PDF CL-123 User Manual
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1. HI D ms o 0 dB Hz MID 2 1 5K bows o 0 dB Hz MID 1 b we o 0 dB Hz LO bows S 0 dB Se S x G 2 S E A Se Si KA Ka d x q E T5 B q dd os e e Fa e e feo x o amp x N io x o o e D So o os R 8 e of D e xt a e M Se o o So a se 8 D 2 e o o o 8 o S o A D e os e e xt q Ce ser o o 28 o 2 T A o ta o 8 8 o to o amp 2 o e e xt e q Se o N FIG 5 CL 123 Front Panel CL 123 User Manual Issue 0 1 Page 11 ARREL Audio APPENDIX C Back Panel SEND INSERT Q GO O O D Q Z D O x o 2 PHASE 3 PHASE e UI D MB 85 GR A E Ci 2 I o DESIGNED AND MANUFACTURED IN ITALY Z E OE gt EE lt e o AUDIO LY RED FUSE 0 5A FUSE kat gt E FIG 6 CL 123 Back Panel CL 123 User Manual Issue 0 1 Page 12 ARREL Audio APPENDIX E Measurements CL 123 FREQUENCY RESPONSE Signal Path1 Frequency Response Measured 1 25 12 2014 17 54 09 CL 123 FREQUENCY RESPONSE 25 12 2014 17 54 09 25 12 2014 17 54 09 Level dBu 20 50 100 200 E00 dk 2k 5k 10k 20k 50k Frequency Hz FIG 8 Frequency Response ale CL 123 HI LO GOZ Signal Path1 Frequency Response Measured 1 25 12 2014 17 53 13 CL 123 HI LO 25 12 2014 17 53 13 25 12 2014 17 532. 13 Level dBu 100 200 500 dk 2k 5k 10k 20k 50k Frequency Hz FIG 8 Frequency Response LPF and HPF CL 123 User Manual Issue 0 1 Page 13 ARREL Audio CL 123 LO BAND CL 123 LO BAND 25 12 2014 17 36 10 25 72 2014 17 37 35 Level dBu 500 Tk 2k Frequency Hz FIG 8 Equalizer LO Band Male CL 123 MID1 BAND OO Ben CL 123 MID1 BAND 20 12 2014 17 42 05 25 12 2014 1743 27 m co D b ed 500 1k Frequency Hz FIG 8 Egualizer MID 1 Band CL 123 User Manual Issue 0 1 Page 14 ARREL Audio do EZEZ CL 123 MID2 BAND eh CL 123 MID BAND 2512 2014 17 40 42 25 12 2014 17 46 02 Level dBu 100 200 500 Tk Frequency Hz FIG 8 Equalizer MID 2 Band judio Es CL 123 HI BAND Gk CL 123 HI BAND 20 12 2014 17 48 45 25 12 2014 17 50 11 3 GO JE Da Da Ea 500 Tk 2k Frequency Hz FIG 8 Equalizer HI Band CL 123 User Manual Issue 0 1 Page 15 ARREL Audio TECHNICAL SPECIFICATIONS umber of Channels ower Supply Linear Regulator 18 VDC Balanced C Core Transformer Operating Voltage 220V 50 Hz 110V 60 Hz version available 20W lectronically balanced ower Consumption Microphone Input 66 dB range with rotary knob control Theoretical max input level 24 dBu internally limited to 20 dBu ine Input Unbalanced Impedance 22 KQ this input can be also used as EQ input Microphone Gain 30 dB range with rotary knob control Line G
3. EE 11 APPENDIX Back E a kd da kona E iE iaiT 12 APPENDIX E MEIS WENEN E 13 ME 14 a 15 TECHNICAL SPECIFICATIONS AN 16 CL 123 User Manual Issue 0 1 Page 4 ARREL Audio INTRODUCTION The ARREL Audio CL 123 channel strip has been conceived to give to the professional user a unit that combines high reliability rugged design audio quality versatility and ease of use CL 123 is perfect for recording every kind of music from classic pop rock electronic and in all the situations where maximum sound quality and special attention to dynamic range and signal to noise ratio is needed The CL 123 technical specification shows that it is the perfect audio system for actual digital recording 24bit 192kHz environments where superior performance is required CL 123 is based on the use of the latest circuit topologies characterized by very low distortion ultra low noise and very wide frequency response The ARREL Audio CL 123 channel strip is composed by a high quality mic line preamplifier a four band parametric equalizer a level metering system and a flexible insert return The preamplifier architecture is based on two high dynamic range gain stages to avoid any saturation and the best possible linearity Even if the input stage of the CL 123 could accept input signals up to 24 dBu a protection circuit limits the input level at 20 dBu in order to prevent any damage The CL 123 extended input dynamic range avoids the necessity of
4. equalizer MIC LINE PREAMP The send out after the mic line stage is used as the output of the mic line preamplifier electronically balanced out level 4 dBu EQUALIZER The return is used as the preamplifier line input electronically balanced out level 4 dBu OUTPUT XLR The output signal is available on two XLRs the first one on the front panel Fig 3 the second one on the back panel Fig 6 The two connectors can be used together without problems CL 123 User Manual Issue 0 1 Page 9 ARREL Audio APPENDIX A Connections ARIEL ROSCH C L 123 CONNESSIONI WIRING CL 123 INGRESSO LINEA LINE INPUT Jack Mono 6 35 Mono Jack 1 4 Jack Mono 6 35 Mono Jack 1 4 Puo essere usato anche Jack stereo Stero Jacks can be used Jack Stereo 6 35 Stereo Jack 1 4 FASE Ga Se FASE PHASE ii PHASE MASSA MASSA MASSA GROUND GROUND GROUND INGRESSO MICROFONO XLR Posteriore duplicato sul pannello anteriore MICROPHONE INPUT XLR E possibile usare uno solo dei 2 ingressi On the back doubled on front panel It is possible to use one input only 3 1 Massa 1 Ground Moe Ss 2 FASE 2 PHASE 1 e e 2 af 3 FASE 3 PHASE Solo linea bilanciata Non connettere linee sbilanciate Balanced line only dont connect unbalancedc cables USCITA INSERZIONE XLR Posteriore INSERT SEND Jack Stereo 6 35 Sul pannello frontale XLR On the back S
5. M e 4 CL 123 RR e 4 EQ DISPL INS INS MASTER TRIM OFF POST POST OFF SEND RETURN Fig 3 CL 123 output section INS OFF SWITCH Push the button to turn off the insert point red LED on Press again to switch turn on the insert point red LED off Fig 3 LEVEL INDICATOR The output level Indicator is based on a 10 LED Bargraph 7 x green LEDs and 3 x red LEDs with measurement range 6 21 dBu The resolution in 1 5 dB per step The input signal to the level meter can be selected by the DISPL POST SWITCH Fig 3 The level measurement is not affected by MASTER TRIM control MASTER TRIM KNOB Rotate the master trim knob to change the output level in the range of 6 dB center detent potentiometer The Master Trim gain does not affect the level indicator Fig 3 SEND RETURN INPUT JACKS The insert and return connectors are available on the front panel 1 4 jack Fig 3 and on the back panel XLR connectors Fig 6 The front panel insert jack deselects the back panel insert connector In this way the user can permanently connect the most used outboard to the insert return connectors on the back and when a new outboard is required it can be connected by using the front panel connectors Automatically the back connected outboard will be disconnected In this way additional outboards can be easily connected without the access on the back panel IMPORTANT NOTE The CL 123 can be used as a separate mic line preamplifier and
6. NANG AUDIO REAL Innovation CL 123 Channel Strip 18 12 6 0 46 o o o o 6 0 0 beT a EQ DISPL INS MASTER TRIM OFF POST POST O kos O SEND RETURN User Manual ssue 0 1 ARREL Audio SAFETY INSTRUCTIONS N WARNING Alwavs follow the precautions listed below to avoid anv possibilitv of serious injurv or even death from electrical shock short circuiting damages fire or other hazards These precautions include but are not limited to the following e Do not expose the instrument to liquids and rain Do not use it near water or in damp or wet conditions or place containers on it containing liquids If any liquid seeps turn off the power and unplug the power cord from the AC outlet e Do not put burning items such as candles on the unit A burning item may fall over and cause a fire e This instrument contains no user serviceable parts Do not open the instrument or attempt to disassemble or modify the internal circuit e Never insert or remove an electric plug with wet hands e Check the electric plug periodically and remove any dirt or dust which may have accumulated on it e Do not place the power cord near heat sources such as heaters or radiators and do not excessively bend or otherwise damage the cord place heavy objects on it or place it in a position where anyone could walk on trip over or roll anything over it A CAUTION Always follow the precautions listed below to avoid
7. Web http www arrel audio com ARREL Audio Support ARREL Audio is continuously working to the improvement of its systems and related documentation In any case we reserve the right to change the specifications without notice but in the respect to the current legislation Disclaimer The information contained in this manual has been carefully checked and we believed is accurate at the time of publication In any case we do not assume any responsibility for inaccuracies errors or omissions nor any liability for any loss or damage resulting either directly or indirectly from use of the information contained in this manual CL 123 User Manual Issue 0 1 Page 3 ARREL Audio TABLE OF CONTENTS SAFE EHNEN Bea MASA LE 2 HOUSING EE 6 CL 123 Front Panel Controls and Operations Input Stage 7 lala dezi dezala ON D T PONO r OWE ANO E EEN et Ga CONT Ol KOD enituri aaa aa a a T LOC UT W NEE 4 ES NI Ee Di T CL 123 Front Panel Controls and Operations EQ stage essa 8 rei dele d COMMON aala e SE D I A CO AE DS DS A SU a 8 emphasis de emphasis control knob aa 8 eelste EE RE 8 CL 123 Front Panel Controls and Operations OUTPUT STAGE and general controls 8 EMO GWILCI NEE 8 GSU DOSES en AE 8 INS DOSESWILG D 8 NS OI WG E 9 Paue GUC ALON E 9 master TRIN AOD E 9 See dge Elak a ot Ee e T E E E E TT A AA a oi adro 9 OLLPUL E 9 APPENDIA CONNECHONG oa 10 APFENDA BD FOM FANE
8. ain Level 0 30 dBu Max 23 dBu andwidth 5 200 000 Hz 1dB perfect square wave up to 20 KHz Distortion Noise lt 0 003 typical 0 001 ow Cut Filter 80 Hz 12 dB Oct igh Cut Filter 8 KHz 12 dB Oct 4 band with overlapping frequencies 20 200 Hz 100 1 0 Hz 500 5 0 Hz 2 0 20 000 Hz Three Q settings narrow normal wide 14 dB gain range for emphasis de emphasis Outout Electronically Balanced j Level 4 dBu Max 28 dBu external load gt 600 Q nsert send Electronically Balanced lev 4 dBu max 28 dBu external load gt 600 Q nsert return Electronically Balanced lev 4 dBu max 23 dBu Input impedance gt 10 KO Gain rotary knobs min gain and level gain 48V Phantom Power switch Lo Cut and Hi Cut switches Phase Reverse switch 3 way Q settings toggle switch each band 14 dB range for boost cut Central Frequency rotary knob 4x push button for EQ off Pre Post EQ Display mode Pre Post Insert Insert off Output level rotary knob 1 4 TRS jack for kine input Balanced XLR female for microphone input 2x 1 4 TRS jacks for insert connections Send Return Balanced XLR male output Front Panel Indicators Level Indicator 10 LED Bargraph 7x green 3x red 1 5 dB step 4x red LEDs 48V Phantom Power Hi Cut Lo Cut Phase Balanced XLR female input Parametric EQ Front Panel Controls Front Panel Connectors Rear Panel Input Connectors Balanced XLR male output Bal
9. anced XLR female male for Insert Send Return W 483 mm 19 H 44 45 mm 1 75 1 U D 225 mm 8 86 Wem D n AC mains ight CL 123 User Manual Issue 0 1 Page 16
10. any possibility of serious injury or even death from electrical shock short circuiting damages fire or other hazards These precautions include but are not limited to the following e Do not connect the instrument to an electrical outlet using a multiple connector Doing so can result in lower sound quality or possibly cause overheating in the outlet itself e When removing the electric plug from the instrument or an outlet hold the plug itself and not the cord Pulling by the cord can damage it e Remove the electric plug from the outlet when the instrument is not to be used for extended periods of time or during electrical storms e Do not place the instrument in an unstable position where it might accidentally fall over e Before moving the instrument remove all connected cables e When setting up the product make sure that the AC outlet you are using is easily accessible If some trouble or malfunction occurs immediately turn off the power switch and disconnect the plug from the outlet Even when the power switch is turned off electricity is still flowing to the product at the minimum level e When you are not using the product for a long time make sure to unplug the power cord from the wall AC outlet e Use only the stand rack specified for the instrument When attaching the stand or rack use the provided screws only Failure to do so could cause damage to the internal components or result in the instrument falling over mmm Info
11. connected outboard In this way additional outboards can be easily connected with no access on the back panel In the CL 123 no compressor is provided This corresponds to a precise design choice In fact usually the compressor technology and consequently the compressor sound is a sort of artistic choice so ARREL Audio CL 123 give to the user the possibility to connect your preferred compressor as an insert CL 123 User Manual Issue 0 1 Page 5 ARREL Audio Differently from other channel strips the CL 123 is dedicated due to his absolute sonic level quality to high professional vocal recordings classical instruments high dynamic range instruments such as drums and percussions ARREL Audio products are designed and manufactured in Italy Housing The CL 123 has been designed to be compliant with a 1U rack No specific air conditioning is required for the racks provided that there is a free flow of air through the rack from front to back and the temperature is maintained in the operating range Consequently the racks may be stacked CL 123 User Manual Issue 0 1 Page 6 ARREL Audio CL 123 Front Panel Controls and Operations Input Stage INPUT SOURCE SELECTION The CL 123 input stage is based on a differential amplifier so it is electronically balanced If the Line In 1 4 jack is not inserted on the front panel the mic input is activated the insertion of the Line In jack disconnects the mic input Due to it
12. cut off frequency is 8 KHz 12 dB Oct Fig 1 CL 123 User Manual Issue 0 1 Page ARREL Audio CL 123 FRONT PANEL CONTROLS AND OPERATIONS EQ STAGE The same considerations can be applied to the three bands LO MID1 MID2 HI PHASE Fig 2 CL 123 EQ section FREQUENCY CONTROL KNOB The frequency band can be easily tuned by rotating the frequency Hz knob EMPHASIS DE EMPHASIS CONTROL KNOB Rotate the emphasis de emphasis control knob dB knob center detent potentiometer to change the frequency content in a range of 14 dB Q CONTROL SWITCH Turn the toggle switch to change the Q parameter Three positions are available narrow medium wide CL 123 Front Panel Controls and Operations OUTPUT STAGE and general controls EQ OFF SWITCH Push the button to turn off the equalizer red LED on Press again to switch to turn on the equalizer red LED off Fig 3 DISPL POST SWITCH Push the button to select DISPLAY POST red LED on In this position the level meter is connected at the output of the equalizer Press again to display the level at the out of the mic line stage red LED off Fig 3 INS POST SWITCH Push the button to select insert post red LED on In this position the insert point is after the equalization stage Press again to switch to have the insert point before the equalization stage red LED off Fig 3 CL 123 User Manual Issue 0 1 Page 8 ARREL Audio a MA
13. rmation for Users on Collection and Disposal of Old Equipment This special symbol on the products packaging and or accompanying documents means that used electrical and electronic products should not be mixed with general household waste For proper treatment recovery and recycling of old products please take them to applicable collection points in accordance with your national legislation and the Directives 2002 96 EC By disposing of these products correctly you will help to save valuable resources and prevent any potential negative effects on human health and the environment which could otherwise arise from inappropriate waste handling For more information about collection and recycling of old products please contact your local municipality your waste disposal service or the point of sale where you purchased the items For business users in the European Union If you wish to discard electrical and electronic equipment please contact your dealer or supplier for further information Information on Disposal in other Countries outside the European Union This symbol is only valid in the European Union If you wish to discard these items please contact your local authorities or dealer and ask for the correct method of disposal CL 123 User Manual Issue 0 1 Page 2 ARREL Audio ARREL Audio Contacts ARREL Audio Via A Mondadori 7 00128 Rome Italy Tel 39 06 506 2017 Fax 39 06 5062017 Info info arrel audio com
14. s very high dynamic range the ARREL Audio CL 123 does not require any input PAD switch Two XLRs for the mic input are available the first one on the front panel and the second one on the back panel Fig 1and Fig 6 Just one mic input at a time can be used PHANTOM POWER SWITCH Select the proper position of the switch to activate the 48 V Phantom Power red LED on To deselect the Phantom Power return to the previous position red LED off Fig 1 The switch is subminiature type short lever type in order to avoid accidental operations PHASE SWITCH Select the proper position of the switch to activate the phase inversion red LED on To deselect the Phantom Power return to the previous position red LED off Fig 1 The switch is of the subminiature type short lever in order to avoid accidental operations Fig 1 CL 123 Input section GAIN CONTROL KNOB Turn the gain knob in order to select the required amount of gain for either the mic input or the Line input The maximum gain of the mic input is 66 dB The gain of the Line input is 30 dB Fig 1 LO CUT SWITCH Normal operation LO CUT filter not inserted switch in down position LO CUT filtering activated with the switch in the up position The filter cut off frequency is 80 Hz 12 dB Oct Fig 1 HI CUT SWITCH Normal operation HI CUT filter not inserted switch in down position HI CUT filtering activated with the switch in the up position The filter
15. tereo Jack 1 4 On the front panel XLR p d m 1 Massa 1 Ground ie deiez 2 FASE 2 PHASE Z 3 FASE 3 PHASE Linea bilanciata Possibile connettere linee sbilanciate Balanced line Unbalanced cables can be connected Jack Stereo 6 35 Stereo Jack 1 4 FASE PHASE MASSA FASE GROUND PHASE RITORNO INSERZIONE XLR Posteriore Jack Stereo 6 35 Sul pannello frontale INSERT RETURN XLR On the back Stereo Jack 1 4 On the front panel XLR l i q 1 Massa 1 Ground ie i 2 FASE 2 PHASE k 3 FASE 3 PHASE Linea bilanciata Possibile connettere linee sbilanciate Balanced line Unbalanced cables can be connected Jack Stereo 6 35 Stereo Jack 1 4 a FASE PHASE MASSA FASE GROUND PHASE USCITA MASTER XLR Posteriore duplicato sul pannello anteriore MAIN OUTPUT E possibile usare contemporaneamente tutte e due le uscite XLR On the back doubled on front panel It is possible to use both output 3 1 Massa 1 Ground N 2 FASE 2 PHASE 1 e e 2 3 FASE 3 PHASE Linea bilanciata Possibile connettere linee sbilanciate Balanced line Unbalanced cables can be connected FIG 4 CL 123 Connections CL 123 User Manual Issue 0 1 Page 10 ARREL Audio APPENDIX B Front Panel 6 LI LI 3 43 LI LI LI 6 MASTER TRIM 18 12 6 0 6 e e e o EQ DISPL INS INS OFF POST POST OFF Hz
16. the input pad and the gain is controlled by a single large knob The absence of the input pad means better sonic performances In fact being it an attenuator it deteriorates the sound quality and reduces the signal to noise ratio The channel strip contains a special circuit that allows the connection of microphones even if the unit is turned on with the Phantom Power activated in any case we do not recommend this practice in order to protect your microphones CL 123 also provides a four band fully parametric EQ with High Cut Low Cut filters at fixed cut off frequencies 80 Hz 12 kHz which can be activated by a switch Each filter stage is completely excluded from the main circuit if not in use The emphasis de emphasis adjustment is based on a special circuit topology that guarantees a very linear and accurate control The flexibility of the CL 123 chamnel strip is increased by a level meter mic line out or equalizer out measurements and an insert point send and return electronically balanced available both on the front panel and on the back panel The insert point can be configured either as pre eq or post eq The insert jacks on the front panel deselect the outboard connected on the back panel In this way the user can permanently connect the most used outboard to the insert return connectors on the back panel and when a new outboard is required it can be connected by using the front panel connectors disconnecting automatically the back
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