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ENGLISH

Model AD 1823

18-CHANNEL ANALOG MIXER

OWNER’S MANUAL

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Summary of Contents for AD 1823

Page 1: ...ENGLISH Model AD 1823 18 CHANNEL ANALOG MIXER OWNER S MANUAL ...

Page 2: ...e The exclamation mark inside an equilateral triangle indicates thepresence of important operating and maintenance servicing instructions in the literature accompanying the product INSTRUCTIONS PERTAINING TO A RISK OF FIRE ELECTRIC SHOCK OR INJURY TO PERSONS WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE CAUTION TO REDUCE THE RISK OF ELECTRIC SH...

Page 3: ...ade wider than the other This is a safety feature If you are unable to insert the plug into the wall socket contact an electrician to replace your obsolete wall socket Do not defeat the safety purpose of the plug The mixer should be connected to the power supply unit only with the mains lead power cord supplied WARNING Do not place objects on the mixer s mains lead power cord or place the lead cab...

Page 4: ...e interference disappears and then switching it on again to see if it reappears the user is encouraged to try to correct the interference by carrying out one or more of the following measures 1 Turn the radio or TV aerial antenna to face in a different direction 2 Change the instrument s position with respect to the receiver 3 Move the instrument away from the receiver 4 Plug the instrument into a...

Page 5: ...ng is required never use petrol alcohol thinners or other solvents as these will cause damage to the surface finish and silk screening of the panels and outside of the instrument FURTHER PRECAUTIONS If you need to use the instrument in a foreign country you should first consult a qualified service technician if you have any doubts regarding the power supply suitability etc The instrument should ne...

Page 6: ...LEFT OUTPUT and RIGHT OUTPUT 15 7 1 3 AUX 1 AUX 2 and AUX 3 OUT 15 7 1 4 HEADPHONE 15 7 1 5 STEREO RETURN 15 7 1 6 TAPE IN TAPE OUT 15 7 2 PUSH BUTTON CONTROLS 16 7 2 1 POWER ON 16 7 2 2 PHANTOM 48 V 16 7 2 3 AUX 2 PRE POST 16 7 2 4 AUX 3 PRE POST 16 7 2 5 EFX RTN TO AUX 2 16 7 2 6 EFX RTN TO AUX 3 16 7 3 METERING 16 7 4 MONITORING 16 8 INPUT OUTPUT PLUG CONNECTIONS 17 8 1 JACK AND XLR CONNECTIONS...

Page 7: ...ation 1 2 TECHNICAL TERMS The terminology used in this manual should not present difficulty in understanding the various functions as no unusual terms are used but in the unlikely case of a term not being understood and it is not fully explained in the text itself please consult the GLOSSARY OF TERMS at the end of this manual 1 3 CONTROL REFERENCES In this Owner s Manual each control and push butt...

Page 8: ...RT REAR PANEL LEFT OUTPUT RIGHT OUTPUT AC POWER IN S 4 PB 2 S 5 S 6 S 9 S 8 S 7 PB 3 S 12 S 11 S 10 S 13 PB 4 PB 5 S 3 L 1 AD 1823 CONTROL PANEL REFERENCE CHART S 14 PB 10 S 1 2 L 4 PB 7 PB 8 S 15 S 16 PB 9 PB 1 L 2 L 3 PB 6 TOP PANEL ...

Page 9: ...ted with PFL Pre Fade Listening and status LED L 4 in the Master section see diagram below in Master Output TAPE IN TAPE OUT CONNECTIONS Connection of Tape Input and Tape Output are provided in the top right hand corner of the panel with the possibility to adjust the volume of the input signal TAPE IN S 14 These sockets can be also be used for stereo effects return Aux returns MASTER OUTPUT Main M...

Page 10: ... quality 2 4 GROUND This mixer uses the lifted ground principal meaning that the ground lines of the internal circuitry are isolated from the main chassis This method effectively eliminates hum Never plug the PSU into the mixer when it is connected to the AC mains supply Always first connect the PSU to the AD 1823 then plug the unit into the AC supply 2 5 SWITCHING ON The mixer is switched ON by m...

Page 11: ...rol section Pressing the Routing button of CH 2 CH 9 10 puts the MONO Mic Line input CH 2 under the influence of the main control section of these inputs and routes the STEREO keyboard inputs CH 9 10 together with the previously routed CH 7 8 to the third section and so on It will be seen that using this principle each set of inputs and those routed from the previous channels can be routed either ...

Page 12: ...the MONO IN GAIN slider S 5 4 2 H P FILTER This High Pass filter very uncommon in mixers at this level is very useful for removing POP disturbance from microphones or wind noise when miking guitar amps in outside locations Control of the Cut Off Frequency shift is obtained by the H P FILTER slider S 6 giving a bandpass over 75 Hz in the centre position moving up to 300 Hz in the maximum position T...

Page 13: ... designed to give a smooth mix up down of the signal from each channel 4 7 MUTE Each channel is implemented with a MUTE push button PB 4 which effectively has the same function as setting the LEVEL slider S 3 to zero silencing the entire channel at the touch of a button This also mutes all AUX sends although they may switched to PRE FADER This of course avoids the ridiculous situation where althou...

Page 14: ...eft input signals should be connected to the Ring and Tip of the Stereo plug respectively The level of the input to these channels is controlled by the STEREO IN LEVEL S 4 The range of this control is from 10dB therefore functioning as a real volume control 5 1 INPUT LEVEL The same procedure as for the Mono channels should be followed see 4 1 All the other controls for the Stereo channels 3 BAND E...

Page 15: ...ed 6 2 AD 1823 INSERTS Four inserts are provided on the channels of the AD 1823 These employ the same jack as the Mono Line In and should be connected using the Stereo jack wiring for the Pre Gain Inserts shown shown in Fig 8 1 on page 16 In this case the Send signal is connected to the Ring of the jack and the Return signal to the Tip This is different to some systems so check out any leads you m...

Page 16: ...while AUX 2 Out and AUX 3 Out are Mono These last two mentioned outputs can be both Pre or Post fader by selection with the relative push buttons AUX 2 PRE POST and AUX 3 PRE POST PB 7 and PB 8 respectively The signal from each channel is fed to these Aux Out busses through individual AUX 1 POST STEREO S 10 AUX 2 PRE POST S 11 and AUX 3 PRE POST S 12 sliders which determine the level to each of th...

Page 17: ...enerally used for external effects processor signal sends 7 2 5 EFX RTN TO AUX 2 PB 9 When pressed this button will direct any effects connected to the Stereo Return socket to the AUX 2 bus meaning that it will influence any signal from the AUX 2 OUT socket 7 2 6 EFX RTN TO AUX 3 PB 10 When pressed this button will direct any effects connected to the Stereo Return socket to the AUX 3 bus meaning t...

Page 18: ...u mute all PA monitor speaker units before turning the Phantom Power On or Off Allow a short period of time to elapse after switching the system On to allow the levels of the circuitry to settle before setting the input gains 1 4 Mono Jack Plug 1 4 Stereo TRS Jack Plug Use for Mono Line In Left Right Stereo In Right In Mono Aux 2 Out Aux 3 Out Use for Left Stereo In Headphone Aux 1 Out Stereo Retu...

Page 19: ...t while maintaining the channel signal flow Tip Ring Sleeve Ground Screen Ring Send Signal Tip Return Signal Sleeve To Channel Insert To Tape or FX Input To Channel Insert To Processor Output To Processor Input Fig 8 2 2 Y Stereo lead for Insert Connection To be used when the processor does not employ a single jack connection for the In Out connections Fig 8 2 Jack plug connections for Special App...

Page 20: ...d Press the ROUTING push button PB 2 to send the Mono Input signals through the Channel Main Control Section vice versa in the UP position this button directs the Stereo Input signals through this section see Section 3 for complete Routing System explanation According to what input is being set up and the Routing selected for this either follow the instructions in c d e or proceed to f c Set all A...

Page 21: ...0 dB These generally read 0 dB with some tolerance left athough this is not always the case especially with samplers The reason for this tolerance is because digital distortion unlike with analogue is very sudden and the efect is really unpleasant To push your recording levels to the maximum making full use of the 96 dB dynamic range of 16 bit Digital equipment you ll have to some calibration You ...

Page 22: ...urate uncalibrated sampler input meters Find out how hard you can safely push the sampler s input refer this to 0 dB on an AD 1823 output PFL then take note of the same input gain slider setting Now you can use the LED bargraph meters to confirm level when sampling much better than using the Sampler s input level display 9 7 TRACK ASSIGNMENT When setting up the channels for recording or mixing try...

Page 23: ...g Spectrum Analyzer Parametric Equalizer Graphic Equalizer and Crossover When more advanced equalization is required try this first adjust the Low and High frequency shelves to create the required slope or loudness controls similar to a domestic HiFi Amplifier Then boost the required frequency for each instrument or tape track with a band in a parametric equalizer Throughout all the channels in th...

Page 24: ...h higher but remember not to create distortion The levels of each channel should always be at about 0 dB when recording or mixing if they are gradually moving up or down the channel LEVEL sliders S 3 should be adjusted accordingly 10 3 UN BALANCED LINE CONNECTIONS Why are balanced line connections used Even though all audio signal cables except speaker cables have earthed screening the shielding i...

Page 25: ...tem work Instead of connecting the negative signal to earth as in an unbalanced system at the same time losing half the signal or 6 dB the two lines are kept separate until they reach an electronically balanced input or transformer Now the explanation The amplification of a signal causes the reversal of its polarity By inverting the negative side and adding it in a ratio of 1 1 to an unchanged pos...

Page 26: ...inema 1 Cinema 2 Cavern 1 Cavern 2 Large Hall 1 Large Hall 2 Large Hall 3 Church Concert Hall Cathedral PLATES Dark Plate 1 Dark Plate 2 Dark Plate 3 Wood Plate 1 Wood Plate 2 Wood Plate 3 Metal Plate 1 Metal Plate 2 Metal Plate 3 Metal Plate 4 DELAY MONO Single Short Reflection Mono Single Med Reflection Mono Single Long Reflection Mono Short Delay Decay 1 Mono Short Delay Decay 2 Mono Short Dela...

Page 27: ...g screws are supplied for the mechanical fixing to the mixer case All this makes it possible to mount the amplifier and the mixer as a single unit There are 2 Speakon connectors on the back enabling the connection of 2 adequately rated passive speaker units The amp can be easily installed directly by the user Technical Specifications Output Power 200 200 W Impedance 8 Ohm Frequency Response 30Hz 2...

Page 28: ...d signal for the mixer Dry Signal A signal with no effects Effects abbr FX or EFX Devices that alter the original dry sound or add something to it e g Delay Echo Reverb etc Equalizing The use of filters for cutting or boosting selected frequencies Fader Linear potentiometer with logarithmic response Feedback howiround Unstable circuit e g mic speaker input output where a signal is able to return t...

Page 29: ...ter A variable control which can be in rotary or cursor form slider Used for gain frequency tone control etc Q Efficiency For example if a circuit is described as being High Q it means that it is a high efficiency circuit Route Signal path routing matrix series of switches for route selection Routing matrix Series of switches for route selection Solo Solo in place stereo image retained Source Sign...

Page 30: ...29 Corso Persiani 44 62019 Recanati MC Italy www etekengineering com Info etekengineering com ...

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