PowerBass ALC-2, ALC-4 User Manual

2-Channel LOC / Line Driver

User’s Manual

Please read through this manual to familiarize yourself with your new signal processor. Should your PowerBass AutoSound

line output converter ever require service, you will need to have the original dated receipt.

ALC-2

Thank you and Congratulations

Thank you for your decision to purchase a PowerBass ALC-2 Line Output Convertor. The ALC-2 is a 2-chan­nel LOC (Line Output Converter) that changes the high level (speaker) output from your factory radio to a low
level (RCA) signal for use with aftermarket amplifiers.

Your PowerBass ALC-2 has been designed and engineered using the latest in microprosessor technology
and will afford you many years of listening enjoyment. Additionally, this LOC also functions as a Line Driver
that takes the input voltage of the radio (source unit) and increases it up to 13 volts. The increased signal is
delivered to your amplifier for a more lifelike sound with less noise, less distortion and more dynamic range.

L

OC / LINE DRIVER

This installation manual contains valuable information on how to get the most from your new PowerBass
ALC-2 Line Output Converter. The increased performance from the Line Driver function will benefit virtually
any car audio system.

∆ Warning ∆
Continuous exposure to sound pressure levels in excess of 100 dB can cause permanent hearing loss. PowerBass Autosound Speakers are
capable of producing sound pressure levels well over 170 dB. Please observe all local sound ordinances while listening to your PowerBass
Autosound system. PowerBass USA, Inc. accepts no liability for hearing loss, bodily injury, or property damage due to the result of use or
misuse of this product.

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2-CHANNEL LOC / LINE DRIVER FEATURES

2-Channel LOC: Line Output Converter electronically adjusts high level speaker outputs to low level RCA
outputs. Necessary when integrating OEM (factory) radios with aftermarket amplifiers and speakers.

Auto Turn On Sensing Circuit: Picks up the voltage from the High or Low level inputs thus eliminating
the need to hard wire the remote input.

Selectable High/Low Input: Allows you to use either a high level (speaker) input or low level (RCA) input.

Variable Gain: Matches the output level from the radio to the LOC for maximum signal.

LED Clipping Indicator: An Orange LED gives you visual confirmation when setting the Gain control

RCA Low Level Output: Tiffany style right and left RCA jacks for maximum signal transfer.

13Vrms Output: As a line driver the ALC-2 can boost the output voltage of the radio (head unit) up to 13

volts before delivering it to the amplifier inputs.

Compact Size: Thanks to the extensive use of Surface Mount Devices the ACL-2 can be mounted under
dash, behind the dash or virtually anywhere.

Additional Features: Mounting brackets, hardware and plug-in connectors for easy pre-wiring.

ALC-2 SPECIFICATIONS

Maximum Input Power (High Level): 100 watts
Maximum Input Voltage (Low Level): 9.5 volts
Maximum Output Voltage: 13 volts
Frequency Response: 10Hz-100KHz +/-3dB
Total Harmonic Distortion: <0.4%
Signal to Noise Ratio: 94dB
Low Level Input Impedance: >20,000 ohms
High Level Input Impedance: >180 ohms
Output Impedance: <100 ohms
Power Supply: PWM DC/DC
Current Draw: 150mA
Recommended Fuse: 1-amp
Chassis Measurements (W x L x H): 4.4" x 2.3" x 1.1" (111mm x 58mm x 28mm)

Due to continuing improvements these specifications are subject to change without any notice.

CONTROL PANEL LAYOUT

1. INPUT (Low Level)

These RCA input jacks allow a low level left and right channel signal input from the source unit.

2. OUTPUT (Low Level)

These RCA output jacks provide signal to your amplifier.

3. INPUT Switch

This switch is used to select the input of the ALC-2. There are two possible inputs. The RCA position selects
the low level RCA input (0-6V) and the Speaker position selects the high level input.

4. SPEAKER INPUT (High Level)

This terminal block allows for a high level left and right channel signal input from the source unit. Use this if
your source unit does not have low level RCA outputs.