Crunch PX1025.2 User Manual

Place terminal in a secure
position so that it won’t
accidentally contact the
negative battery post
Power / Ground
cable size
It is critical to use the proper
power and ground cable. Select
the size listed here for your
amplier model. Always use high
quality copper cable.
Cable size recommendations for
multi amp systems are available
on our website.
Properly route power,
speaker and RCA cables
through the vehicle.
Choose a mounting location
that will provide adequate air
ventilation. Mount the amplier to
a secure surface. Do not mount
the amplier upside down.
Using spade terminals, connect the
+12V to the power cable from the
battery, the REM to the source unit
turn-on wire and the GND to the
chassis ground..
Strip each cable back approx 1/2”,
connect the +12V to the power
cable from the battery, the REM to
the source unit turn-on wire and the
GND to the chassis ground..
Bare metal
Connect the RCA cables to
the INPUT connectors. The
OUTPUT can be used to
provide input for a second
amplier.
The HI INPUT is for use with
source units that do not offer
RCA outputs. Use the supplied
harness to connect to the
source unit’s speaker output.
Connect the power cable to the
positive battery terminal. The
power cable must be fused
within 18 inches of the battery
terminal.
Re-connect the negative
battery terminal making sure it
is securely tightened.
Using spade terminals,connect
the speaker cables to the speaker
output connectors. Follow the
diagram below that best ts your
speaker conguration.
The chassis ground connection
is critical to the performance
of the amplier. Choose a
location that is close to the
amplier. Completely scrape
away the paint and use a nut
and bolt if possible.
DO NOT USE AN EXISTING
FACTORY BOLT!
Disconnect
negative battery
terminal
Run Cables
Mount Amplier
Power
Connections
Smaller amps
Signal Input
Low Level RCA
Power
Connections
Larger amps
Signal Input
High Level
Positive Battery
Connection
Re-connect
Negative Battery
Terminal
Speaker
Connections
Chassis Ground
Be prepared to disarm your vehicle’s alarm and
to enter your radio / source unit code.
Stereo
Installation
Before you start
Monoblock
single woofer Monoblock multiple woofers
Bridged
CAUTION
Many new and factory radios require a reset code when
disconnected from battery power. This is an anti-theft
feature. Before unplugging power, you must determine if
your radio/source unit requires a reset code. Check the
operation manual for your vehicle or contact the dealer.
1
2
3
5
a
5b
6
7
10
11
94
Turn the LEVEL control completely
counter-clockwise to minimum.
Level Control
8
9V 0.2V
INPUT
LEVEL
6V 0.2V
INPUT
LEVEL
PHASE
0 180
BASS EQ
0 10dB
BASS EQ
0 9dB
BASS EQ
0 12dB
15 35Hz
SUBSONIC
10 40Hz
SUBSONIC
30 250Hz
LPF
35 250Hz
LPF
40 300Hz
LPF
FULL
LP
HP
XOVER
MONO STEREO
MODE
FULL
LPF
HPF
XOVER
MONO STEREO
MODE
4CH 2CH
MODE
60 1.3KHz
HPF
60 1.2KHz
HPF
10 2.5KHz
HPF
10 1.5KHz
HPF
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT
RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER OUTPUT
SPEAKER
LEFT
RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER
LEFT RIGHT
BRIDGED
OUTPUT
SPEAKER OUTPUT
Right + (gray) 4CH REAR
Ch3 Right + (orange)
Ch3 Right - (pink)
Chassis Ground (black)
Ch4 Left + (blue)
Ch4 Left - (yellow)
Connect to factory speaker wire directly
Right - (brown)
Left - (green)
Left + (white)
Chassis ground (black)
Right + (gray)
Ch3 Right + (orange)
Ch3 Right - (pink)
Chassis Ground (black)
Ch4 Left + (blue)
Ch4 Left - (yellow)
Connect to factory speaker wire directly
Right - (brown)
Left - (green)
Left + (white)
Chassis ground (black)
4ga
PX1025.2
PX1025.4
PX1025.1
PX2025.1D
1-40A
2-30A
1-40A
2-40A
Cable SizeFuse SizeModel

Crunch PX1025.2 Specifications

General

Brand	Crunch
Model	PX1025.2
Category	Amplifier
Language	English

Summary

Before You Start

Safety Caution: Radio Reset Code

Alerts users to potential radio reset codes required after battery disconnection.

Power and Ground Cable Sizing

Emphasizes using the proper gauge power and ground cables for amplifier performance.

Installation Steps

Disconnect Negative Battery Terminal

Safely disconnect and secure the negative battery terminal before installation.

Run and Connect Cables

Route power, speaker, and RCA cables properly. Connect chassis ground and signal inputs.

Mount Amplifier and Connect Power

Mount amplifier securely, connect positive battery terminal with fuse, and re-connect negative terminal.

Speaker Connections

Connect speaker cables to output connectors based on stereo, bridged, or monoblock configuration.

Setup and Configuration

Input Mode and Crossover Settings

Configure input mode (MONO/STEREO) and crossover type (FULL/LPF/HPF) for optimal sound.

Frequency Adjustments

Adjust High Pass Filter (HPF) and Low Pass Filter (LPF) for smooth frequency transitions.

Bass Boost and Level Setting

Control bass enhancement and critically set amplifier output level to match source unit.