VocoPro DA-3700 Stereo Amplifier User Manual
Contents
1. 2 7447 THE SINGERS ULTIMATE CHOICE DA 3 700 DA 3700PRO__ KARAOKE MIXING AMPLIFIER WITH KEY CONTROL 5 9 GEE MUSIC MASTER VOLUME VOLUME ES UA ES 7 S m AN SN Digital Karaoke Mixing Amplifier with Key Control OWNER S MANUAL Table of contents Introduction Safety Instructions FCC Information Welcome Listening for a Lifetime Specifications and Features Getting Connected CD DVD player connection TV Display device connection Amplifier mixer and external sound system connections External speaker connection Mic s connection Effects Loop connections Controls and Functions Front Panel Hear Panel Hemote Control Basic and Advanced Operations Troubleshooting Safety Instructions CAUTION RISK OF SHOCK CAUTION To reduce the risk of electric shock do not remove cover or back No user serviceable parts inside Only refer servicing to qualified service personnel Explanation of Graphical Symbols The lightning flash amp arrowhead symbol within an equilateral triangle is intended to alert you to the presence of danger The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and servicing instructions WARNING To reduce the risk of fire or electric shock do not expose this unit to rain or moisture2. 1 Read Instructions All the safety and operating instructions should be read before the appliance is operated 2 Retain Instructions The safety and operating instructions should be retained for future reference 3 Heed Warnings All warnings on the appliance and in the operating instructions should be adhered to 4 Follow Instructions All operating and use instructions should be followed 5 Attachments Do not use attachments not recommended by the product manufacturer as they may cause hazards 6 Water and Moisture Do not use this unit near water For example near a bathtub or in a wet basement and the like 7 Carts and Stands The appliance should be used only with a cart or stand that is recommended by the manufacturer 7 An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause an overturn 8 Ventilation The appliance should be situated so its location does not interfere with its proper ventilation For example the appliance should not be situated on a bed sofa rug or similar surface that may block the ventilation slots 9 Heat The appliance should be situated away from heat sources such as radiators heat registers Stoves or other appliances including amplifiers that produce heat 10 Power Sources The appliance should be connected to a power supply only of the type described in the operating instructions or as m
3. DVD channels Turn clockwise to increase MUSIC VOLUME and counter clockwise to decrease the MUSIC VOLUME MUSIC BALANCE control Use this control to fade the music output between the left and right channels When the balance control is directly centered equal sound comes out of both the left and right channels giving you perfect stereo sound MUSIC LOW control This control increases decreases the amount of LOW bass frequency response applied to the audio output of INPUT SOURCES connected to the CD DVD channels Turn clockwise to increase the LOW frequency response and counter clockwise to decrease the LOW frequency response MUSIC MID control This control increases decreases the amount of MID RANGE frequency response applied to the audio output of INPUT SOURCES connected to the CD DVD channels Turn clockwise to increase the MID RANGE frequency response and counter clockwise to decrease the MID RANGE frequency response MUSIC HIGH control This control increases decreases the amount of HIGH frequency response applied to the audio output of INPUT SOURCES connected to the CD DVD channels Turn clockwise to increase the HIGH frequency response and counter clockwise to decrease the HIGH frequency response MIC MASTER VOLUME control Use this to control the overall volume of both microphone channels Turn clockwise to increase the master microphone volume and counter clockwise to decrease the master microphone volume MUSIC MASTER
4. OUTPUT from these jacks is dry Echo effects will not be applied to this MIC OUTPUT regardless of the current master and channel echo settings REC OUTPUT jacks These jacks provide connection to recording and other external audio devices Connect a paired RCA ended patch cable from these jacks to appropriate INPUT jacks on the recording or other audio video device LINE OUTPUT jacks These jacks output both mic channels and source music together AUDIO INPUT jacks Input audio from a VCD CD or DVD player into either of these channels The audio from channel A can only be heard when channel A is selected on the DA 3700PRO s input selector and the audio from channel B can only be heard when channel B is selected on the DA 3700PRO s input selector EFFECTS LOOP jacks Use the EFFECTS LOOP jacks to connect an external effects unit such as a key controller or EG After removing the LOOP BARS connect a patch cable from the OUTPUT jacks of your external effects unit to the EFFECT LOOP IN jacks Connect a second patch cable from the INPUT jacks of your external effects unit to the EFFECT LOOP OUT jacks on the DA 3700PRO NOTE Do not discard the loop bars It is necessary for the loop bars to be in place when there is no external effects unit being used 11 Hemote control description MIC MASTER VOLUME MUSIC VOL w NIH ABI T FF DA 3700PRO INPUT SELECTOR buttons Use these buttons to toggle between the two available input cha
5. be deceiving Over time your hearing comfort level adapts to a higher volume of sound So what sounds normal can actually be loud and harmful to your hearing Guard against this by setting your equipment at a safe level BEFORE your hearing adapts To establish a safe level e Start your volume control at a low setting e Slowly increase the sound until you can hear it comfortably and clearly and without distortion Once you have established a comfortable sound level Set the dial and leave it there e Pay attention to the different levels in various recordings Taking a minute to do this now will help to prevent hearing damage or loss in the future After all we want you listening for a lifetime Used wisely your new sound equipment will provide a lifetime of fun and enjoyment Since hearing damage from loud noise is often undetectable until it is too late this manufacturer and the Electronic Industries Association s Consumer Electronics Group recommend you avoid prolonged exposure to excessive noise This list of sound levels is included for your protection Some common decibel ranges Level Example 30 Quiet library Soft whispers 40 Living room Refrigerator Bedroom away from traffic 50 Light traffic Normal Conversation 60 Air Conditioner at 20 ft Sewing machine 70 Vacuum cleaner Hair dryer Noisy Restaurant 80 Average city traffic Garbage disposals Alarm clock at 2 ft The following noises can be dangerous
6. stereo sound ECHO control This control increases decreases the amount of ECHO applied to the MIC channels Turn clockwise to increase ECHO and counter clockwise to decrease ECHO LOW control This control increases decreases the amount of LOW bass frequency response applied to the MIC channels Turn clockwise to increase the LOW frequency response and counter clockwise to decrease the LOW frequency response MID control This control increases decreases the amount of MID RANGE frequency response applied to the MIC channels Turn clockwise to increase the MID RANGE frequency response and counter clockwise to decrease the MID RANGE frequency response HIGH control This control increases decreases the amount of HIGH treble frequency response applied to the MIC channels Turn clockwise to increase the HIGH frequency response and counter clockwise to decrease the HIGH frequency response DIGITAL KEY CONTROL Use these buttons to raise or lower the musical key of your source music CD DVD player The LEDs indicate where the current key of the music is b Lowers the key of the music H Restores the music back to its original natural key Haises the key of the music 23 INPUT SELECTOR buttons Use these buttons to toggle between the two available input channels A and B Front panel description cont 2 6 2 S VH yw 2 ST MO Stereo Mono Use this button to switch between the two echo output modes S
7. 0 678 5348 TEL 909 593 8893 FAX 909 593 8890 VocoPro Company Email Directory Customer Service amp General Information Tech Support info 2 vocopro com techsupport vocopro com Remember Our Website Be sure to visit the VocoPro website www vocopro com for the latest information on new products packages and promos And while you re there don t forget to check out our Club VocoPro for Karaoke news and events chat rooms club directories and even a Service directory We look forward to hearing you sound like a PRO with VocoPro your ultimate choice in Karaoke entertainment FOR YOUR RECORDS Please record the model number and serial number below for easy reference in case of loss or theft These numbers are located on the rear panel of the unit Space is also provided for other relevant information Model Number Serial Number Date of Purchase Place of Purchase Listening for a lifetime Selecting fine audio equipment such as the unit you ve just purchased is only the start of your musical enjoyment Now it s time to consider how you can maximize the fun and excitement your equipment offers VocoPro and the Electronic Industries Associations Consumer Electronics Group want you to get the most out of your equipment by playing it at a safe level One that lets the sound come through loud and clear without annoying blaring or distortion and most importantly without affecting your sensitive hearing Sound can
8. 0PRO s remote or on the front panel 9 E aaa QQ Q O EI Q DUTI NPU Getting connected cont Amplifier mixer and external sound system connections Music and Vocals The DA 3700PRO s LINE OUT RGA jacks can be used to connect to a second power amplifier an external sound system or mixing device Note The DA 3700 offers optimum performance when used as an amp for home sound systems and smaller performance systems and speakers See our VP Series power amplifiers for more professional applications at VocoPro com or your nearest VocoPro dealer Use L R RCA audio cables to connect to an amplifier mixer or other external sound system Connect from the L R LINE OUTPUT on the DA 3700PRO to the L R audio input on your amp mixer or sound system Outputting Vocals Independently You can output vocals independently from the DA 3700PRO into a mixer from the L R RCA MIC Outputs Connect the L R RCA cable from the MIC OUTPUT to an Audio Input on your mixer Mixer amp MIC IN MIC 1 We 00009 85 INPUT External speaker connection You can connect directly to speakers using either MDP banana plug speaker cables or standard speaker wires Be sure to correctly match the polarities Connect speakers rated no lower than 4 Ohms to the DA 3700 Pro Please do not try to connect more than one speaker per channel as the load may exceed the amplifiers handling capacity causing it to overload If using standard speaker wire unscr
9. TEREO MONO MASTER ECHO VOLUME control This control increases decreases the MASTER VOLUME LEVEL of the ECHO effect available to the MIC 1 2 3 channels Turn clockwise to increase MASTER ECHO VOLUME and counter clockwise to decrease the MASTER ECHO VOLUME ECHO LO control This control increases decreases the amount of LOW frequency response applied during the ECHO effect application Turn clockwise to increase the LOW frequency response and counter clockwise to decrease the LOW frequency response control This control increases decreases the amount of HIGH frequency response applied during the ECHO effect application Turn clockwise to increase the HIGH frequency response and counter clockwise to decrease the HIGH frequency response ECHO control REPEAT adjusts the interval repetition of the echo effect As more REPEAT is applied to the ECHO effect more echo intervals will occur prior to fading out Turn clockwise to increase the REPEAT level and counter clockwise to decrease the REPEAT level ECHO DEL control DELAY adjusts the total beginning and ending length of each echo interval As more DELAY is applied to the ECHO effect each ECHO interval will become longer in time Turn clockwise to increase the DELAY level and counter clock wise to decrease the DELAY level MUSIC VOL control This control increases decreases the MUSIC VOLUME level s from INPUT SOURCES that are connect ed to the CD
10. TROL cable Remote Key Control allows you to make key changes at a distance from the Digital Key Controller on the DA 3700PRO VOLUME RESET switch The master MIC and MISIC volumes on the DA 3700 are programmed to reset back to zero every time the machine s power is turned off The VOLUME RESET switch allows you to turn this feature off When this switch is in the ON position the volume will reset whenever the machine is turned off and when in the OFF position the volume will stay the same when the machine is turned off MIC INSERT jacks These 1 4 jacks allow you to loop each microphone line through an effects unit NOTE In order to do this you will need a 1 4 Y cable not included See Connecting to an effects system using the Effects Loop instructions in the GETTING CONNECTED section of this manual for further instructions on running vocals through an effects loop VIDEO INPUT RCA jacks Connect RCA ended video cables from these jacks to the VIDEO OUT jacks on the device connected to your VCD CD Input or DVD Input B player VIDEO OUTPUT RCA jacks Connect RCA ended video cables from these jacks to the VIDEO IN on a TV or display device These are not independent outputs they both output the same video signal simultaneously MIC OUTPUT jacks These jacks output the two mic channels without any music Connect a paired RCA ended patch cable from these jacks to the appropriate INPUT jacks on a mixer or vocal effects unit NOTE MIC
11. VOLUME control Use this to control the overall volume of the music from the CD DVD player that is input into the DA 3700PRO POWER button This button turns the DA 3700PRO ON and OFF Hear panel description 20669 LELER 500000 SES AUDIO LL OUTPUT VOLTAGE SELECTOR switch This selector toggles between 110 120V 220 240V power settings NOTE Please ensure this toggle is set to the correct position matching the receiving AC outlets power supply before plugging it in an operating it Doing so may cause severe damage to the unit and void your product warranty FUSE terminal This terminal houses the DA 37O00PRO s main system FUSE NOTE If fuse replacement is necessary only replace with the same type and rating of fuse terminal Connect AC MAINS POWER CORD from the wall outlet to this terminal SPEAKER BINDING posts MDP Connect appropriate speaker cables from these SPEAKER OUTPUT jacks to the INPUT jacks located on your speakers Standard speaker wire or speaker cables equipped with MDP banana plugs can be used with the DA 3800 Pro s SPEAKER BINDING posts NOTE To use standard speaker wire unscrew the plastic color coded red black binds until you can access the wire holes located on the inner sides of the binds and slide the wire leads into them Fasten them down by re tightening the binds REMOTE KEY CONTROL This 1 8 jack is for connecting a REMOTE KEY CON
12. age pull out the power cord and remove the antenna cable during an electrical storm 11 The general digital signals may interfere with other equipment such as tuners or receivers Move the system farther away from such equipment if interference is observed NOTE Please check the copyright laws in your country before recording from records compact discs radio etc Recording of copyrighted material may infringe copyright laws Voltage Selector General Model Only Be sure to position the voltage selector to match the voltage of your local power lines before installing the unit 240V E 120V MALUM S ULTIMATE CHOICE OF KARAOKE ENTERTAINMENT 9 Welcome And Thank you for purchasing the DA 3700 from VocoPro your ultimate choice in Karaoke entertainment With years of experience in the music entertainment business VocoPro is a leading manufacturer of Karaoke equipment and has been providing patrons of bars churches schools clubs and individual consumers the opportunity to sound like a star with full scale club models in home systems and mobile units All our products offer solid performance and sound reliability and to further strengthen our commitment to customer satisfaction we have customer service and technical support professionals ready to assist you with your needs We have provided some contact information for you below VocoPro 1728 Curtiss Court La Verne CA 91750 Toll Free 1 80
13. alled and used according to the instructions found in the owner s manual may cause interference harmful to the operation of other electronic devices Compliance with FCC regulations does not guarantee that interference will not occur in all installations If this product is found to be the source of interference which can be determined by turning the unit Off and On please try to eliminate the problem by using one of the following measures Relocate either this product or the device that is being affected by the interference Use power outlets that are on different branch circuit breaker or fuse circuits or install AC line filter s In the case of radio or TV interference relocate reorient the antenna If the antenna lead in is 300 ohm ribbon lead change the lead in to coaxial type cable If these corrective measures do not produce satisfactory results please contact your local retailer authorized to distribute Vocopro products If you can not locate the appropriate retailer please contact Vocopro 1728 Curtiss Court La Verne CA 91750 CAUTION The apparatus is not disconnected from the AC power Source so long as it is connected to the wall outlet even if the apparatus itself is turned off To fully insure that the apparatus is indeed fully void if residual power leave unit disconnected from the AC outlet for at least CAUTION READ THIS BEFORE OPERATING YOUR UNIT 1 To ensure the finest performance please r
14. arked on the appliance 11 Grounding or Polarization Precautions should be taken so that the grounding or polarization means of an appliance is not defeated 12 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point where they exit from the appliance 13 Cleaning Unplug this unit from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning 14 Power lines An outdoor antenna should be located away from power lines 15 Nonuse Periods The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time 16 Object and Liquid Entry Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings 17 Damage Requiring Service The appliance should be serviced by qualified service personnel when The power supply cord or plug has been damaged or Objects have fallen into the appliance or The appliance has been exposed to rain or The appliance does not appear to operate normally or exhibits a marked change in performance or The appliance has been dropped or the enclosure damaged m 18 Servicing The user should not attempt to service the appliance b
15. but the double ends are not connected to the IN and OUT of a device there will be no sound So if you are not using effects be sure the Y cable is unplugged A mic with Remote Key Control QOL OO Ed Connect the Remote Key Control cable into the KEY CONTROLLER jack on the rear panel of the DA 3700PRO Vovopro DKC 100 MIC IN INPUT MIC 1A MIC 2 VIDEO NOTE If you are not using the Effects Loop be sure the LOOP BARS are re connected Without these there will be no sound MICIN Vocopro VSPM 1 MET AMIc 2 8686 sssss Front panel description S i mme 4 2 MICROPHONE INPUT jacks Connect your microphones to these inputs with 1 4 cables 20dB GAIN pads Press pad to an inward position to decrease the microphone output s gain by 2OdB Release pad to its outer position to have the microphone output revert back to NORMAL volume PEAK LED indicators The PEAK LED indicates when the input level is too high VOL control This control increases and decreases the VOLUME level for the MIC channels Turn clockwise to increase MIC VOLUME and counter clockwise to decrease the MIC VOLUME BAL control Use this control to fade the microphone output between the left and right channels When the balance control is directly centered equal sound comes out of both the left and right channels giving you perfect
16. dium is not a CDG Insert a CDG for playback TV or monitor device is not setto Change TV or monitor settings to the correct video setting accept video High pitched squealing Microphone is pointed to or to Move microphone away from occurs when using the close to speakers speakers microphone Treble level s are too high on Turn down treble level s on microphone channel s microphone channel s No microphone output is The microphone is not turned on Turn on the microphone present The microphone cable is either Tighten or replace the microphone loose or not functioning cable The Microphone Volume for that Turn up the Microphone Volume for channel is set to a minimum that channel The microphone is not functioning Replace the microphone correctly 2 93 7 7 THE SINGER S ULTIMATE CHOICE Vocopro 2005 V 1 0 WWW VOCOPRO COM
17. ead this manual carefully Keep it in a safe place for future reference 2 Install your unit in a cool dry clean place away from windows heat sources and too much vibration dust moisture or cold Avoid sources of hum transformers v motors To prevent fire or electrical shock do not expose to rain and water 3 Do not operate the unit upside down 4 Never open the cabinet If a foreign object drops into the Set contact your dealer 5 Place the unit in a location with adequate air circulation Do not interfere with its proper ventilation this will cause the internal temperature to rise and may result in a failure 6 Do not use force on switches knobs or cords When moving the unit first turn the unit off Then gently disconnect the power plug and the cords connecting to other equipment Never pull the cord itself 7 Do not attempt to clean the unit with chemical solvents this might damage the finish Use a clean dry cloth 8 Be sure to read the Troubleshooting section on common operating errors before concluding that your unit is faulty 9 This unit consumes a fair amount of power even when the power switch is turned off We recommend that you unplug the power cord from the wall outlet if the unit is not going to be used for a long time This will save electricity and help prevent fire hazards To disconnect the cord pull it out by grasping the plug Never pull the cord itself 10 To prevent lightning dam
18. ew each plastic bind until you are able to see an interior hole for speaker wire this is easier to locate when viewing from a side angle Slide the speaker wires into the slots and tighten the plastic binds to tighten them in place Be sure there is no insulation on the speaker wire preventing conductivity Speakers Getting connected cont Mic s connection man 5 Using mic cable with 1 4 end connect the to either of the DA 3700PRO s microphone inputs Effects Loop connections Source Music Music from a DVD or CD player By using the built in Effects Loop you can add ef fects such as a professional Digital Key Controller to the source player s music without compromising the quality of the original signal To use the effects loop connect an RCA cable from the DA 3700PRO s EFFECTS LOOP L or H OUT jack to the effects unit input Then connect an RCA cable from the effects unit output into the DA 3700 s L or R IN jack Vocals The MIC INSERT jacks on the rear panel allow you to loop the vocals through an effects unit NOTE In or der to do this you must have a 1 4 Y adapter cable not included for each microphone line Connect the single end of the Y cable into the MIC INSERT jack Connect one side of the double end into the input on the effects device and the other end into the output of the effects device NOTE If the Y cable is plugged into the DA 3700PRO
19. eyond that described in the operating instructions All other servicing should be referred to qualified service personnel Note To CATV system installer s U S A This reminder is provided to call the CATV system installer s attention to Article 820 40 of the NEC that provides guidelines for proper grounding and in particular specifies that the cable ground shall be connected as close to the point of cable entry as practical FCC INFORMATION U S A 1 IMPORTANT NOTICE DO NOT MODIFY THIS UNIT This product when installed as indicated in the instructions contained in this manual meets FCC requirements Modifications not expressly approved by Vocopro may void your authority granted by the FCC to use this product 2 IMPORTANT When connecting this product to accessories and or another product use only high quality shielded cables Cable s supplied with this product MUST be used Follow all installation instructions Failure to follow instructions could void your FCC authorization to use this product in the U S A 3 NOTE This product has been tested and found to comply with the requirements listed in FCC Regulations Part 15 for Class B digital devices Compliance with these requirements provides a reasonable level of assurances that your use of this product in a residential environment will not result in harmful interference with other electronic devices This equipment generates uses radio frequencies and if not inst
20. ginal natural state Raises the key of the music DA 3700PRO DIGITAL KARAOKE MIXING AMPLIFIER WITH KEY CONTROL b LOW NORMAL HIGH MIC MASTER MUSIC MASTER VOLUME VOLUME MIC MASTER D wm MON n 4 A MUSIC VOL VOLT DA 3700PRO yag e Advanced operations Balancing the Music with the Vocals The DA 3700 Pro has MASTER HIGH MID and LOW controls for both the music and the microphone levels which enables you to adjust your mix levels with precision resulting in a professional sounding mix If you find that the music is too loud simply adjust the MUSIC VOLUME control Also keep in mind that HIGH MID and LOW levels also affect the overall sound and can be adjusted to correct sound balancing problems Excessive high treble frequencies can lead to feedback so be careful when adjusting them Balancing a Microphone Channel When adjusting Mic levels it is recommended to do so in this order First adjust the MIC VOLUME control to approximately 50 Shown on Fig 1 Then balance the LOW MID and HIGH controls to approximately 40 60 Shown on Fig 2 Start background music with the MUSIC VOLUME set at approximately 5096 Shown on Fig 3 Finetune each MIC CHANNEL as necessary till you get a clean balanced mix Remember to compensate if the background music has striking volume changes To do this you can utilize the 20dB GAIN PAD The 20dB Gain Pad
21. l input e 2 Way Binding Post Speaker Outputs Remote Control e 10V 220V Compatible e Dimensions 16 W x 14 D x 55 H Getting connected CD DVD player connection VocoPro DKP 10G You can simultaneously connect up to two CD DVD players to the DA 3700PRO s switchable A V channels Using the DA 3700PRO s remote or front panel you can easily switch between channel A and Channel B Audio Connect the stereo L R RCA cables from the Output of your CD DVD player to the VCD CD INPUT A or the DVD INPUT L R inputs on the rear panel of the DA 3700PRO Video Connect the video RCA cable from the Video Output of your CD DVD player to the VIDEO INPUT on the rear panel of the DA 3700PRO TV Display device connection Display Device Vocopro LTV 5 The DA 3700 has two video inputs and two video outputs Video inputs A and B correspond to the two input channels The video that is being input into VIDEO input A will only play when input channel A is active Likewise the video that is being input into VIDEO input B can only be viewed if input channel B is active Both Video Outputs send the same picture simultaneously to two different TVs or display devices Connect the Video RCA cable from the VIDEO output on the DA 7 to the Video Input on your TV or display device NOTE Switch between Inputs A and B either by using the A B buttons on the DA 370
22. nnels A and B DIGITAL KEY CONTROL Use these buttons to raise or lower the musical key of your source music CD DVD player The LEDs indicate where the current key of the music is b Lowers the key of the music H Restores the music back to its original natural key Raises the key of the music MIC MASTER VOLUME control Use this to control the overall volume of both microphone channels Turn clockwise to increase the master microphone volume and counter clockwise to decrease the master microphone volume MUSIC MASTER VOLUME control Use this to control the overall volume of the music from the CD DVD player that is input into the DA 3700PRO Basic operations Switching between input channels Use the A and B input buttons on the DA 3700PRQ s front panel or remote control to switch between the two input channels DA 3700PRO DIGITAL KARAOKE MIXING AMPLIFIER WITH KEY CONTROL NEUTRAL MIC MASTER VOLUME MUSIC MASTER VOLUME PULL 74 Ry 7 RS tr MUSIC VOL Nez T 2 DA 3700PRO Using Digital Key Control Digital Key Control enables you to adjust the key of the source music CD DVD player to fit the vocal range of the person who is singing The key be adjusted by using the key control buttons on the DA 3700 s front panel the remote control or from a Hemote Key Control microphone b lowers the key of the music 4 Resets the key back to its ori
23. toggles between a current volume level and reduced gain volume level This control can be used to immedi ately go from one volume level to another by a quick push of the button Once all the settings are complete do a complete song for complete balancing success Fig 2 1 V am 15 0 100 i 0 100 i 096 100 Balancing the Music Channel When adjusting the music levels follow the same procedure as seen above for Mic levels Troubleshooting PROBLEMS SOLUTIONS No sound coming from Input Selector is set incorrectly Change Input Selector to the selected music source correct current playing source Music Master Volume control is Raise Music Master Volume level to set to minimum an appropriate level The Effect Loop bars are either Connect the Loop Bars horizontally not inserted or inserted L OUT to L IN and R OUT to incorrectly or the device R IN or reconnect the connected connected to the Effect Loop is device as stated in the instruction incorrectly working manual Speakers and Speaker Cables Check Speakers and Speaker are either not connected loose Cable connections Tighten or malfunctioning replace if necessary Source player is functioning Replace player and reset the incorrectly DA 3700PRO s power supply There are no graphics Video cable s are not properly Reconnect cables firmly to correct on the screen connected video jacks as stated in the instruction manual Disc me
24. under constant exposure Level Example 90 Subway Motorcycle Truck traffic Lawn Mower Garbage truck Chainsaw Pneumatics drill Rock band concert in front of speakers Gunshot blast Jet plane Rocket launching pad Information courtesy of the Deafness Research Foundation 4 opecifications VocoPro DA 3700 Digital Karaoke Mixing Amplifier with Key Control Maximum Output 120W 120W at 4 Ohm 100W 100W at 8 Ohm S N ratio 6568B mic on 7OdB mic off THD 0 596 Frequency Response 20Hz 20KHz Noise Level lt 10 Tone Balance Control 12dB Balance Input 1 5dB Split Level gt 35dB Mic Sensitivity lt 30mV Mic Frequency Sound 100Hz 2 5kHz MIC Tone Treble 10dB Bass 10dB Supply Voltage 110V 220V Features 9 step Digital Key Control e 2 Unbalanced 1 4 Microphone Inputs with 20dB Gain Pad Volume Balance Echo and 3 Way EG Controls on each Channel 2 Switchable RCA A V Inputs for Source Players DVD CD G VCD etc 3 RCA Audio Outputs Record Line and Microphone for Output to Recording Devices Amplifiers and Mixers 2 RCA Video Inputs Output for Video Connection to a TV or Monitor Device Effect Loop for Integration of Outboard Effect Units Master Volume Balance and Low Mid High Frequency Controls for input source music Master Lo Hi frequency Repeat and Delay Echo controls Master Microphone volume control Hemote Key Contro
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