In Phase IPA 4001D - User Manual

Questions and Answers

A
Alison MitchellAug 4, 2025
How to fix no audio on my In Phase Car Receiver?
- J
  Jill JohnsonAug 4, 2025
  If your In Phase Car Receiver has no audio, it could be due to several reasons: low or no remote turn-on connections, a blown fuse, disconnected power wires, or blown or disconnected speakers. Check the remote turn-on voltage at the amplifier and head unit. Replace any blown fuses with new fast-blow fuses. Check butt splices or solder joints, and inspect the ground and battery connections. Use a VOM or DVM to measure speaker coil impedance and check speaker wiring connections.
J
Jacqueline OsborneAug 8, 2025
Why is there a whining noise on my In Phase IPA 4001D Car Receiver audio when the engine is running?
- D
  dbakerAug 8, 2025
  If you are experiencing a whining noise on the audio of your In Phase Car Receiver when the engine is running, it's likely that the amplifier is picking up alternator noise. To resolve this, try installing an in-line noise filter on the head unit's power wire. Also, check the alternator routing diodes or voltage regulator for proper operation, and inspect all grounds, battery voltage, and RCA cables.
P
pdownsAug 13, 2025
What to do if my In Phase IPA 4001D has distorted audio?
- M
  Micheal JohnsonAug 13, 2025
  If your In Phase Car Receiver is producing distorted audio, it could be due to the input sensitivity not being set correctly or damaged speaker cones, or even low turn-on voltage. You should check the adjustment procedure step by step. Inspect each speaker for damage and repair or replace any damaged components. Also, refer to the head unit owner's manual.
R
Richard BradleyAug 16, 2025
Why is there a ticking noise on my In Phase IPA 4001D audio when the engine is running?
- R
  Roy AlexanderAug 16, 2025
  If you are experiencing a ticking noise on the audio of your In Phase Car Receiver when the engine is running, the amplifier might be picking up radiated spark noise. To fix this, check the RCA audio cable and install an in-line noise filter on the head unit's power wire. Also, inspect the spark plug wires.
A
Amanda RiversAug 20, 2025
What to do if the external fuse keeps blowing on my In Phase Car Receiver?
- J
  Jenny CowanAug 20, 2025
  If the external fuse keeps blowing in your In Phase Car Receiver, it indicates incorrect wiring or a short circuit. Refer to the electrical installation instructions and carefully check each installation step.
X
xbuchananAug 26, 2025
Why is the audio level low on my In Phase IPA 4001D Car Receiver?
- A
  amandaloweAug 26, 2025
  If the audio level is low on your In Phase Car Receiver, the mute circuit on the head unit might be activated. Check the electrical system for low voltage and inspect the ground connection.
S
Steven RossAug 29, 2025
Why does the audio lack bass on my In Phase IPA 4001D Car Receiver?
- F
  Faith SmithAug 30, 2025
  If the audio lacks bass on your In Phase Car Receiver, it could be because the speakers are wired with the wrong polarity, causing cancellation of bass frequencies. Check the polarity of the wires from the amplifiers to each speaker as defined by the system design. Also, check the battery voltage at the amplifier during operation.

Summary

Specifications

General Safety Instructions

INSTALLATION

MOUNTING:

Details the process of physically mounting the amplifier unit, including drilling and screw usage.

INSTALLATION DIAGRAM

Illustrates the physical installation of the amplifier, showing screw placement and orientation.

Features

Speaker Wiring

Bridged Mono Wiring

POWER SUPPLY CONNECTIONS

RECOMMENDED POWERWIRE

Specifies the appropriate wire gauge for power connections based on current draw.

POWER

Guides on running and connecting the power wire from the battery to the amplifier.

GROUND

Explains the importance and procedure for establishing a proper ground connection for the amplifier.

REMOTE TURN-ON

Describes how to connect the remote turn-on wire to activate the amplifier with the source unit.

OPERATION

CONTROL AND CROSSOVER

Explains the specific controls like RCA input, level, crossover, subsonic, bass boost, and phase.

TROUBLE SHOOTING GUIDE.

In Phase IPA 4001D Specifications

General

Channels	1
RMS power at 4 Ohms	400W
RMS power at 1 Ohm	1000W
Signal-to-noise ratio	>90dB
Input sensitivity	0.2V - 6V
Damping factor	>150
Fuse rating	40A x 2
Power Output	1000W

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