6. INPUT Switch
Matches the input from the Source Unit to that of the amplifier, either 2 or 3 Channel with separate subinput. This eliminates the
use of “Y” adapters and provides a cleaner input signal. When the 2-Channel mode is selected, both front and sub outputs will
operate from front low level RCA / high level input.
When the 3-CH MODE is selected, both the front and subwoofer inputs will be used. This will allow balancing level between the
front and subwoofer outputs.
7. HPF (High Pass Filter)
This control is continuously adjustable from 40Hz to 400Hz at 12dB per octave when the x-over switch is set to HPF.
8. X-OVER Switch for FULL/HPF
Activates the built-in electronic crossover network. Works in conjunction with the HPF adjustable control. When set to FULL
the amplifier run full range and the electronic crossover circuitry is bypassed.
9. REMOTE LEVEL INPUT Connector
Connector port for the remote level controller. By this the subwoofer output level can be adjusted
from the driver’s
seat.
10. FRONT GAIN Control
This control match the input sensitivity of the amplifier to the source unit from 250mV up to 5 volts.
11. FRONT INPUT Connector
This is both a Low and High Level input port. Using the supplied wiring harness for low level RCA inputs or High Level (speaker
level) input.
12. POWER/STATUS Indicator
This clear LED lights Blue when the power is on, or turns Red constantly when the built-in protection circuitry is activated. Red
indicates a problem with the system in relation to the amplifier /see troubleshooting tips).
13. SUBWOOFER OUTPUT
Set screw subwoofer output terminal. Be sure to observe the correct speaker polarity and follow the speaker wiring diagrams
starting on page 21.
14. FRONT SPEAKER OUTPUT
This 4-pin Molex style connector is where the speaker output harness plugs in. Be sure to observe the correct speaker polarity
and follow the speaker wiring diagrams starting on page 21.
15. BATT+ (Power Input Connection)
This terminal is the main power input for the amplifier and must be connected directly to the positive (+) terminal of the car
battery. The solderless terminal block is designed to accommodate up to 4-gauge power wire.
FUSE-IMPORTANT
Due to the limited space on the DD amplifier chassis they do NOT come with user replacablre fusing! use an in-line fuse holder
that can be
connected directly to the BATT+ input on the amplifier. Please note the proper ampere fuse for each model.
Never replace a fuse with a higher rating then what is listed.
16. REM (Remote Input Connection)
This terminal must be connected to a sw12V
source. Typically, remote turn-on leads are provided at the source unit
that will turn on and off like the ACC, +12V.
17. GND (Ground Input Connection)
A good quality ground is required for your DD33-40 amplifier to operate at peak performance. A short length of cable the same
gauge as your power cable should be used to attach the ground terminal directly to the chassis of the vehicle. Make sure that all
of the paint is sanded or scraped away to ensure a quality ground connection.
NOTE: If installing in a boat, UTV or motorcycle make sure your ground wire is connected to the negative ( - ) terminal of
the battery.
Summary of Contents for DD Series
Page 19: ......
