Orion Car Audio 4004 - Manual (Page 7)

AMPLIFIER SETTINGS
Four-Channel Amplifier Input Configuration
The 4CH / 2 CH switch routes input from the front inputs to the rear section of the amplifi-
er. This allows the Orion 4004 channel amplifier to utilize a single set of RCA's or high-level
inputs to feed signal to both the front and rear channels of the amplifier.
When the switch is to the right (2 CH position), signal from the front inputs is routed to the
rear channels. When the switch is to the left (4 CH position), front and rear inputs are inde-
pendent. This allows a source unit with an internal fader to fade between the front and rear
outputs.
Internal Crossover Configuration
The Orion 4004 amplifier uses multi-position switches to determine the crossover configu-
ration. The dual multi-position switches are located on the adjustment side of the amplifi-
er. Listed below are the switch positions and their respective crossover configurations.
When the switch is to the left (FULL position), the crossover section of the amplifier is
bypassed. Amplifier output is full range. When the switch is in the center (HIGH position),
the crossover is configured for high-pass operation. The crossover is fixed at 100Hz at 12dB
per octave. When the switch is to the right (LOW position), the crossover is configured for
low-pass operation. The crossover is fixed at 100Hz at 12dB per octave.
Input Gain
The Orion 4004 amplifier has separate front and rear level gain adjustments. The input sen-
sitivity of these adjustments range from 200mV up to 5V on the RCA inputs and 1V to 10V
on the high-level inputs. This allows easy integration from any source unit either with RCA
outputs or speaker outputs. Refer to the Testing the System and the Adjusting the Sound of
the System sections for detailed instructions on setting up the level controls.
INTELLi Bass Control
INTELLi Bass on the rear channels maximizes the performance of a subwoofer and allows
for continuous adjustment of low frequency boost on the rear channels. INTELLi Bass can be
adjusted from 0dB to 10dB of boost centered at 45Hz. Initially the Q is very low (wide). As
INTELLi Bass is added, the Q rises (narrows). This allows the Orion 4004 to overcome acoustic
deficiencies in your vehicle. The type of enclosure used, the sub-woofer's excursion capabil-
ity, personal preference, and attitude determine acceptable boost levels.
WARNING! Exercise caution when setting INTELLi Bass. Maximum boost can potentially
cause woofer damage due to overexcursion.
6 ©2003 Directed Electronics, Inc.