Страница 2: ...IGNAL VU METER 15 MONITOR LEVEL CONTROL 15 HEADPHONES OUTPUT 15 MINIATURE SPEAKERS 15 MIC LINE INPUT SIGNAL SELECTOR 15 OPERATING LEVEL CHART 16 6 OPTIONS 16 INPUT TRANSFORMER IT DA 16 OUTPUT TRANSFOR...

Страница 3: ...without quality and headroom degradation Up to 4x8 or 1x10 active splitting is possible One MONO switch by Zone allows to convert the output signals in order to adapt them to monophonic equipment If t...

Страница 4: ...distribution amplifier zone mixer mic splitter The description and explanation of each one of them you will find in the corresponding section FRONT PANEL MINIATURE SPEAKERS MONITOR SIGNAL VU METER SIG...

Страница 5: ...AMPLIFIER ZONE MIXER MIC SPLITTER DA 410 REAR PANEL MAINS CONNECTOR AND FUSE HOLDER VOLTAGE SELECTOR EARTH LINK SWITCH OUTPUT SIGNAL CONNECTOR XLR 3 32 INPUT SIGNAL CONNECTOR XLR 3 31 MIC LINE INPUT S...

Страница 6: ...nnect it from the mains and consult a qualified service technician Don t place the unit close to heat sources 4 INSTALLATION UNPACKING Before leaving from factory each distribution amplifier was caref...

Страница 7: ...ate at 230V 50 60Hz or at 115V 50 60Hz Make sure that the unit is disconnected from the mains In the unit rear panel is placed the mains connector and the fuse holder The box bellow this mains connect...

Страница 8: ...reo channel The input connections are balanced with a nominal impedance of 5 k 2 5k unbalanced with the input set up in line mode and 2 k 1k unbalanced with the input set up in mic mode The next list...

Страница 9: ...SPLITTER DA 410 UNBALANCED INPUT This type of connection will be used when the sound source doesn t provide balanced output When possible employ the connection type 1 1 Using twin lead shielded cable...

Страница 10: ...input signal balanced or unbalanced and the second the ground configuration of the sound destination unit floating or ground referenced The next pictures shows some of the different possibilities of c...

Страница 11: ...TER DA 410 UNBALANCED OUTPUT This type of connection will be used when the sound destination unit doesn t provide a balanced input When possible employ the connection type 1 1 Using twin lead shielded...

Страница 12: ...TH THE DISTRIBUION AMPLIFIER ZONE MIXER MIC SPLITTER ELECTRIC GROUND MAINS EARTH LIFTED FROM THE DISTRIBUION AMPLIFIER ZONE MIXER MIC SPLITTER ELECTRIC GROUND NOTE For security reasons the earth conne...

Страница 13: ...rotects the output signal from switch on transients This delay takes two seconds and in the meantime the unit remains in mute SIGNAL AND OVERLOAD INPUT INDICATOR The distribution amplifier zone mixer...

Страница 14: ...stereo signals to monophonic equipment and equally duplicate the monophonic input signals for stereo equipments NOTE If the input signal is monophonic it s say the input signal only are connected to...

Страница 15: ...he headphones output automatically the miniature speakers are disconnected MINIATURE SPEAKERS The monitor listening of the selected signal drives a pair of stereo miniature speakers placed at the fron...

Страница 16: ...3 dBu 18 dB 0 dB 3 dBu 18 dB MIC 6 dB 6 dB 3 dBu 24 dB 0 dB 22 dBu 0 dB 0 dB 6 dB 16 dBu 6 dB 0 dB 16 dBu 6 dB LINE 6 dB 6 dB 10 dBu 12 dB 6 OPTIONS In this section will explain the different availab...

Страница 17: ...t bars allowing the installation as a stand alone unit This cover prevents also from unauthorised extraction of the unit when rack mounted 7 SPECIAL OPERATIONS In order to set up some of the distribut...

Страница 18: ...18 DISTRIBUTION AMPLIFIER ZONE MIXER MIC SPLITTER DA 410...

Страница 19: ...hart In the following picture is shown the placement of the input transformer TR1 corresponding to the IN AL input It is important to keep in mind the placement of the input transformer pins so that t...

Страница 20: ...r In this case LK9 and LK10 Place the output transformer keeping in mind the position of their pins seven to the top and six to the bottom and solder it to the main board EQUALISER CARD Two equaliser...

Страница 21: ...er inserted in the signal path and the results are verified with a spectrum analyser Then translate the obtained parameters to the next tables A theoretical approximation can also be used from the lou...

Страница 22: ...qualisation 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 abl...

Страница 23: ...andwidth So that the Q is the filter centre frequency divided by the difference of the higher and lower frequency which the amplitude response is three dB down from the filter centre frequency The nex...

Страница 24: ...SISTORS 71 5K 73 2K 75K 76 8K 78 7K Q 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8 9 9 5 RESISTORS 82K 1 RESISTORS 80 6K 82 5K 84 5K 86 6K 88 7K Q 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 8 9 9 10 5 RESISTORS 91K 100K 1 RE...

Страница 25: ...allows The right picture shows a notch filter type with 15 dB of attenuation at 1 kHz PLACING AN EQUALIZER CARD Before placing the equaliser card you should adjust it for this it is recommended that...

Страница 26: ...eak LIFTING THE XLR INPUT GROUNDS When carried out a connection of balanced input with a ground referenced sound source refer the section INPUT CONNECTION for more information it is necessary to lift...

Страница 27: ...27 DISTRIBUTION AMPLIFIER ZONE MIXER MIC SPLITTER DA 410...

Страница 28: ...ed the monitor signal it crosses a level control and a 10 dB amplifier driving the speakers we could see in the block diagram that when we introduce a headphones jack the signal in the speakers is mut...

Страница 29: ...because some delicate parts as the LED lamps must be introduced in small panel holes and it is a not easy operation Normally the signal reductions in the distribution amplifier zone mixer mic splitter...

Страница 30: ...ette desk or a CD both working in stereo mode With the DA 410 outputs will feed the amplifiers of the different zones controlling the signal level to each zone and enabling to choose one of the two st...

Страница 31: ...phantom powering to the microphones requiring it The other output of the stage box both are paralleled is connected to the DA 410 inputs In this configuration the inputs are configured in MIC mode op...

Страница 32: ...Less than 100 dBu at any output 20 Hz to 20 kHz unweighted E I N 111 dBu Mic inputs 200 source impedance FREQUENCY RESPONSE 10 Hz to 50 kHz 0 0 5 dB CHANNEL SEPARATION Greater than 90 dB 1kHz 67 dB 2...

Страница 33: ...re not covered by this warranty There is no other warranty expressed or implicit Any faulty unit must be sent to the dealer or the manufacturer The serial number of the unit must be included with any...

Страница 34: ...de la Directiva RAEE se refiere a los programas y procedimientos espec ficos de reciclaje para aparatos electr nicos de pa ses de la Uni n Europea Recomendamos el reciclaje de nuestros productos Si t...

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