Description
Overview: The LPA-E.4 is an active 4-channel line output converter designed for adding aftermarket amplifiers to a factory radio. The two pair of speaker level inputs are compatible with most factory stereo systems. They will accommodate up 40 volts per channel (equivalent to 400 watts at 4Ω).
Connections:
- Power: removable 4-pin Phoenix terminal accommodates bare wire up to 12-gauge
- +12 volts: fused constant +12 volt source (neither a fuse nor a fuse holder is included)
- Ground: chassis ground
- Remote In: unit turns on when +12 volts is applied to this terminal
- Remote Out: +9 volt output when unit is on
- Speaker Level Inputs: removable 8-pin Phoenix terminal accommodates bare wire up to 12-gauge
- Line Outputs: two pair of stereo RCA jacks; front and rear
- Remote: RJ-14 jack for the included wired remote control
Clip Indicators: Independent LEDs for the front and rear channels indicate when the output signal is too high and is clipping, making it easy to maximize the output levels without distortion.
Controls:
- Input Mode: 2-position switch; 2-channal or 4-channel (2-channel uses only the front inputs)
- Load Select: 3-position switch; 20Ω, 60Ω, or 20kΩ; use the lower settings to simulate a speaker load if required by the factory radio
- Low Pass Filter: 2-position switch; on/off; a 250 Hz low pass filter can be engaged for the rear channel outputs
- Bass Boost: rotary dial; 0-12 dB; when the low pass filter is engaged, bass boost can be added to the rear channel outputs; centered at 45 Hz
- Gain: independent rotary dials for the front and rear outputs; -27.3 to +3.2 dB range
- Turn-on Mode: 2-position jumper
- DC Offset: turns on when it senses a DC offset voltage on the speaker level input
- Remote: turns on when +12 volts is applied to the remote in terminal
- Ground Isolation: 3-position jumper; Ground, ISO (isolated), or 200Ω; change the position in the case of ground loop noise
Wired Remote: The included wired remote controls the rear RCA output level. It’s designed to be dash mounted, within reach of the driver. The mounting bracket can be used, or the remote can be custom mounted through the dash or console. The face of the mounting bracket is 1″ x 1″ and the remote is approximately 3″ deep. If custom mounting, the hole required for the shaft is just over ¼” diameter.
Specifications:
- Maximum Input Voltage: 40 volts/400 watts at 4Ω (using the 20kΩ input impedance)
- Maximum Output Voltage: 9.5 volts RMS
- DC Offset Range: 3-7 volts
- Input Load: 20Ω, 60Ω, or 20kΩ
- Output Impedance: <120Ω
- Output Gain: -28 dB to +1 dB
- Signal to Noise Ratio: >110 dBA at 6.4 volts output
- THD+N: <0.01%
- Input Sensitivity: 0.5-40 volts
- Frequency response: 10 Hz-20 kHz
- Current Draw: 110mA (max)
- Low Pass Filter: 250 Hz (switchable, rear output only)
- Bass Boost: 0-12 dB centered at 45 Hz (rear output only)
- Dimensions:
- Width: 6⅞” (8″ including cables)
- Height: 1″ (1⅛” including protruding jumpers, which can be trimmed flush)
- Depth: 3¼”
