Presonus Audio electronic DigiMAX LT User's Manual
Contents
1. UE TIP Send Tip RING Return SLEEVE GND 3 OPERATIONS 3 1 DYNAMIC MICROPHONES Dynamic microphones are characterized by lower output levels Hence more gain is needed to amplify a dynamic microphone to operating level Occasionally it is necessary to add the 20dB pad to the microphone to avoid distortion e g when recording percussion Do not use phantom power when using dynamic microphones 3 2 PHANTOM POWERED MICROPHONES Phantom powered microphones such as condenser and some ribbon micro phones require external power to preamplify the microphone acoustic pickup These microphones typically have much higher output than dynamic micro phones Hence the 20dB pad is almost always necessary when close micing to avoid clipping the amplifier 3 3 LINE LEVEL INPUTS The inputs on the DigiMAX LT are designed for use with line level or low impedance inputs not instrument level inputs These inputs will work for line level devices such as keyboards samplers drum machines CD players etc 3 4 APPLICATION GUIDE Outboard Dynamics Processing Example The DigiMAX LT has an insert on every channel that allows you to insert your own dynamics processor such as a compressor EQ limiter or etc To do this all you need is your dynamics processor and a TRS insert cable This cable is Y shaped has a single TRS 1 4 jack on one end and two 1 4 TS jacks on the other end The single end will look like a stereo2. be able to pass a signal through to the adat lightpipe output The reason for this is that a signal is sent to a piece of outboard gear from the insert jack and then returned to the insert after being processed So in other words you are breaking the signal chain by using the send and not the return Using The DigiMAX LT As A Front End For Digital Recording Systems The DigiMAX LT is the perfect front end for a digital recording system The pre amps on the unit allow you to boost the signal going to your recorder without adding extra unwanted noise All digital recorders require that word clock be transmitted with a digital audio signal to ensure sample accuracy and syn chronization Word clock scans incoming information and automatically synchs to the necessary sample rate In other words word clock ensures that the recorder and the sending device in this case the DigiMAX LT send and receive digital audio at the same rate If there is no word clock synch then you will hear pops clicks or weird digital dropout noise Word clock can either be transmit ted through the lightpipe cable fiber optic or by BNC cable If the DigiMAX LT is the master sending word clock out to the recorder then there are two possible connection scenarios Both cases require that the EXT CLOCK button on the front of the unit be depressed not pushed in and that the appropriate sample rate be selected by using the SAMPLE RATE button on the front of the un
3. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase This warranty is enforceable only by the original retail purchaser To be protected by this warranty the purchaser must complete and return the enclosed warranty card within 14 days of purchase During the warranty period PreSonus shall at its sole and absolute option to either repair or replace free of charge any product that proves to be defective on inspection by PreSonus or its authorized service representative To obtain warranty service the purchaser must first call or write PreSonus at the address and telephone number printed below to obtain a Return Authorization Number and instructions of where to return the unit for service All inquiries must be accompanied by a description of the problem All authorized returns must be sent to the PreSonus repair facility postage prepaid insured and properly packaged PreSonus reserves the right to update any unit returned for repair PreSonus reserves the right to change or improve the design of the product at any time without prior notice This warranty does not cover claims for damage due to abuse neglect alteration or attempted repair by unauthorized personnel and is limited to failures arising during normal use that are due to defects in material or workman ship in the product Any implied warranties including implied warranties of merchantability and fitne
4. 1 4 connector jack This end of the cable plugs into the insert jack on the back of the DigiMAX LT The other ends of the cable plug into the input and output of the outboard unit If the outboard unit does not work immediately you may want to try swapping the jacks that are plugged into the input and output of the outboard unit Insert Jacks As Analog Outputs Example 1 You may have noticed by now that the DigiMAX LT does not have a standard analog output In the event that you want to have analog outputs as well as the lightpipe output you can use the inserts as analog outputs To do this all you need is a TS cable Plug the cable in until you feel OPERATIONS 3 it click once The cable will appear to be half plugged in Using the insert in this fashion will not break the signal chain and will allow the lightpipe output to function correctly Insert Jack As Analog Outputs Example 2 In the event that you do not need the lightpipe output you can use the inserts as analog outputs To do this all you need is a TRS insert cable This cable is Y shaped has a single TRS 1 4 jack on one end and two 1 4 TS jacks on the other end The single end will look like a stereo 1 4 connector This end of the cable plugs into the insert jack above the input on the back of the DigiMAX LT You would use the SEND end of the cable as the output cable By using the insert as an analog output with an insert cable you will not
5. DigiMAX LT Eight Channel Mic Preamplifier with adat Lightpipe Output USER S MANUAL 1 0 9 000600 0000 S Copyright 2002 PreSonus Audio Electronics Inc ALL RIGHTS RESERVED 1 1 1 2 2 1 2 2 3 1 3 2 3 3 3 4 TABLE OF CONTENTS OVGRVICW HT aa naa a eaaa aE ai aR 1 Introduction iiis oenruk niaaa naaa a aE EEN 1 Features eM 2 Controls amp Connections socie aE 3 Front Pan GSlisciscscesesscetdassbontunennnisadies eannan a aA iA uniia 3 Back Panel e 5 Operations annn ES 6 Dy namie MICKOPHONES icccssnspcktanssanienesesarinatnethmaddeeabharanachencno dad E 6 Pharitom Powered MICS ws stscccccceresasaces crssanswsabescea eter sceaaccierenanaaaednes 6 Line Level InpUtsisusoioonuteescosnk dete s setut kie aE nppE t INED UAE DPI EE 6 Application GUlde cede seat repetam nir area eee etx ne iain 6 Technicial Specifications eeeeeeeeei eene nnne 10 PreSonus Limited Warranties esee 12 OVERVIEW 1 1 1 INTRODUCTION Thank you for purchasing the PreSonus DigiMAX LT Eight Channel Mic Preampli fier with adat Lightpipe Output This preamp was designed using state of the art components to deliver crystal clear audio for an indefinite period of time We believe the DigiMAX LT to be an exceptional sounding unit and an exceptional value Please contact us at 1 800 750 0323 with
6. ator greater control over the incoming signal and a much reduced chance of over driving the input thereby avoiding distortion Neutrik Combo Connectors Each channel of the DigiMAX LT has a mic line connector using the Neutrik combo connector This revolutionary style connector lets you use either 1 4 or XLR connectors in the same input Sample Rate Selector The DigiMAX LT has a switch on the front panel that lets the operator choose the sample rate It provides selectable rates of 32k 44 1k and 48k Ext Clock When the External clock switch is engaged the DigiMAX LT goes into chase mode and automatically recognizes which of the three sampling rates is required for optimum synchronization Digital Optical Output The DigiMAX LT has an adat lightpipe output that can be used with any com mercially available digital optical cable This cable can supply eight simultaneous outputs 2 CONTROLS AND CONNECTIONS 2 2 1 FRONT PANEL Notice that the front panel is divided into eight preamplifier sections sample rate selector with indicators and external clock switch 48V amp A switch labeled 48V is located next to each gain knob This switch may be engaged to provide phantom power for condensor mics and any other device which may require phantom power by way of the XLR input This power is supplied at a constant rate to allow use of all eight inputs simultaneously without any degra
7. been advised of this possibility this limited warranty does not cover any such consequential or incidental damages Some states or countries do not allow the limitations or exclusion of incidental or consequential damages so the above limitation may not apply to you Any and all warranties express or implied arising by law course of dealing course of performance usage of trade or otherwise including but not limited to implied warran ties of merchantability and fitness for a particular purpose are limited to a period of one year from either the date of original retail purchase or in the event no proof of purchase date is available the date of manufacture Some states or countries do not allow limitations on how long an implied warranty last so the above limitations may not apply to you This limited warranty gives you specific legal rights and you may also have other rights which vary from state to state country to country PreSonus Audio Electronics Inc 7257 Florida St Baton Rouge LA 70806 225 216 7887 Copyright 2002 PreSonus Audio Electronics Incorporated All rights reserved 13
8. dation of audio quality Pin 1 GND Pin 2 48V Pin 3 48V Gain Control This knob provides 44dB of gain to the processed signal The amplifier has inherent gain of 10dB thus delivering a total gain possibility of 54dB 20dB Pad A 20dB pad is available on each channel of the DigiMAX LT for reducing incoming signal levels Using this pad can provide a more manageable signal from high output devices giving the operator greater control over the incoming signal and a much reduced chance of over driving the input thereby avoiding distortion The pad is available only for the XLR input on each channel The pad does not work for the line level inputs Channel LEDs The three LEDs found on each channel are provided to serve different functions 20dBu The LED farthest to the left is labeled 20 and serves to monitor whether or not signal is present at the channel output 10dBu The LED in the middle is labeled 10 and indicates a signal level of 10dBU CONTROLS amp CONNECTIONS 2 Clip The LED labeled CLIP indicates at a signal level of 22dB Care should be taken to avoid using signal levels that cause this LED to become active Signal levels that reach or exceed this amount of output will cause undesirable artifacts distortion in the channel output signal that is being indicated by this LED The signal level is reduced by rotating the channel s control counter clockwise Sample Rate Selector The section at t
9. hain after the preamp This would allow you to digitize a signal such as a keyboard or CD player without passing through the DigiMAX LT preamp The DigiMAX LT is not designed for direct use with record players An RIAA Recording Industry of America Association phono preamplifier would have to be inserted in between the record player and the DigiMAX LT If this RIAA phono preamplifier is not used then you would not hear an accurate representation of the recording The DigiMAX LT is designed for use with line level or low impedance inputs NOT instrument level inputs The 1 4 inputs on the DigiMAX LT are lower imped ance than our typical instrument inputs In other words if you were to plug a guitar into the DigiMAX LT directly you probably wouldn t hear anything Use of an impedance matching direct box will provide the correct impedance for instru ments ex guitar bass etc However you can plug microphones dynamic or condenser keyboards samplers drum machines CD Players and etc into the DIGIMAX LT OPERATIONS 3 4 TECHNICAL SPECIFICATIONS Number of Channels 1 sadari Y e Ra ag Y kei a a d i axua XY Raga 8 Input Input Impedance XLR Input s eoxiee sea beca tension iaaa 1 3k Q Input impedance Line Level Input iiec itera a 10k Q CORDGCLOES sasesana ainoo aoa n araa Neutrik Combo Panel Controls CL OdB to 40dB pM TE 20dB Phantom POWOIzieicecesesesisa aves FiRQIe UNE UUU E a 48V Meters Signal Prese
10. he extreme right of the front panel contains the sample rate selector switch with LED indicators provided for 32k 44 1k and 48k This section also contains a switch labeled EXT CLOCK When this switch is engaged the operating clock rate of 32k 44 1 or 48k will be determined by the incom ing signal from an external device through the word clock in input on the back panel of the DigiMAX LT CONTROLS amp CONNECTIONS 2 2 2 BACK PANEL BASIC LAYOUT Digital Optical Output An adat optical output lightpipe is provided on the rear panel of the DigiMAX LT Eight simultaneous 24bit outputs are possible when using the optical out Word Clock Out In The word clock output and input are accessed through separate BNC con nectors The internal sample rate can be set to send 32k 44 1k or 48k The word clock in scans the incoming information and automatically synchs to the necessary sample rate Insert Each channel of the DigiMAX LT has an insert that sends and returns the signal from the associated channel This insert can be very useful for dynamics processing such as compressing limiting etc or for monitoring purposes by helping in overcoming the time discrepancy that may be encountered in some digital recording situations For more detailed instructions on uses and wiring of the inserts please see the application guide at the end of the manual This insert is wired as follows
11. it The first case in which the DigiMAX LT is the master would require that the word clock output of the DigiMAX LT be connected to the word clock input of the recorder by BNC cable The second case in which the DigiMAX LT is the master would require that the recorder receive word clock from the adat lightpipe fiber optic cable This second scenario requires that the digital recorder be set to receive word clock via lightpipe This is often done by either hitting a button 3 OPERATIONS on the recorder that says external clock or by setting a drop down menu option to receive sync from an external source or lightpipe In the event that you want to slave the DigiMAX LT to another device you would need to do two things First press the EXT CLOCK button on the front of the unit Second you would hook a BNC cable from the word clock output of the sending device to the word clock input on the back of the DigiMAX LT Bypassing The DigiMAX LT Preamps The DigiMAX LT can be used as an analog to digital converter The setup for this application requires a TRS insert cable This cable is Y shaped has a single TRS 1 4 jack on one end and two 1 4 TS jacks on the other end The single end will look like a stereo 1 4 connector This end of the cable plugs into the insert jack on the back of the DigiMAX LT You would use the return end of the cable as the input cable By plugging a device into the return cable you would be entering the signal c
12. nt LED taastaperaiatsacdss nipan aaan n 20dBu Signal Leve LED isrann A RON NB UU RUE 10dBu ie Bp een a A E a a EUNE 22dBu Output adat Lightpipe Digital Optical oett ette nenn n Ree en nenatis 24bit Insert TRS Send Unbalanced essri aaea EEn ER ERA AUDI 51 Ohms RetuirniCUnbalanCe mt EE 10 Ohms Digital Sampling Rate Seega honp nsns horuxnnbuV sino tue NER 32kHz 44 1kHz 48kHz Performance HeadtOOn TEILS DIL LLL 22dBu Freg RESPONSE sarrin ane ii 20Hz 50k Hz 5dB TAD Noise Unwelghited sinnani E R carne lt 0 009 Afer i Mgfopg EMEN 94dBu Signal t NOISG wise ded cee D E gt 98dB Analog Dynamic Range ao retine udao nian PME P Ro ADR USE nds gt 120dB Power Supply ReJectior spbrs a ent osse eutuitaE E KE UEUE DH CK MEI MEE gt 98dB Amplifier Pesinden ri a NEA EN O Dual Servo Power Supply TECHNICAL SPECIFICATIONS 4 Mpera TENTE 100 120 220 240VAC Factory Configured olg TEE 80 Watts Physical Kl E 1U Rack DIMENSIONS sesin niana a an ENEE 19 X 1 75 X 9 WeigliE acsessuctsecut neuen a Editi A NEQUE URDU d a rd 15 Ibs SILLCIP Ania Steel Uca E E a ENNE E Raai Aluminum As a commitment to constant improvement PreSonus reserves the right to change any specification stated herein at any time in the future without prior notification 11 5 PRESONUS LIMITED WARRANTY IN THE UNITED STATES PreSonus Audio Electronics Inc
13. s limited warranty shall be that which is described to the original retail purchaser by the authorized PreSonus dealer or distributor at the time of purchase PreSonus does not however warrant its products against any and all defects 1 arising Out of materials or workmanship not provided or furnished by PreSonus or 2 resulting from abnormal use of the product or use in violation of instructions or 3 in products repaired or serviced by other than authorized PreSonus repair facilities or 4 in products with removed or defaced serial numbers or 5 in components or parts or products expressly warranted by another manufacturer PreSo nus agrees through the applicable authorized distributor in the country of original retail purchase to repair or replace defects covered by this limited warranty with parts or prod ucts of original or improved design at its option in each respect if the defective product is shipped prior to the end of the warranty period to the designated authorized PreSonus warranty repair facility in the country where purchased or to the PreSonus factory in the U S in the original packaging or a replacement supplied by PreSonus with all transporta tion cost and full insurance paid each way by the purchaser or owner All remedies and the measure of damages are limited to the above services It is possible that economic loss or injury to person or property may result from the failure of the product However even if PreSonus has
14. ss for a particular purpose are limited in duration to the length of this limited warranty Some states do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you In no event will PreSonus be liable for incidental consequential or other damages resulting from the breach of any express or implied warranty including among other things damage to property damage based on inconvenience or on loss of use of the product and to the extent permitted by law damages for personal injury Some states do not allow the exclusion of limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary form state to state This warranty only applies to products sold and used in the United States of America For warranty information in all other countries please refer to your local distributor PreSonus Audio Electronics Inc 7257 Florida Blvd Baton Rouge LA 70806 225 216 7887 Copyright 2002 PreSonus Audio Electronics Incorporated All rights reserved 12 PRESONUS LIMITED WARRANTY 5 OUTSIDE OF THE UNITED STATES PreSonus Audio Electronics products are warranted only in the country where originally purchased through the authorized PreSonus distributor in the country of original purchase against defects in material and workmanship The specific period of thi
15. your questions or comments regard ing this product PreSonus Audio Electronics Inc is committed to constant product improvement and believes the best way to accomplish this task is by listening to the experts on our gear our valued customers We appreciate the support you have shown us through the purchase of this product Please pay close attention to how you connect your DigiMAX LT to your system Improper grounding is the most common cause of noise problems found in studio or live sound systems We urge you to scan this manual before hooking up your DigiMAX LT to familiarize yourself with its features and applications Good luck and enjoy your DigiMAX LT 1 OVERVIEW 1 2 FEATURES Dual Servo Mic Preamps Each channel of your DigiMAX LT provides ultra low noise and wide gain control allowing the user to boost a desirable signal without increasing unwanted background noise 48V Phantom Power Each channel of the DigiMAX LT has 48V of phantom power available When the phantom power switch is engaged power is supplied at a constant rate This assures optimum performance of your condenser microphone s and that it will be free of distortion associated with insufficient power This switch is located on the front panel next to each gain knob 20dB Pad A 20dB pad is available on each channel of the DigiMAX LT for reducing incoming signal levels Using this pad can provide a more manageable signal from high output devices giving the oper
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