C:\DMCL User\DMCL User Guide V2.0 English.vp
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1. 20 INPUTS A COMPRESSOR A FILTERS B Compressor Threshold Adjusts the level setting at which gain reduction begins to occur The range is 40dB to 224 Attack Changes the time over which compression begins to occur The range is 0 3 to 300mS Release Determines the time taken for the gain reduction to stop being applied The range is 0 1 to 10 Seconds Ratio Changes the severity of the gain reduction once the signal exceeds the threshold setting The range is 1 1 no compression to 40 1 limiting amp MM and Much More Selects a different shape to the compression curve which musically emulates the best of my past designs Output Gain Using compression causes the output signal level to be reduced This drop in the output level is therefore compensated for using the output gain control The gain range is 10dB to 24dB In Switches the Compressor into the signal path Installation Location This product is designed and screened to minimise internal electromagnetic emissions and provide immunity to external electromagnetic fields To reduce the risk of performance degradation due to external interference do not site this unit close to sources of strong magnetic fields such as power supplies power amplifiers loudspeakers etc Rack Mounting This product is designed to be rack mounted using the screws and washers supplied to help preserve the finish of the facia panel The facia graphic la2. 0 02 10Hz to 200kHz 3dBu 93dBu 0 0007 40dBu 26dBu lt 75 ohms 10Hz to 200kHz 3dBu 105dBu 0 0007 60dBu 26dBu gt 10k ohms 20 Specifications Mic Input Frequency Response Unity gain setting 150 ohm source Gain Range Unity to 66dB in 6dB steps and 12dB variable trim Input Impedance T LA Input Impedance Input Balance 1kHz Equivalent Input Noise DIN Bandwidth 22Hz 22kHz Measurement with gain at 6688 nput terminated with 150 ohms Measured with gain at 36dB nput terminated with 150 ohms Measured at unity gain nput terminated with 150 ohms Harmonic Distortion Unity gain setting nput Output level 20dBu THD measured 1kHz Maximum Input Level T LA Unity gain Line Input 10Hz to 200kHz 3dBu gt 5 000 ohms 60dBu 128dBu 127dBu 100dBu 0 0007 26dBu Line Input Cont NN ag Harmonic Distortion Unity gain setting input output level 20dBu THD measured 1kHz Maximum Input Level Balanced and floating transformer Input unity gain Instrument Input 0 0007 26dBu Important Safety Instructions Instructions de S curit Importances Cautions Warnings and Notes Please read this manual carefully before connecting this apparatus to the mains for the first time For your own safety and to avoid invalidation of warranty all text marked with these Safety Symbols should be read
3. Notes A Few Words from Rupert The digital age imposes completely new considerations for high performance analogue audio design and brings both advantages and disadvantages with it These considerations cause us to completely re think how to get the very best out of each new design such as the specifically designed transformers have incorporated into Pure Path technology The Pure Path Dual Mic Amp Compressor Limiter or DMCL is the result of these careful considerations and designed to meet the changing needs of engineers and producers for a powerful yet compact outboard unit combining the features they might wish for in their console of choice The DMCL comprises of two identical closely matched Microphone and Line amplifiers followed by a high resolution Compressor Limiter with pre post High and Low Pass Filters The Microphone Amplifier makes use of techniques which provide many of the advantages of a transformer without the penalty of weight and cost In common with my previous designs for the 9098i Console and SYSTEM 9098 outboard equipment it features very low noise even at mid gain settings and can accept a full 26 dBu input signal at unity gain Because of the increasing use of outboard equipment in the Control Room have added a balanced INSTRUMENT input to each of the Microphone Amplifiers These are accessible by 14 stereo jack on the front panel and have a very high input impedanc
4. Two Channel Mode Byte 0 bits 6 amp 7 and Byte 4 bits 3 6 are programmed according to the relevent sampling frequency Note The channel status settings in the AES data stream ALWAYS follow the switch setting of the unit even if the unit is synced to an external source Contents Table of Contents A Few Words from Rupert Unpacking Important Safety Instructions Installation Audio Connections Connections Compressor Link Signal Paths Operational Guide Mic Input Instrument Input Block Diagram Operational Guide Line Input Filters Compressor Digital Output Option Key Insert Option Specifications Warranty an gt 10 10 11 11 11 12 13 14 16 16 18 20 22 023 24 29 Unpacking Check List The following items are included with the product Please retain all packaging materials until all expected items are accounted for and found to be operating Packet containing 4 off M6 mounting screws 4 off plastic washers Moulded IEC mains Te ne Protective foam Dual Mic Amp materials Compressor Limiter Quality Certificate Procedure Protective foam 3 fi I Remove all loose items from the User materials Guide packaging 2 Slide the unit along with the protective foam parts out of the box 3 Slide the protective foam parts away from the unit Specifications F
5. 18 INPUTS A COMPRESSOR A FILTERS B Filters Two attenuation slopes are provided for the High Pass variable frequency filter giving a choice of 18 or 24 dB Octave Similarly two attenuation slopes are provided for the variable frequency Low Pass filter with a choice of 12 or 18 dB Octave A steep filter at the low frequencies be extremely useful to remove building rumble or excessive low frequency ambience without affecting the musical spectrum At the high frequencies the 18 dB Octave slope can effectively remove interference or help shape the signal for digital recording but the 12 dB Octave slope is more useful as a shaping tool to adjust musical harmonic content Filters In Each filter can be switched in and out independently or together and are only active when their relevant switches are operated These switches operate irrespective of the audio path they are resident in Main Signal or Side Chain Side chain Switch Switches the High Pass and Low Pass filters into the side chain path Operational Guide Compressor Link The Compressor sections of two or more units may be linked via the Link A and Link B connections When connected identical gain reduction can take place across the connected units The applied gain reduction is derived from whichever path has the greatest signal The units are linked together using a mono or stereo 1 4 inch jack lead via the connector on the rear panel For more than two un
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7. can be used as a Direct output pre or post Filters Insert Send and Return are electronically balanced and can operate up to 26dBu 23 W NN Operational Guide CLOCK IN OUT COMP LINK CHANNEL A 1 rm 22 L POWER DIGITAL O P CHANNEL B Digital Output Option Clock In The Clock in jack is a standard 75 Ohm BNC connector that connects to an external sync source either Word Clock or Pro Tools Superclock Int Ext Welk Sclk Int Ext switches between internal or external sync modes When the unit is set to external the Welk Sclk switch can be used to switch between Word Clock or Pro Tools Superclock as the sync source Sampling Rates Internal sampling rates of 44 1kHz 48kHz 88 2kHz and 96kHz can be selected by the appropriate switches located on the rear panel Digital Output Leds The 44 1kHz 48kHz 88 2kHz and 96kHz Leds indicate which internal sampling rate has been selected The Lock Led when illuminated indicates a stable lock condition The External led when illuminated indicates an external sync source has been selected Important Safety Instructions Instructions de S curit Importances Avant de changer le fusible teindre l appareil et enlever la prise d alimentation Utiliser un tourne vis a t te plate appuyer sur le capuchon du fusible doucement vers l interieur et tourner dans le sens contaire des aiguilles d une montre pour d gager le capuchon M
8. Note Under no circumstances press the 48V switch if an unbalanced source is connected to the XLR Phase Switch The phase switch allows phase inversion of the selected input The switch should normally be released 13 3170 JO 18497 8 nding eI aun issau ja 5 wie U Jayu nus LIEN ULD 15 JW 18187 v ndno 89 29182 62 381 2900 02 ueg eur ULL OW u 4d U 215 a sayy 7 U dow 0 pue 7 Yur 2085910 9 amp sayur ULD ETS 29182 92 391 ul ad U ueg eur SH pues p vuejeg aie 9 Key ap99 0 apo quowngsuy Y U an v v 0 5 Q gt sanya pues p vuejeg lt 8 Key lt N aun lt ap99 01 apo YTL y an weungsu Y U eseyg aunt 7 U O Mi
9. carefully Please keep this information Frequency Response Unity Gain Gain Range Input Impedance Bridging Input Impedance Input Balance Unity gain 1kHz Overall Noise DIN Measured at the output 24 10Hz to 200kHz 3dB 12dB to 12dB gt 10 000 ohms 60dBu 102dBu Frequency Response Unity gain setting 150 ohm source Gain Range Equivalent Input Noise DIN Bandwidth 22Hz 22kHz Measurement with gain at 66dB Input terminated with 150 ohms Measured at unity gain Input terminated with 150 ohms Input Balance 1kHz Harmonic Distortion Unity gain setting Input Output level 20dBu THD measured 1kHz Maximum Input Level Unity gain Input Impedance Input Impedance 10Hz to 200kHz 3dB Unity to 66dB 109dBu 100dBu 60dBu 0 0007 26dBu gt 2M0 ohms A Cautions Hazards or unsafe practices which could result in severe personal injury or death Avis Dangers ou pratiques dangereuses pouvant r sulter en des blessures graves ou causant la mort Warnings Hazards or unsafe practices which could result in minor personal injury or product or property damage Avertissements Dangers ou pratiques dangereuses pouvant r sulter en blessures personnelles mineures l g res ou en dommages la propri t Notes Contain inportant information and useful tips on the operation of your equipment Notes Contiennent l information de inportan
10. e 2 2 Megohms The Compressor is an all analogue design which musically emulates the best of my past designs and includes a control of the knee shape ranging from HARD to a very gentle transition which have called MM and Much More the description a friend gave it 28 1 www 2002 Harman International Industries Ltd Notes All rights reserved Parts of the design of this product may be protected by worldwide patents AMEK is a trading division of Harman International Industries Ltd Information contained in this manual is subject to change without notice and does not represent a commitment on the part of the vendor AMEK shall not be liable for any loss or damage whatsoever arising from the use of information or any error contained in this manual or through any mis operation or fault in hardware or software contained in the product No part of this manual may be reproduced stored in a retrieval system transmitted in any form or by any means electronic electrical mechanical optical chemical including photocopying and recording for any purpose whatsoever without the express written permission of AMEK It is recommended that all maintenance and service on the product should be carried out by AMEK or its authorised agents AMEK cannot accept any liability whatsoever for any loss or damage caused by service maintenance or repair by unauthorised personnel PART MANDMCL Issue 2 Harman Inter
11. ettre le nouveau fusible dans le capuchon et remetre en place en faisant la proc dure inverse 100V 230V Operation Fonctionnement This apparatus does not require any operating voltage adjustment Cet appareil n exige pas l ajustement de tension qui op rant Servicing Services The servicing instructions in this manual are for use by qualified personnel only To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so Refer all servicing to qualified service personnel Les instructions de services contenues dans ce manuel sont pour utilisation seulement par des professionels Pour r duire le risque de choc lectrique ne tenez aucune op ration de service sauf celles contenues dans le manuel d op ration a moins d tre qualifi pour le faire R f rez toute r paration un agent de service professionel T AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR DO NOT OPEN NN ag WARNING For your own safety and to avoid invalidation of the warranty please read this section carefully Do not place the apparatus on an unstable surface Do not insert objects through any apertures Do not use this apparatus near water Unplug the unit before cleaning Clean only with a damp cloth Do not block any of the ventilation openings Install in accordance with the manufacturer s instructions Do not instal
12. ilters Compressor Cont High Pass Filter Frequency Range 3dB points Unity gain Slope Noise DIN Measured at the output unity gain Harmonic Distortion Input Output level at 20dBu THD measured 1kHz Low Pass Filter Frequency Range 3dB points Unity gain Slope Noise DIN Measured at the output unity gain Harmonic Distortion Input Output level at 20dBu THD measured 1kHz Compressor 20Hz to 300Hz 18 or 24dB per octave 99dBu Typically 0 0007 2 5kHz to 28 kHz 12 or 18dB per octave 98dBu Typically 0 0007 Distortion Setting as for Noise above Input signal 10dBu 1kHz Unity gain Compressor Key Insert Send Frequency Response Noise DIN Measured at the output gain unity Distortion Output signal 20dBu 1kHz Output Balance Unity gain 1kHz Maximum Output Level Unity gain Output Impedance 1kHz Compressor Key Insert Return Frequency Response Noise DIN Gain range Threshold range Ratio range Attack range Release range Frequency Response Unity gain Noise DIN Measured at the output gain unity Threshold OdBu 10dB to 24dB 40dB to 22dB 1 1 to 40 1 0 3ms to 300ms 0 1Sec to 10Sec 10Hz to 200kHz 3dBu 92dBu Measured at the output gain unity Distortion Output signal 20dBu 1kHz Output Balance Unity gain 1kHz Maximum Output Level Unity gain Output Impedance 1kHz 0 02
13. its create a daisy chain lead with all the tip contacts wired together and with all the sleeve contacts wired together the ring contact is not used See also section entitled Compressor Link for operation of this facility Signal Paths There are two audio signal paths within DMCL Chan A and Chan B The side chains are sourced from the relevant selected inputs Selecting Side Chain allows filter settings to be inserted into the Compressor side chain allowing gain reduction to be frequency dependent LF cut can be applied to the side chain to prevent a bass line pumping the overall signal level 11 W NN Operational Guide Operational Guide FILTERS A INPUTS B COMPRESSOR B a aT Level Meter Each path is equipped with its own level meter which can display the input or output levels as selected by the Meter amp O L Source switch 1 INPUTS A COMPRESSOR A FILTERS The meter is calibrated to read 0 for levels of 4dB Mic Input O L LEDs The microphone input circuit Mic Path Freq Response is a T LA Transformer Like 10 0 There are two overload LEDs monitoring signal levels on the DMCL All LEDs are set to illuminate 448 before clipping The O L LEDs are sourced from either post the input amplifiers or pre the output driver Amplifier It behaves like a transformer in that if a signal is applied to one input leg only no or very little output 0 0 is the result A common
14. l near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers or power supplies that produce heat Do not defeat the safety purpose of the polarised or grounding type plug A polarised plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wider blade or the third prong are provided for your safety When the plug provided does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Avoid using mains outlets on the same circuits as air control systems or other equipment that regularly switches on and off Only use attachments accessories specified by the manufacturer Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as the power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture the apparatus does not operate normally or the apparatus has been dropped Unplug the unit under these circumstances Adjust only those controls that are covered by the operating instructions Use only the mains
15. lead provided with the equipment Other leads may not have sufficient current rating Do not operate this unit with the cover removed Operational Guide Key The Key switch enables the compressor insert Compressor Link When enabled identical gain reduction can take place when two or more units are linked together The applied gain reduction is derived from whichever path has the greatest signal If you want identical compression using two or more units the controls on each separate unit have to be set up a similar manner If you wish to use amp MM in a link situation all the amp MM buttons have to be enabled on the other units involved in the link otherwise identical gain reduction will be lost Compressor A link switch when activated allows Compressor A to be linked to Compressor B This enables it for example to be used as a stereo pair ie track each other Compressor B link switch activates the Channel B link jack socket located on the rear panel to allow linking to other units Compressor A link jack socket is permanently active ready to receive a signal from another pure path unit Pre Filter The Compressors are normally post filter the PRE FLT switch allows the Compressors to be pre filters Gain Reduction Meter If the signal exceeds the compression threshold the amount of gain reduction is displayed 21 NN Operational Guide FILTERS A INPUTS B COMPRESSOR B
16. mode 22 input coil rejects common 40 mode signals and acts as a 6 0 Low Pass Filter for differential 8 0 inputs aoa 10 100 ik 10k 100k200k A high quality rotary switch provides a gain range from OdB unity to 66dB in 6dB steps Mic gain trim is continuously variable 12dB The mic input impedance is 5kO ohms thus producing extremely low loss from a 150 or 200 ohm microphone At unity gain the microphone amplifier can handle a balanced input signal of more than 26dBu without an attenuator pad this is a unique feature amongst microphone amplifiers it could therefore double as an additional high performance Line Input 12 Le Operational Guide FILTERS A INPUTS B COMPRESSOR B INPUTS A COMPRESSOR A FILTERS B Line Input Line Path Freq Response 10 0 The Line input is 10 0 ohm 8 0 bridging balanced and floating transformer design which provides uncompromising isolation and protection against ground currents and any unwanted signals 10 100 1k 10k 100k 200k Unlike traditional transformers the frequency response and distortion are independent of the source impedance of the preceding e
17. national Industries Ltd Langley House Third Avenue Trafford Park Manchester M17 1FG United Kingdom l Tel 44 0 161 868 2400 M E K Fax 44 0 161 873 8010 E mail amek amek com Web www amek com Channel Crosstalk Digital Output Specifications Unity gain path level 20dBu Unused inputs terminated with 150 ohm A B B A Main Output 120dBu 1kHz 100dBu 15kHz 120dBu 1kHz 100dBu 15kHz Maximum Output Level All digital measurements are made with a sine wave signal of 997Hz 48kHz internal sampling frequency unless otherwise stated OdB F S D 26dBu Frequency Response Unity gain sampling frequency frequency 48kHz 10Hz to 23kHz 3dBF Unity gain sampling frequency 2 10Hz to 45 2 Uni ain 26dBu yg Sampling Frequency Range Output Impedance Internal Sync 44 1kHz 48kHz 1kHz lt 100 ohms 88 2kHz 96kHz Harmonic Distortion External Sync 30kHz to 96kHz Input Output level at 20dBu Word Length 24Bit THD measured 1kHz 10k ohms load 0 0007 Dynamic Range 11208 600 ohms load 0 0007 te Harmonic Distortion Output Balance Input level at 20dBu 6dB F S D Unity gain 1kHz 40dBu THD measured 997Hz lt 0 001 Power Consumption Channel Status Analogue only version 20W max With digital option fitted 30W max The unit applies the following channel status settings 26 Professional Format Linear PCM No Emphasis
18. ng the fuse always switch off the unit and remove the AC power cable Using a flat blade screwdriver press the fuse cap inwards gently and twist anti clockwise to release the cap Fit the new fuse to the cap and replace it in the fuseholder by reversing the procedure Afin d viter un risque de feu remplacer seulement avec fusible de la m me valeur et type tel qu indiqu sur l appareil 100 230V T Les fusibles sont de type IEC 20mm protection surtension pour fusibles Operational Guide Word Clock Output The Word Clock output jack is a standard 75 Ohm BNC type connector that outputs word clock for slaving and synchronising other units Digital Outputs The Digital signal is simultaneously applied to the three output connectors providing the following formats Phono S PDIF The Sony Philips Digital Interface Format Opto TOSLINK XLR AES 3 Note The channel status settings in the AES data stream ALWAYS follow the switch setting of the unit even if the unit is synced to an external source Key Insert Option Internal switch The Key Insert internal option switches S37 CHA S38 CHB allows the Compressor Key inserts to be used as Main signal path inserts when selected In the Insert mode the insert point is always pre compressor The PRE FLT switch moves the insert with the compressor pre or post Filters The KEY switch acts as the insert in out switch The Insert Send is always active and
19. onnectors Inserts The Send is electronically balanced via 14 jack This is half normalled to the compressor return The return is electronically balanced via a 1 4 inch jack The inserts also allow you to input an external device into the compressor side chain Wiring Conventions The audio connectors are wired as follows XLR Pin 1 Screen Pin 2 Hot Pin 3 Cold 14 Jack Sleeve Screen Tip Hot Ring Cold High Pass The High Pass filter operates over a frequency range of 20Hz to 300Hz with a switchable slope of 18dB or 24dB Octave allowing the removal of unwanted low frequency noise components such as rumble and hum Low Pass The Low Pass filter operates over a frequency range of 2 5kHz to 28kHz with a switchable slope of 12dB or 18dB Octave The extended range allows the filter to remove unwanted harmonic distortion in the conventional audio band caused by audio components in the inaudible upper frequency bands 20 0 30 0 40 0 High Pass Filters Response 10 100 ik 10k 100k Low Pass Filters Response 10 0 0 0 100 ik 10k 100k 19 ww Wa NNN Operational Guide FILTERS A INPUTS B COMPRESSOR B
20. quipment Full low frequency performance is maintained even with input levels higher than 20dBu Gain is provided on a variable control covering a 12dB range The Line Input features a new high performance transformer with exceptional low frequency performance as with any genuine transformer input this Line Input may be used with either balanced or unbalanced sources without having to allow for change of gain due to grounding one leg of a so called electronically balanced circuit 16 Operational Guide Instrument Input The Instrument input is a secondary input to the Mic amp It utilises a high impedance input amplifier 2 2 Megohms The Mic rotary gain and Mic trim provide gain control over the Instrument input The gain range remains the same as the Mic input To activate the Instrument input the Mic input and the si Instrument buttons have to be selected Instrument Input Freq Response 6 0 4 0 Note The LINE button overrides the Mic or Instrument inputs The Instrument input is protected from the 48V and 10 0 can be used balanced or unbalanced 10 100 ik 10k 100k200k Keep the instrument lead short to avoid high frequency loss especially with high impedance guitar pickups Phantom Power The 48V switch applies 48V phantom power to the Mic input XLR
21. t et les pointes utiles sur l op ration de votre quipement Earthing Terre This apparatus MUST be earthed Under no circumstances should the mains earth be disconnected from the mains lead Cet appareil DOIT tre mis a la terre La mise a terre ne doit pas tre d branch e du terminal principal sous acune circonstance NNN Important Safety Instructions Instructions de S curit Importances Mains Cable Cable de Secteur The supplied IEC mains cable must be terminated correctly to the AC mains supply before use Use only an approved AC plug or power distribution device The Green Yellow core in the mains cable is a safety ground and must be connected at all times The three cores are colour coded as follows Safety Earth Green Yellow Green Yellow USA Live Brown White USA Neutral Blue Black USA Le cable de secteur IEC fourni doit tre correctement au cable d alimentation avant l utilisation Utiliser seulement une prise de courant conforme Le cable vert jaune l int rieur du cable d alimentation est la s curit terre et doit tre toujours connect Les 3 cables l int rieur du cable d alimentation sont de couleurs suivantes Prise de Terre Vert Jaune Vert Jaune USA Phase Marron Blane USA Neutre Bleu Noire USA Changing the Fuse Changer le Fusible To avoid the risk of fire replace only with same value and type of fuse as marked on the unit Before changi
22. yer is under surface printed to provide a robust hard wearing surface designed to last the life of the product in virtually any operating environment It is recommended that additional rear or side supports are used in conjunction with the facia panel fixings particularly when the unit is mounted in a flight case or vehicle where vibration and transit shocks can be expected Powering up and Clicks Clicks may be heard from in out switches when the product is powered up these will dissipate after approximately 10 minutes This is perfectly normal Cleaning Unplug the unit before cleaning The product should be cleaned with a soft brush around the controls If the facia becomes dirty use a damp cloth with a little household soap to remove the dirt DO NOT use solvent cleaners under any circumstances or the facia may be permanently damaged and warranty invalidated Connections Operational Guide CLOCK IN OUT COMP LINK CHANNEL A 1 rm L L POWER DIGITAL O P CHANNEL B Audio Connections Inputs The Mic input is electronically balanced via a standard 3 pin female XLR connector and employs Rupert Neve s TLA transformer like amplifier The Line input uses a transformer balanced arrangement via a female XLR The Instrument input is electronically balanced via a standard 1 4 inch Jack Socket located on the front panel Outputs The outputs are transformer balanced via standard 3 pin XLR male c
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