MX1204 User`s Manual
Contents
1. PEAK LED This red LED lights when the input signal is too high Lower input GAIN or source level when this occurs FADER Use only to fade the channel in or out during the performance This is not a volume control 4 INPUT OUTPUT CONNECTIONS NS 25 fits 9 AUX 1 SEND e Unbalanced phone jack Tip om 6 6 Sleeve TS The sum of all signals STEREO AUX RETURN AUX SENOS sent to the AUX 1 bus are output here NOTE All feeds to the AUX 1 bus are pre fader also known as AUX 2 SEND Unbalanced phone jack TS The sum of all signals sent to the AUX 2 bus are output here NOTE All feeds to the AUX 2 bus are post MAIN OUTPUTS fader also known as wet STEREO AUX 1 RETURN n Balanced phone jack TRS The STEREO AUX 1 RETURN is sent to the LEFT RIGHT bus If only the LEFT input jack is used the signal is sent to both the LEFT and RIGHT channels MONO STEREO AUX 2 RETURN n Balanced 1 4 phone jack TRS The STEREO AUX 2 RETURN be sent to either the LEFT RIGHT bus orthe ALT 3 4 bus If only the LEFT input jack is used the signal is sent to both the LEFT and RIGHT MONO ALT 3 4 OUTPUTS Unbalanced phone jack TS All signals sent to the ALT 3 4 bus with the MUTE switches are combined and sent to these output connectors CONTROL ROOM OUTPUTS L and R Unbalanced phone jack TS Normally used to provid2. and headphone PHONES outputs TAPE PUSHBUTTON When depressed assigns the LEFT and RIGHT TAPE input signals to the control room CTRL R and headphone PHONES outputs CTRL R amp PHONES Adjusts the level of the signal sent to the control room and headphone outputs TAPE TO MAIN PUSHBUTTON Press to send the TAPE input directly to the LEFT RIGHT bus MAIN MIX Typically used for playback monitoring or adding pre recorded elements to the mix LED VU METER These LEDs indicate the signal level of the MAIN MIX For best results avoid operation above OdB Occasional flashing of the 5dB or even the 10dB may be allowable but operation with the CLIP LEDs flashing must be avoided 48V LED Condenser microphones require an external power supply to operate This blue LED lights whenever the 48 volt microphone phantom power is on The on off switch for the phantom supply is located on the rear panel of the console e When the phantom supply is on 48V is sent to all four of the microphone connectors You may use either dynamic or condenser microphones while the phantom power is on e Never use a balanced to unbalanced adapter when the phantom power is POWER LED This red LED lights whenever the console is on The AC power switch is located on the rear panel of the console These faders control the LEFT and RIGHT MAIN MIX output levels See MAIN OUTPUTS page 9 Use these f
3. Output impedance 1200 unbalanced Maximum output level 22dBu HEADPHONES OUTPUT Unbalanced phone jack TIP Left RING Right SLEEVE ground Output impedance 1200 unbalanced Maximum output level 19dBu into 1500 25dBm MAIN MIX SYSTEM NOISE Main mix channel fader 105dB 108dB A weighted reference level 6dBu Main mix channel fader 0 dB 95dB 97dB A weighted reference level 6dBu Main mix 0 dB channel fader 0 dB 82 5dB 85dB A weighted reference level 6dBu Measured at MAIN OUT Measurement band pass 20Hz 20kHz Channels 1 4 unity gain all EQs flat all channels on MAIN MIX Channels 1 3 balance full CCW Channels 2 4 balance full CW POWER CONSUMPTION 100 240VAC 40W Fuse T1 6AH DIMENSIONS H 97mm 3 7 8 W 247mm 9 11 16 D 328mm 13 2 56kg 5 5 8 Ibs 11 REAR PANEL CONNECTIONS AND SWITCHES 12 CHANNEL 4 BUS MIXER MODEL MX1204 ACON OISE DESIGN Podium ACTUSE Pro Audio 110 230V 50 80Hz POWER PHANTOM ON ON AC FUSE 1 Amp AC fuse located under panel on AC cord connector AC CORD CONNECTOR Standard IEC 3 wire power cord receptacle A C POWER ON OFF SWITCH MICROPHONE PHANTOM POWER ON OFF SWITCH INSTALLATION e The 1204 is designed for indoor use Never use a location where the unit may get wet e NEVER defeat the safety ground provision of the IEC power cord e console has ventilation slots on the sides of the enclo
4. re Our LO MID HI 2o y ee ball E RIGHT TO MAIN gt BALANCE MUTE ALT3 n MAIN MIX LEFT i MAIN 6 ALT3 ALT3 PEAK SOLO STEREO AUX Ss 1 LEFT AUX ae 1 gt RIGHT BUS gt ALT 4 D LEFT BUS RIGHT BUS STEREO AUX RETURN 2 heals MAIN ALT 3 4 LEFT BUS ALT3 gt LEFT MONO RIGHT BUS gi gt gt Hx 5535 Podium Pro Audio 1204 BLOCK DIAGRAM
5. B 135 7dB A weighted Source impedance 500 131dB 133 3dB A weighted Source impedance 1500 129dB 130 5dB A weighted Distortion THD N 0 005 0 004 A weighted MONO LINE INPUTS Balanced 1 4 phone jack RING SLEEVE ground Frequency Response 0dB 1dB lt 10Hz to 90kHz 0dB 3dB lt 10Hz to 160kHz Input impedance 20kQ balanced 10kQ unbalanced Gain Range 10dB 40dB Maximum Input Level 30dBu Channel to Channel Crosstalk Main faders closed 90dB reference level OdBu Channel faders closed 89dB reference level OdBu Channels muted 89 5dB reference level OdBu 1kHz sine wave applied measurement band pass 20 2 20 2 STEREO INPUTS Balanced 7 phone jacks TIP RING SLEEVE ground Input impedance 20kQ balanced Maximum input level 22dBu ALL EQUALIZERS LOW 15dB 80 2 shelving MID 15dB 2 5kHz HI 15dB 12kHz shelving AUX SENDS Unbalanced phone jacks SLEEVE ground Output impedance 1200 Maximum output level 22dBu STEREO AUX RETURNS Balanced phone jacks RING SLEEVE ground Input impedance 20 balanced Maximum input level 22dBu MAIN OUTPUTS Balanced XLR PIN 1 ground PIN 2 PIN 3 Output impedance 2400 balanced 120Q unbalanced Nominal output level 4dBu Maximum output level 28dBu CONTROL ROOM OUTPUTS Unbalanced phone jacks SLEEVE ground
6. Podium Pro Audio Model 1204 12 Channel 4 Bus Mixing Console User s Manual INTRODUCTION 2 MX1204 FEATURES 2 BEFORE YOU BEGIN 2 USING THIS MANUAL 2 ABOUT THE MX1204 BLOCK DIAGRAM 2 MONO INPUT CHANNELS 1 4 3 4 STEREO INPUTS 56 7 8 35 Podium Pro Audio MAIN MIX AND ALT 3 4 CONTROLS 38 Audio at its highest level INPUT OUTPUT CONNECTIONS 1204 BLOCK DIAGRAM 6 7 poaliiniproauaie con REAR PANEL CONNECTIONS AND SWITCHES 10 2010 4 INTRODUCTION The Podium Pro Audio MX1204 audio mixing console brings premium quality audio processing circuitry into the compact desktop class of mixers Carefully designed signal routing phantom microphone power fully balanced design and versatile effects loops allow this console to provide un matched performance and flexibility Used in accordance with the information provided in this manual this product will give years of trouble free use MX1204 FEATURES e Four studio grade Invisible ultra low noise microphone MIC Preamps Four balanced line inputs Direct coupled signal processing e Internal switch mode power supply allows operation on 100 to 240VAC e Rugged steel construction provides superior noise shielding BEFORE YOU BEGIN Read and follow these instructions Heed all warnings Do not use where the mixer may get wet Do not obstruct airflow through the ventilation slots Never defeat the AC polarizing
7. aders like a These faders control the ALT 3 and ALT 4 output levels The left 8 909 fader controls ALT 3 The right fader controls ALT 4 82 27 AUX 1 SEND Adjusts the output level of AUX 1 SEND output only Typically used 2599 to control the stage monitor speakers AUX 2 SEND Fx Adjusts the output level of AUX 2 SEND only Typically used to Adjusts the level of the incoming signal which is mixed with the The STEREO AUX 1 RETURN signal is summed to mono pre fader and sent to the AUX 1 bus This allows the application of Adjusts the level of the STEREO AUX 2 RETURN signal STEREO INPUT CONNECTIONS AND CONTROLS y MONO L 1 BAL OR UNBAL R LEVEL D LINE 5 6 5 6 2 FADER MONO L Balanced phone jack TRS LEFT or MONO line level input NOTE When only the MONO L input jack is used the signal is sent to both left and right channels MONO Balanced phone jack TRS RIGHT line level input LEVEL Use this pushbutton switch to set the circuit gain to either 4dB OUT or 10dB IN HI EQ Adjusts high frequencies up or down Set to 0 center detent for no EQ MID EQ Adjusts mid frequencies up or down Set to 0 center detent for no EQ LOW Adjusts low frequencies up or down Set to 0 center detent for no EQ MON PRE 1 Adjusts the signal level sent to the AUX 1 bus MON PRE is before pre FADER This
8. e line level signal to the monitor speakers in the control room TAPE INPUT Unbalanced phono jacks RCA Normally used for a 2 track recording device input TAPE INPUT can also be used as an additional stereo line level input For example additional sound elements can be added to the mix from a CD player iPod MP3 player or computer TAPE OUTPUT Unbalanced phono jacks RCA Wired in parallel with the MAIN OUTPUTS Normally connected to the inputs of a 2 track recording device PHONES Unbalanced phone jack stereo TRS You can connect monitoring headphones here This output is the same signal as the CONTROL ROOM output MAIN OUTPUTS Balanced XLR jacks The LEFT and RIGHT MAIN MIX signals are available here MAIN MIX AND ALT 3 4 CONTROLS MAIN MIX FADERS system volume control ALT 3 4 FADERS control the signal level sent to external processor s STEREO AUX 1 RETURN LEFT RIGHT bus STEREO AUX 1 RETURN PRE effects to the stage monitors STEREO AUX 2 RETURN MAIN ALT 3 4 This push button assigns the STEREO AUX2 RETURN either to SES the LEFT RIGHT bus MAIN MIX or to the ALT 3 4 bus MAIN MIX PUSHBUTTON When depressed assigns the stereo MAIN MIX signal to the control room CTRL R and headphone PHONES outputs ALT 3 4 PUSHBUTTON When depressed assigns the ALT 3 4 bus signal to the control room CTRL
9. inputs are provided The line level inputs are balanced TRS jacks MAIN MIX AND ALT 3 4 CONTROLS DETAILS ON PAGE 8 After all sources have been selected equalization set and effects loops created all sources are summed onto the LEFT RIGHT MAIN BUS and the ALT 3 4 BUS are used to control the overall level of the mix There are numerous routing options from this point forward Here you will find the controls for the MAIN MIX level ALT 3 4 level AUX send return control room and headphones INPUT OUTPUT CONNECTIONS DETAILS ON PAGE 9 you will find all remaining input output connections This is where the MX1204 interfaces with the rest of the studio MONO LINE INPUT CONNECTIONS AND CONTROLS MIC INPUTS 1 4 Balanced XLR microphone input jack PIN 1 ground PIN 2 signal PIN 3 signal Phantom 48VDC supply PINS 2 and 3 when activated Ribbon condenser and dynamic microphones are accommodated LINE INPUTS 1 4 Balanced phone jack TRS Line level input 7 NB signal RING signal SLEEVE ground LINE IN 2 3 Any line level source balanced or unbalanced can be inserted here 762 LOW CUT PUSHBUTTON 4 When on reduces low frequency sounds such as air conditioning traffic and MIC stand vibrations Specifications 75Hz 18dB octave rolloff GAIN Rotary or LINE i
10. means FADER adjustments will not change the signal level being sent to the AUX 1 bus FX post n FX is shorthand for Effects reverb echo EQ If you wish to route the signal through an external device effect you would normally route it to the AUX 2 bus This control adjusts the signal level sent to the AUX 2 bus FX Post is after or post FADER This means FADER adjustments will change the signal level being sent to the AUX 2 bus allowing the level of the external effect to follow the FADER BAL Adjusts the relative signal level BALANCE sent to the LEFT RIGHT bus 5 6 MUTE 3 4 PUSHBUTTON n The channel output normally goes to the LEFT RIGHT bus When 5 6 MUTE ALT 3 4 is depressed the signal is re directed to the ALT 3 amp 4 bus which has the effect of muting the main output and making it available for headphone monitoring MUTE LED This yellow LED lights whenever the 5 6 MUTE ALT 3 4 is depressed PEAK LED This red LED lights when the input signal is too high Lower source level when this occurs Use only to fade the channel in or out during the performance This is a volume control 5 MONO INPUT CHANNELS 1 4 3 AUX SEND MON AUX SENDS PHANTOM a 48 0 GAIN LO MID 2 SEND f 1 FADER PAN MUTE ALT3 4 LEFT Bus AUX SEND FX gt gt lt lt LO CUT T HIPASS LINE IN i RIGHT BUS STEREO INPUT CHANNELS 5 8
11. nput sensitivity control Use to set the level of this channel relative to other inputs Thus creating the desired mix Do not use as a fader HI EQ Adjusts high frequencies up or down Set to 0 center detent for no EQ MID EQ Adjusts mid frequencies up or down Set to 0 center detent for no EQ LOW EQ Adjusts low frequencies up or down Set to 0 center detent for no EQ MON PRE n Adjusts the signal level sent to the AUX 1 bus MON is before or pre FADER This means FADER adjustments will not change the signal level being sent to the AUX 1 bus FX post n FX is shorthand for Effects reverb echo EQ If you wish to route the signal through an external device effect you would normally route it to the AUX 2 bus This control adjusts the signal level sent to the AUX 2 bus FX POST is after or post FADER This means FADER adjustments will change the signal level being sent to the AUX 2 bus allowing the level of the external effect to follow the FADER PAN Adjusts the relative position of the sound across the stage left center right MUTE att 3 4 PUSHBUTTON The channel output normally goes to the LEFT RIGHT bus When MUTE ALT 3 4 is depressed the signal is re directed to the ALT 3 amp 4 bus which has the effect of muting the main output and making it available for headphone monitoring MUTE LED This yellow LED lights whenever the MUTE ALT 3 4 is depressed
12. or safety ground on the AC cord Be certain all equipment is OFF before making or breaking connections Clean console only with a damp not wet cloth Refer all service needs to qualified personnel There are no user serviceable components inside USING THIS MANUAL Having a basic understanding of what a mixing console does is very important This manual breaks the console down into basic function blocks Details of all controls and connections are provided for each block ABOUT THE MX1204 BLOCK DIAGRAM To get the most out of your MX1204 mixer you will need a thorough understanding of what the console is doing To help you a block diagram of the circuitry has been provided on pages 6 and 7 A block diagram is a simplified schematic which illustrates signal flow from input to output and shows the numerous routing variations possible Throughout this manual you will frequently see the opamp symbol h This indicates that the current topic may be better understood by reviewing the block diagram SPECIFICATIONS MICROPHONE INPUTS Balanced XLR PIN 1 ground PIN 2 PIN 3 Frequency Response 0dB 1dB lt 20Hz to 40kHz 0dB 3dB lt 20Hz to 100kHz Gain Adjustable 10dB to 60dB Maximum Input Level gain set to 10dB 12dBu Input Impedance 2 6kQ balanced Signal to Noise ratio Re OdBu in 22dB gain 110dB 112dB A weighted Equivalent Input Noise 20Hz to 20kHz Source impedance 00 134d
13. sure Do not install the console in such a way as to block airflow through the unit CONNECTOR WIRING You will need many cables to complete the installation Many more will be required for signal patching during sessions Pre fabricated cables may not always fit your needs and sometimes onsite repairs are necessary The following illustrations show the correct connector wiring Balanced Mono Unbalanced 1 4 TRS Phone Plug 1 4 Phone Plug Headphone Stereo 1 4 TRS Phone Plug Tip Tip Tip LEFT Signal Ring Ring RIGHT signal Sleeve ground Sleeve Ground Sleeve Ground i Tip Tip i Ring Sleeve Sleeve i Wire Clamp Wire Clamp Unbalanced XLR Cable MONO MIC LINE INPUT CHANNELS 1 4 DETAILS ON PAGE 4 There are four identical MONO input channels located on the left of the console These channels are organized vertically At the top is an XLR microphone MIC input jack 48V phantom power is available for condenser MICs Next is a Tip Ring Sleeve TRS line level LINE input jack Each MONO channel can be used as either a MIC or LINE input The other controls provide a wide variety sound shaping and gain adjustments as well as signal routing and external processing STEREO INPUTS 5 6 7 8 DETAILS ON PAGE 5 There are two STEREO inputs 4 mono channels These channels are organized just like the MONO MIC LINE channels and have the same controls and capabilities However no MIC
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