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7. CONTROL ROOM and MONO SECTION

1. SOURCE SELECTOR SWITCH

The control room monitors and the studio playback monitors are both
controlled from this console. A bank of switches selects the stereo
sources available to the speakers from L/R MIX , MIX-B, 2-TRACK
and EXTERNAL. You can select any combination of signal source.

2.

CONTROL ROOM CONTROL

This is a stereo level control for the studio monitor.
This circuit monitors the left/right SOLO buses.

3.

MONO FADER

This 100-mm faders adjust the final level of the combined signals
from solo buses, and send them to the MONO output jacks .

Rated output (Nominal) level is achieved with the fader set at

“

0

”

on the scale.

8 BUS MIXING CONSOLE

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Summary of Contents for D2250

Page 1: ...Live Mix Pro 40 8 ORDERCODE D2250 ...

Page 2: ... for service Never place the unit near radiators in front of heating vents to direct sun light in excessive humid or dusty location to avoid early damage and for your years of quality entertainment Connect your complementary compoments as illustrated in the following page CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SER...

Page 3: ...S 8 Group mixing buses each with its own Master Fader ON OFF Switch to Stereo Mix Buses 7 TAPE INPUT You can connect the outputs of your multi track recorder 8 INPUT CH INSERT I O JACK and DIRECT OUT JACK INPUT CH INSTER I O jack and DIRECT OUT jack are provided on each channel allowing you to connect effect devices independently for each channel 9 MASTER INSTER I O INSTER I O connector are provid...

Page 4: ...ulation or vibration which could cause mechanical damage 2 AVOID PHYSICAL SHOCKS Strong physical shocks to the unit can cause damage Handle it with care 3 D0 NOT OPEN THE CASE OR ATTEMPT REPAIRS OR MODIFICATIONS YOURSELF This product contains no user serviceable parts Refer all maintenance to qualified service personnel Opening the case and or tampering with internal circuitry voids the warranty 4...

Page 5: ... occasionally 4 MIC LINE INPUT SELECTOR This switch selects the input connector for the channel When MIC LINE is selected the input signal will be taken Mic connector Balanced XLR type When TAPE is selected the input signal will be taken LINE connector Balanced phone jack 5 MIC LINE OR TAPE INPUT SELECTOR FLIP SWITCH This switch selects the input connector for the channel When MIC LINE is selected...

Page 6: ...ffected by the channel fader setting The AUX 5 AUX 7 and AUX 6 AUX 8 controls will be affected by the POST PRE SELECT SWITCH and SHIFT 7 8 SIGNAL SELECT SWITCH setting 9 AUX 5 8 POST PRE SELECT SWITCH POST RELEASAED SWITCH Selects the post fader signal from the point in the channel after the MUTE OFF switch Because the signal feeding this position will be subject to any adjustments to that channel...

Page 7: ...is allows either the mic line input or tape return inputs to be routed through either the channel fader path or MIX B with separate EQ and monitoring The SPLIT switch in the MIX B section sprits the EQ section of the channel when depressed In the up position all four sections of EQ remain if engaged in the primary channel signal path feeding the channel fader and the 8 plus 2 buses In this mode th...

Page 8: ...p 2 4 6 8 buses 16 CHANNE MUTE SWITCH When this switch is off the signal of each channel will be the MAIN MIX L R buses the Group 1 8 buses and AUX 1 8 buses When this switch is on the output signal to each bus muted completely This switch should be turned on for unused channels The channel s mute switch does not affect the channel s insert output or direct output 17 BUS ASSIGH SWITCH When these s...

Page 9: ...t J75 PRE J87 PRE 3 Add a jumper at J80 POST J83 POST 4 Repeat for of all input channels MIX B modification This modifiction changes the option point of the MIX B from pre EQ to post EQ It must be done on each channel For example if you have a 24 channel modifiction must be done on all 24 input channel See below figure 1 Remove power cable 2 Remove jumper at J89 PRE 3 Add a jumper at J90 POST 4 Re...

Page 10: ...fader and the signal levels sent to the AUX 1 2 buses will be unaffected by the channel fader setting The AUX 3 4 controls on the STEREO 2 4 PANEL are post fader and the signal levels sent to the AUX 3 4 buses will beaffected by the channel fader setting 5 BALANCE CONTROL This control adjusts the balance or the L R position of the stereo input signal Turning the BALANCE control to left of center m...

Page 11: ...gns the output of the channel PAN control to the stereo solo buses 10 CHANNEL FADER This fader controls the output level of the input channel signal determining the volume balance between channels The channel fader should be lowered for unused channels PAD SWITCH STEREO INPUT SENSITIVITY SELECT If you select STEREO INPUT SENSITIVITY to either 10dB or 4dB Look at the STEREO INPUT PC Board The PAD S...

Page 12: ...7 GR 8 ST L ST R HA R HA HIGH LOW L MDNO GR 1 GR 2 GR 4 GR 3 GR 5 GR 6 GR 7 ST L ST R GR 8 LEVEL LEVEL PEAK SIGNAL MUTE BALANCE HA STEREO INPUT 10dB 4dB HA HIGH LOW L MONO R CH2 4 CH1 3 10dB LEVEL BALANCE MUTE GROUP 3 MIX L STERCO INPUT 10dB 4dB 4dB 10dB 4dB 10dB 4dB 10dB 4dB SOLO POST AUX CH2 4 POST AUX CH2 4 PRE AUX1 CH1 3 TONE SOLO TONE PRE AUX1 CH1 3 B B PAD PAD PEAK SIGNAL ...

Page 13: ...es 3 BALANCE CONTROL This control directs the signal coming from the AUX RETURN level control into the left and or right channels Turning the BALANCE control to the left of center moves the apparent source toward the left channel Turning it to the right moves the source toward the right channel Centering the control makes the apparent source appear to be centered between the channels 4 LEVEL CONTR...

Page 14: ...the signal from each respective AUX SEND will be muted to the corresponding AUX sent connector 2 SOLO SWTCH when you wish to monitor the output signals being sent to AUX SEND 1 6 press the appropriate switch 3 LEVEL CONTROL The AUX SEND master adjusts the overall mix level on each res pective AUX buses The signal sent is the summed total of the indivi dual sends on each input channel routed to a p...

Page 15: ...ses 2 MUTE SWITCH When this switch is on the signal of each Group will not be sent to the Group connectors 3 SOLO SWITCH Pressing this switch will allow you to monitor the output signals being sent to Group 1 8 press the appropriate switch 4 PAN CONTROL This control adjusts the panning of the GROUP signal sent to the STEREO MIX L R buses 5 LEVEL CONTROL This fader adjust the final level of the com...

Page 16: ...ined signals from all channels and send them to the MIX B output jacks 3 STUDIO OUT CONTROL This is a stereo level control for the studio This circuit monitors the left right SOLO buses 4 MIX L R MUTE SWITCH When this switch is off the signal of MIX L R will be sent to the MIX L R connectors When this switch is on the MIX L R output signal to MIX L R connectors will be muted 5 MIX L R MASTER FADER...

Page 17: ... R MIX MIX B 2 TRACK and EXTERNAL You can select any combination of signal source 2 CONTROL ROOM CONTROL This is a stereo level control for the studio monitor This circuit monitors the left right SOLO buses 3 MONO FADER This 100 mm faders adjust the final level of the combined signals from solo buses and send them to the MONO output jacks Rated output Nominal level is achieved with the fader set a...

Page 18: ...B R 4dB HEADPHONES 100mW TIP LEFT RING RIGHT STUDIO OUTPUT L 4dB STUDIO OUTPUT R 4dB CONTROL ROOM OUTPUT R 4dB CONTROL ROOM OUTPUT L 4dB GROUP 1 GROUP 2 GROUP 3 GROUP 4 MIX L MIX R AUX 1 AUX 2 AUX 3 AUX 5 AUX 4 AUX 7 AUX 6 PFL CTRL SOLO L SOLO R MIX B L MIX B R AUX 8 EXTERNAL 2 TRACK MIX B MAIN MIX AUX 5 AUX 7 AUX 5 6 GROUP 5 GROUP 6 GROUP 7 GROUP 8 8 BUS MIXING CONSOLE 17 ...

Page 19: ...ge them if a different signal routing is required 3 ON OFF SWITCH When this switch is on the signal of the TALKBACK will be sent to AUX 1 8 GROUP 1 8 and the MIX L R buses 4 LEVEL CONTROL This control adjusts the signal level of the TALKBACK input 5 HEADPHONES OUTPUT JACK 1 4 TRS STEREO JACK These jacks tip left ring right sleeve GND may be connected to external power amplifiers for headphone dist...

Page 20: ...N control sets the level at the HEADPHONE jack 7 HEADPHONE MONITOR SELETOR This contains a stereo level control for the headphones outputs a stereo SOLO switch six push buttons to select from the following signal source MONITOR MIX B AUX SENDS 3 4 AUX SENDS 5 6 AUX SENDS 7 8 and EXTERNAL You can select any combination of source The AUX SENDS 3 4 5 6 and AUX SENDS 7 8 switches are connected directl...

Page 21: ...s the continuous output level of MONITIOR or MONO Each indicator is calibrated in volume units such that 0dB corresponds to an output of 1 23 volts which is 4dBu a standard in the industry 3 METER SELECT SWITCH This switch selects whether MONITIOR or MONO will be monitored MONITOR RELEASED SWITCH mode the LED meter displays the output levels of the CONTROL ROOM output jacks MONO DEPRESSED SWITCH m...

Page 22: ...is switch turns the power ON OFF and the power indicator will light in the ON position the power indicator will light 10 METER BRIDGE 1 CHANNEL NPUT LEVEL INDICATOR A vertical row of ten light emitting diodes shows the continuous output level of input channel For optimum signal to noise ratio try to adjust all settings so that program material is usually at or around 0 VU with occasional but not s...

Page 23: ... pins 2 and 3 of these connectors It is important that during operation or testing of the mixer all channel faders remain fully down whenever the MIC input is not properly terminated with a microphone or equivalent 150 ohm source An open MIC invites the introduction of high noise levels which could produce lower quality sound or an incorrect test measurement 2 1 3 PHASE Normal 1 GND 2 3 PHASE Reve...

Page 24: ...ls including the variable GAIN control affect the LINE input Maximum input level before preamp clipping is 12V or 24dB 4 INPUT CHANNEL INSERT These are input output jacks located between the head amplifier and the high pass filter The nominal input level and impedance is 0dB 600Ω and the nominal output level and impedance is 0dB 10kΩ These jacks allow you to own graphic equalizers compressors nois...

Page 25: ...ese allow you to return signal from outboard devices either in stereo pairs or mono phonically many popular effects processors provide a single mono input but have a pair of stereo outputs In practice you ll probably want to use the Auxiliary returns to bring in signal from connected effects processors If the effects processors have stereo output they should be connected to both the left and right...

Page 26: ... patch point before the GROUP MASTER FADER The INSTER IN line accepts a 0dB 600Ω signal and the INSTER OUT line delivers a 0dB signal capable of driving a 10k ohm load impedance The GROUP INSTER inputs are convenient way of patching in a device such as a compressor limiter for use on an entire group of instruments 6 CTRL ROOM CONNECTOR These are unbalanced 1 4 phone jack with a nominal output and ...

Page 27: ...r amplifiers and or the processing gear These XLR type outputs have a rated level of 4dB and impedance of 600 ohms 12 MONO OUTPUT CONNECTOR These XLR type outputs have a rated level of 4dB and impedance of 600 ohms The MONO OUT can be used for simple recording of a live performance for driving a sub power amplifier or to check for phase cancellation 13 TAPE RETURN INPUT CONNECTOR The connections t...

Page 28: ...ut this method is unsuitable for audio installations The preferred method is to run an individual earth wire from each outlet back to the system star point to provide a safety earth screen reference for each of equipment A separate earth wire should also be run from each equipment rack and area to the star point This may or may not be used depending on circumstances but it is easier to install in ...

Page 29: ...he console and the monitor system should you proceed with the next step Connect the multi track tape recorder via the noise reduction system if in use and again check that the system is clean Connect stereo tape records studio monitors aux sends one at a time checking and isolating any connection which degrades performance Connect all other peripheral devices Connect all microphone lines By follow...

Page 30: ... for instability at the output Always connect both conductors at both ends and ensure that the screen is only connected at once end Do not disconnect the mains earth from each piece of equipment This is needed to provided both safety and screen returns to the system star point Equipment which has balanced inputs and outputs may need to be electrically isolated from the equipment rack and or other ...

Page 31: ... Ground Sleeve Ring Tip Signal Ground Insert Points Line Input Headphones Unbalanced Input Output AUX send 2 Pole Mono Jack 3 Pole Stereo Jack Audio Connectors Two different types of audio connectors are used 3 pin XLR and 1 4 there pole A gauge jacks These are used in several configurations as shown below Sleeve Ring Tip 8 BUS MIXING CONSOLE 30 Ring ...

Page 32: ...se of leakage currents from equipment in the audio system and in the house some noise currents can ride on the AC ground wire and are able to enter the audio system This problem is usually most noticeable with sensitive equipment such as the mixer Lifting the AC ground at the mixer can often solve this problem However lifting the AC ground on the mixer also lifts the AC ground on the microphone ch...

Page 33: ...e in and line out microphones Unbalanced low impedance some professional equipment microphones C STANDARD PHONE Unbalanced high impedance most hi fi equipment E STANDARD PHONE Unbalanced high impedance most hi fi equipment D STANDARD PHONE REMOTE DEVICE DESCRIPTION CABLE REMOTE SIDE OF CABLE Connector type CONNECTOR AND CABLE CONFIGURATIONS Connector and cable configurations recommended for use wi...

Page 34: ...each channel to PRE and patch the AUX send outputs to the appropriate amplifiers If you need to provide a simultaneous mix for a stereo recording use the MIX B buses FOLLOW THIS SENSITIVITY ADJUSTMENT PROCEDURE FOR EACH CHANNEL IN USE 1 Assign signal to channel fader LIf channel will be used with a microphone MIC LINE switch should be up MIC LINE TAPE switch should be up LIf channel will be used w...

Page 35: ...gnal to channel fader LIf channel will be used with a microphone MIC LINE switch should be up MIX LINE TAPE switch should be up LIf channel will be used with line input MIC LINE switch should be down MIC LINE TAPE switch should be up LIf channel will be used with a tape input MIC LINE or TAPE switch should be down 2 set channel strip controls as follows LTRIM pot all the way counterclockwise LAUX ...

Page 36: ...b 2 Any Line Level Input Keyboard other line level input Stereo Compressor Noise Gate Mono Compressor OUT IN OUT IN OUT IN OUT OUT IN OUT OUT OUT IN IN Vocal Microphones OUT IN Some as AUX Send 6 PA SOUND REINFORCEMENT CONNCTION POWER SUPPLY Vocal Microphones Keyboard other line level input Studio monitors Studio monitors Amplifier Digital Delay OUT Applications 1 IN 8 BUS MIXING CONSOLE 35 ...

Page 37: ...Room Monitor Tape Deck Tape Deck Tape Deck Vocal Microphones Vocal Microphones Guitar Effects Box Any Line Level Input Vocal Microphones Reverb 1 Out In OVER DUBBING CONNECTION OUT OUT OUT IN IN IN Applications 2 Mono Compressor OUT IN 8 BUS MIXING CONSOLE 36 1 2 3 ...

Page 38: ...no compressor OUT IN Noise Gate IN OUT IN OUT Amplifier Digital Delay Reverb OUT IN OUT IN IN OUT IN IN IN IN OUT Digital Delay Processor Stereo compressor DAT or Cassette Deck Vocal Microphones OUT OUT Tape Deck Tape Deck Tape Deck Control Room Monitor MULTI TRACK MIXING CONNECTION Applications 3 8 BUS MIXING CONSOLE 37 1 2 3 ...

Page 39: ...ROUP 7 GROUP 6 GROUP 8 GROUP 1 GROUP 3 GROUP 2 GROUP 4 LA SA LA SA SA SA EXTERNAL 2 TRACK MIX B MAIN MIX SOLO CONTROL LED METER MONITOR R LED METER MONITOR L EXTERNAL AUX 5 AUX 6 AUX 7 AUX 8 MONITOR MIX B AUX 7 8 AUX 5 6 LEVEL TO MIX LEVEL MIX B L 4dB MIX B L OUT MIX B R OUT MIX B R 4dB HEADPHONES 100mW TIP LEFT RING RIGHT STUDIO OUTPUT L 4dB STUDIO OUTPUT R 4dB CTRL ROOM OUTPUT R 4dB CTRL ROOM OU...

Page 40: ...OUT 600Ω 84dB MIC IN to MIX L R GROUP OUT 1 8 76dB MIC IN to AUX SEND 1 4 AUX SEND 5 8 PRE 86dB MIC IN to AUX SEND 5 8 POST 90dB MIC IN to STUDIO OUT CTRL ROOM OUT 84dB MIC IN to MONO OUT 44dB LINE IN to MIX L R GROUP OUT 1 8 36dB LINE IN to AUX SEND 1 4 AUX SEND 5 8 PRE 46dB LINE IN to AUX SEND 5 8 POST 50dB LINE IN toSTUDIO OUT CTRL ROOM OUT 44dB LINE IN to MONO OUT 34dB ST IN to MIX L R GROUP O...

Page 41: ...al Level Nominal Impedance Connector Type 4kΩ OUTPUT Output Impedance Output Connector Group Out 1 8 Input Nominal Level 150Ω Nominal Impedance Output Connector MIX Out L R CTRL Room Out Studio Out AUX Send 1 8 Mono Out Direct Out Phones Out 600Ω 150Ω 600Ω 600Ω 600Ω 10Ω 40Ω 10Ω 600Ω 10Ω 100Ω 600Ω 150Ω 150Ω 75Ω 75Ω 150Ω 75Ω 600Ω 4dB Unbalanced Phone Jack 4dB 4dB 4dB 4dB 4dB 0dB 0dB 0dB 3mW XLR 3 32...

Page 42: ...5 9 Master LED Section 20 5 10 Master Bridge 21 6 Rear Panel Connectors 6 1 Input Section Connectors 22 6 2 Output Section Connectors 24 7 Wiring 7 1 General Wiring Prcedures 27 7 2 Initial Wiring Considerations 27 7 3 Audio Wiring 28 7 4 Shielding 28 8 Point to Remember 29 9 Audio Connectors 30 10 Grounding on the Road 31 11 Application Examples 33 11 1 Application 1 35 11 2 Application 2 36 11 3...

Page 43: ...2006 DapAudio ...

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