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1. IN 6 BIBI S m gt ma mn it 4 Mn Ground SLAVE AMPLIFIER CD 12V id GND EM O aS ee I OKUR DE DRIVE AN SS OA OA oO I Arr Ground A CAUTION A7 3500H 1 A7 3500L 1 amp A7 7500 1 Amplifiers Linked minimum impedance is 2 ohms A7 3500L 1 working voltage is 8 5 16volts A7 3500H 1 and A7 7500 1 working voltage is 8 5 18volts 05 www dbdrive net 4 TROUBLE SHOOTING NO SOUND NO OUTPUT 1 Please check all connections cables routing short and voltage at OKUR amplifiers and headunit 2 Please check built in or external fuses If it is brown please repalce with new one 3 Please check whether speakers work well you can test speakers by connecting to another amplifiers PROTECTION 1 Please check overload overheat thermal short voltage and DC offset 2 Minimum working impedance for A7 3500L 1 A7 3500L 1 and A7 7500 1 is 1 ohm for single unit and 2 ohm for linked operation 3 If the OKUR competition amplifiers are shut down due to overheat Reset by turning off the remote input and allowing time to cool down Please make sure there are no airflow obstructions around OKUR competition amplifier to prevent thermal protection 4 A7 3500L 1 has voltage protection as 8 5 16 volts A7 3500H 1 and A7 7500 1 have voltage protection as 8 5 18volts If Voltage is out of range as above OKUR competition amplifiers will be protected POOR BASS RESPONSE 1 Pleas
2. of pilot cables will not present a harzard to any cables control cables fuel lines fuel tanks hydraulic lines or other vehicle systems or components 3 3 12V GND REM CONNECTION 12V POWER CONNECTION Before mounting OKUR competition amplifiers disconnect the negative wire from battery to protect any accidential damage to amplifier and audio system A7 3500L 1 A7 3500H 1 and A7 7500 1 are designed to use minimum O gauge cables Connect the power cables to power terminal labeled as 12V A7 3500L 1 A7 3500H 1 and A7 7500 1 are not equipped with fuses so you need to install external fuses In order to install external fuses connect one end of fuse holder to the power cable and the other end of fuse holder to positive battery within 18in of the same cable gauge This fuse location will protect the system and the vehicle against the possibility of a short circuit in the power cable Be sure to use fuses and fuse holders adequate for the current draw application 02 WORLD RECORD BREAKING TECHNOLOGY GND GROUND CONNECTION Locate a secure grounding connection as close to OKUR series as possible Make sure the location is clean and provides a direct electrical connection to the frame of the vehicle Connect one end of a short piece of the same gauge cable as the power cable to the grounding point Run the one end of the cable to the grounding point Run the other end of the cable to the mounting location Connect th
3. SY OKUR A7 3500H 1 A7 3500L 1 A7 7500 1 User Manual Installation Instructions Owners Manual www dbdrive net DUE TO CONTINUOUS IMPROVEMENT OF THE PRODUCT THE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE WORLD RECORD BREAKING TECHNOLOGY 1 OKUR COMPETITION AMPLIFIERS SPECIFICATION 1 1 OKUR COMPETITION AMPLIFIERS Load Voltage amp THD A73500L 1 A7 3500H 1 A7 7500 1 Aohm 14 4 volts amp 1 1 X 900 1 X 900 1 X 2000 20hm 14 4 volts amp 1 1 X 1800 1 X 1800 1 X 4000 lohm 14 4 volts amp 1 1 X 3500 1 X 3500 1 X 6500 Working Voltage 10 16Volts for A7 3500L 1 8 5 18Volts for A7 3500H 1 amp A7 7500 1 Frequency Response 20Hz 250Hz Signal to Noise Ratio lt 100dB Damping Factor 250 lt Low Level Input 6V 0 2V Low Pass Filter Variable 35Hz 250Hz 24dB Slope Bass Boost 45Hz Variable 0 9dB Subsonic Filter 24dB slope Variable 10Hz 50Hz Phase Shift Variable 0 180 degree Master slave Linkable Yes Remote Level Control Yes RCA line Output Yes Minimum working impedance 1 ohm for single unit 2 ohm for linked 2 OKUR COMPETITION AMPLIFIER S CONTROL amp CONNECTION CD jl abi C_D EI Remote Gain Subsonic Bass Boost LPF Phase O power I O e e 8 8 Input 0 2V 10Hz 50Hz 5Hz 250Hz 0 Outnut os Drive le EE CD Lt CD CC C_D DI genk REM essee else INPUT Connect RCA output cables from the hea
4. d 12V with a trigger cable coming from the head unit SPEAKER OUTPUTS It connects amplifiers terminal to subwoofer speakers Minimum speaker wire is 12 gauge Minimum impedance is 1 ohm for single unit Linked connection s minimum impedance is 2 ohm In case you install the OKUR Competition amplifiers by yourself please read owner s manual very carefully before your installation please take all steps into consideration or you can have DB Drive or DB Research s authorized dealer to check installation and set your car audio systems 3 1 MOUNTING PREPARATION Disconnect the negative battery cable before mounting your OKUR competition amplifiers or making any connections Check the battery and alternator ground connections Make sure they are properly connected and free of corrosion before selecting a mounting location Please take some concerns into consideration with cooling efficiency and safety 3 2 MOUNTING PREPARATION The OKUR competition amplifiers use a spcially designed heat radiation heatsink to avoid excessive heat from OKUR circuitry But for better heat dissipation it is good to find the mounting location where you can install OKUR vertically with the heatsink fins and better air flow around heatsink For the safety You have to find a dry and well ventilated location and make sure any cables and drilling car equipment are not interfere with mounting location Be sure the mounting location and drilling
5. dunit to POWER amp PROTECTION INDICATOR OKUR Competition amplifiers RCA Input Power LED Green lit shows normal operation Protect LED RED lit shows general malfunction OUTPUT faulty connection or thermal protection Is used when connecting multiple amplifiers www dbdrive net GAIN 6V 0 2V Matching the output voltage of the headunit s RCA line outs to OKUR amplifiers input section SUBSONIC FILTER 10Hz 50Hz 24dB Oct Control the high Pass point for the speaker outputs to eliminate extreme low frequencies that can damage your subwoofers BASS BOOST 0 9dB 45Hz It boosts the bass O 9dB REMOTE LEVEL CONTROL PORT This port is for connecting remote gain level control LOW PASS FILTER 35Hz 250Hz 24dB Oct Controls the low pass point for the speaker outputs PHASE 0 180 degree It controls phase from O gt 180 degree OUTPUT MASTER INPUT SLAVE OUTPUT MASTER INPUT SLAVE connection makes OKUR Competition amplifiers as daisy china connection to 2 ohm 3 INSTALLATION 12V POWER CONNECTION This must be connected to the fuse positive terminal 12V of the battery Recommenede wire is O gauge for A7 3500L 1 A7 3500H 1 amp A7 7500 1 Check the battery voltage GND GROUND CONNECTION It is connected to the Negative or ground cables of the vehicle Recommenede wire is O gauge for A7 3500L 1 A7 3500H 1 amp A7 7500 1 REM REMOTE It is connected to switche
6. e check speaker polaritys WHINING NOISE 1 Engine noise is caused by poor grounding of OKUR amplifiers headunit other components battery or alternator so please check all grounding connections 06 LIMITED WARRANTY Due to the nature of the use of this product DB DRIVE warrants the OKUR A7 3500L 1 A7 3500H 1 and A7 7500 1 amplifiers for a period of 90 days from the date of original invoice This warranty applies to the original purchase only The Amplifier must be purchased directly from an authorized DB Drive dealer or DB Research This limited warranty does not extend to units that have been subjected to misuse abuse neglect or accident Products that in DB DRIVE s judgment shows evidence of having been altered modi ed abused or serviced without DB DRIVE s authorization will be ineligible under this warranty The original sales invoice must be presented at the time any warranty claim is made All Amplifier returned for warranty will be inspected before any warranty agreement is issued When warranty is approved the unit will be repaired to its original working condition For any guestions about the warranty or to obtain warranty service please contact DB Research RESEARCH DB Research L L 302 Hanmo re Industrial Parkway Harlingen TX 78550 ph 877 787 0101 ww wdbdrive net ON
7. e ground cable to the screw terminal labeled as GND REM REMOTE CONNECTION Run a remote turn on cable from the headunit s remote swithed 12V output OKUR COMPETITION AMPLIFIER 12V GROUND REMOTE CONNECTION DIAGRAM sil Remote turn on CD Speaker REM eeeees Elsies mm sa ag 12V I BATTERY a Ground 3 4 SPEAKER CONNECTION DB Drive recommends to use minimum 12 gauge speaker connecting cables Run 12 gauge speaker connecting cables from your speakers to OKUR amplifiers mounting location Keep speaker cables away from the power cables and OKUR amplifier s input cables Use grommets anywhere the cables have to pass through the holes in the metal frame or sheet metal Connect to the speakers according to the type of terminals on each speaker Strip 3 8 of insulation from the end of each cable and twist the cables strands together tightly Make sure there are no stray strands that might touch other cables or terminals and cause a short circuit Crimp spade lugs over the cable ends or tin the ends with solder to provide a secure termination Connect the cable ends to OKUR competition amplifiers as speaker system diagram OKUR SPL COMPETITION DIGITAL MONOBLOCK AMPLIFIERS SPEAKER CONNECTION DIAGRAM 1 CD Power C_D 12V GND AN 3SAAHA AN CAUTION A7 3500H 1 A7 3500L 1 amp A7 7500 1 amplifiers minimum impedance is 1 ohms 03 L
8. inked minimum impedance is 2 ohms Bs denne www dbdrive net OKUR COMPETITION DIGITAL MONOBLOCK AMPLIFIERS SPEAKER CONNECTION DIAGRAM 2 AN 3SAAHAI 3 5 OKUR COMPETITION AMPLIFIER S MULTI LINKING CONNECTION Multi linking connection allows linking of 2 digital amplifiers to work as 1 Please read the following connection diagram cautiously to ensure the correct connection Step 1 Connect the master amplifier to the headunit and set its output master and input slave switch to output master position Step 2 Connect the master and slave amplifiers in daisy chain RCA Jack as shown in the diagram Step 3 Set slave amplifier output master amp input slave switch to slave input position Headunit JEER MASTER AMPLIFIER R L CD CD CD EED Remote Input Output Subsonic Bass Boost LPF Phase ZA A Ta L Oros H Q ell 8 SLAVE AMPLIFIER C_D CC D CD CD Remote Input Output Subsonic Bass Boost LPF Phase EX LG N a OO Seeelleses OO DB DRIVE DEUR CD 04 WORLD RECORD BREAKING TECHNOLOGY Step 4 Connect speaker cable on master amplifier to subwoofer Step 5 Connect speaker cable on slave amplifier to subwoofer Step 6 Connect speaker cable on master amplifier to speaker cable on slave amplifier Headunit sind Remote turn on MASTER AMPLIFIER CD Cn 12V id GND REM aS i 9 Ay Ground n

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