Front Panel CONNECTIONS/CONTROLS

tronics and the lower your speaker load, the more heat is generated. For low impedance speaker applica- tions or restricted ventilation instal- lations, an external cooling fan may be advisable.

9.Battery and ground connections to the vehicle should be made with crimped ring terminals of the appro- priate size (surface area is what counts); soldering the terminals after crimping is also recom- mended.

10.Due to the high-frequency MOSFET switching power supply, filtering the power cable is not generally required (remember that the amp can’t deliver full output if the power supply is restricted). Proper grounding of the signal source is mandatory for the amplifier to reach its performance peak. If the RCA inputs are not grounded adequately via the signal source, electrical noise from the vehicle may be picked up in the system.

1.RCA Input Jacks - Accepts line level outputs from head units or signal processors at voltages between 150mV and 7.5 volts.

2.RCA Line Output Jacks - These pass through RCA jacks can be used to send the input signal to a second amplifier.

3.Gain Control - Controls the ampli- fier’s sensitivity and is used to match the input level of the ampli- fier to the output level of the signal source.

4.Subsonic Switch - The subsonic filter attenuates frequencies below 30Hz by 24dB per octave.

5.Bass EQ Switch - Adds 8dB of bass boost to the subwoofer when selected.

6.Remote - Controls the subwoofer amplifier gain, from a remote loca- tion for ease of adjustment during listening.

Warning: DO NOT connect a level control knob from other manufacturers to the Remote Sub Level Control of any Directed amplifier. Even though the connectors fit properly, the control knob and connector pin positions may be different and the amplifier will be damaged.

7.LPF Control - Controls low pass filter cutoff from 30Hz to 250Hz.

8.Phase Switch - 0° or 180° selec- table for switching the phase output to the woofer.

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