DB Drive A7 3500H.1, A7 3500L.1, A7 7500.1 User Manual

A7 3500H.1, A7 3500L.1, A7 7500.1

User Manual

Installation Instructions/Owner’s 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

A7 3500L.1

1 X 900
1 X 1800
1 X 3500

01

10~16Volts for A7 3500L.1

8.5~18Volts for A7 3500H.1 & A7 7500.1
20Hz ~ 250Hz
< 100dB
250 <
6V ~ 0.2V
35Hz ~ 250Hz

0 ~ 9dB

10Hz ~ 50Hz
0 ~ 180 degree
Yes
Yes
Yes
1 ohm for single unit
2 ohm for linked

INPUT

Connect RCA output cables from the headunit to
OKUR Competition amplifiers’ RCA Input

OUTPUT

Is used when connecting multiple amplifiers

POWER & PROTECTION INDICATOR

Power LED - Green-lit shows normal operation.
Protect LED - RED-lit shows general malfunction,
faulty connection or thermal protection.

Load

4ohm
2ohm
1ohm

Voltage & THD

14.4 volts & 1%

14.4 volts & 1%

14.4 volts & 1%

A7 3500H.1

1 X 900
1 X 1800
1 X 3500

A7 7500.1

1 X 2000
1 X 4000
1 X 6500

Working Voltage

Frequency Response
Signal to Noise Ratio
Damping Factor
Low Level Input
Low Pass Filter Variable
(@ 24dB Slope)
Bass Boost @ 45Hz Variable
Subsonic Filter
(@ 24dB slope) Variable
Phase Shift Variable
Master/slave (Linkable)
Remote Level Control
RCA line Output
Minimum working impedance

2. OKUR COMPETITION AMPLIFIER’S CONTROL & CONNECTION.

t u p n I

L

R

L

R

t u p t u O

n i a G

V 6 z H 0 1 z H 0 5 B d 0 B d 9 z H 5 3 z H 0 5 2

0 0 8 1

V 2 . 0

c i n o s b u S t s o o B s s a B F P L e s a h P

t u p t u O
r e t s a M

t u p n I
e v a l S

e t o m e R

r e w o P

t c e t o r P

r e w o P

r e k a e p S

D N G M E R V 2 1 +

02

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 0 ~ 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 0 ~ 180 degree.

OUTPUT MASTER / INPUT SLAVE

OUTPUT MASTER / INPUT SLAVE connection makes
OKUR Competition amplifiers as daisy china connection
to 2 ohm.

+12V (POWER CONNECTION)

This must be connected to the fuse positive terminal
(+12V) of the battery.
Recommenede wire is 0 gauge for A7 3500L.1,
A7 3500H.1 & 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 0 gauge for A7 3500L.1,
A7 3500H.1 & A7 7500.1.

REM (REMOTE)

It is connected to switched +12V with a trigger cable
coming from the head unit.

SPEAKER OUTPUTS

It connects amplifier’s 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.

3. INSTALLATION

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 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 neg

ative ( - ) 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 0 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.

www.dbdrive.net