Diamond Audio LOC22 User manual
LOC22 | 2 Channel Line-Output Converter
LOC24 | 4 Channel Line-Output Converter
Quick Start Guide
GAIN
Variable: -27.3dB — +3.2dB
Allows gain adjustment of
the output signal
CLIP
Indicates signal clipping when
gain is set to high
REMOTE
Remote Level Control Knob
for Rear Channels
RCA SIGNAL OUTPUTS
BOOST
Variable: 0dB — 12dB
When LPF is ON, provides
Bass Boost (45Hz) for
Rear Channels
LPF
Low Pass Filter
Allows 250Hz low pass
filter for Rear Channels
LOAD SELECT
Selectable: 20Ω / 60Ω / 20kΩ
Default: 20kΩ
For factory audio systems
requiring a resistance load to
output audio, select 60Ω first,
then 20Ω. All others use 20kΩ
setting
SPEAKER SIGNAL INPUTS
Connect to head unit or
X
FULLY OPEN TERMINALS
BEFORE INSERTING WIRE
12V
Connect to a fused
+12V constant source
GND
Connect to a good
chassis ground
REM IN
Remote turn on input (+)
REM OUT
Remote turn on output (+)
The LPA will provide a
+12V Remote Output using
DC Signal Sense from the
Right channel inputs
GROUND ISOLATION
Selectable: GND / ISO / 200Ω
Default: ISO
If ground / engine noise is present,
the jumper can be repositioned
Features & Wiring Information
The Diamond Audio LOC22 and LOC24 can be used to add amplifiers to an audio that does not have RCA outputs
or when replacing OEM Radio and retaining the factory amplified system. Variable Gain Controls with Clipping
Indicators, Selectable Ground Isolation and Load Select features ensure a pure, noise-free signal for any type of
audio system.
This Quick Start Guide will get you going, but if you need additional help or information, please visit our website
or contact Technical Support.
Installation
Speaker level input from a radio to RCA level output for an aftermarket amplifier is the most commonly used
configuration for the LOC22 and LOC24. This will create RCA level outputs from a radio that only has speaker level
outputs.
Below, the Positive (+) and Negative (-) wires of two speakers are “tapped” and connected to the amplifiers turn-on/
When the radio is turned on. the LOC will continue to play as normal. The REM OUT is connected to the amplifiers
turn-on. When the radio is turned on, the Converter will automatically turn on the amplifier. Lastly, the RCA Signal
Outputs from the LOC are connected to the aftermarket amplifiers inputs.
CHASSIS GROUND (-)
12V CONSTANT POWER (+)
REMOTE AMP TURN-ON
CHASSIS GROUND (-)
12V CONSTANT POWER (+)
REMOTE AMP TURN-ON
Model Number LOC22 LOC24
Channels 2 IN / 2 OUT 2 IN / 4 OUT
Operating Voltage 9V—16V 9V-16V
Max Input Level (20kHΩLoad Setting) 40V / 400W @ 4 Ohms 40V / 400W @ 4 Ohms
Auto Turn On DC Offset / Remote DC Offset / Remote
Output Voltage MAX @ 13.8V 9.5V RMS 9.5V RMS
Turn On Trigger (DC-Offset) 3V—7V 3V—7V
Load Input Impedance 20Ω, 60Ω, 20KΩ 20Ω, 60Ω, 20KΩ
Output Impedance <120Ω <120Ω
Variable Gain Adjustment -28dB—+1dB -28dB—+1dB
Signal To Noise >110dBA @ 6.4V Output >110dBA @ 6.4V Output
THD+N < 0.01% < 0.01%
Input Sensitivity 0.5V—40V 0.5V—40V
Frequency Response 10Hz—20kHz 10Hz—20kHz
Current Draw (Max) 40mA 40mA
Low Pass Filter <250Hz <250Hz
Bass Boost 0dB to +12dB 0dB to +12dB
Clip Indicator YES YES
Remote Level Control YES YES
Chassis Type Stamped Steel Stamped Steel
Terminal Gauge 18AWG / Quick Connect 18AWG / Quick Connect
For more installation examples, tech tips and updates,
visit the DIAMOND AUDIO product pages on
DiamondAudio.com
Specifications
3761 South Hill Street
Los Angeles 90007, USA
P 213-261-4161 / F 213-947-4767
2021 Diamond Audio All rights reserved.
(a division of CV & DA Holdings, Inc.)
WWW.DIAMONDAUDIO.COM
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