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Kenwood KAC-7251 User Manual

Kenwood KAC-7251
14 pages
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Kenwood KAC-7251 Specifications

Audio Output IconAudio Output
rated power output (4Ω 20Hz~20kHz)150W x 2 (0.08% THD)
power output (4Ω DIN45324, +B=14.4V)150W x 2
power output (2Ω 1kHz)230W x 2 (0.8% THD)
bridged power output460W x 1 (0.8% THD)
max power output800W x 1
Filters IconFilters
low-pass filter50~200Hz (18dB/oct.)
high-pass filter150Hz (12dB/oct.)
bass boost circuit (KAC-7251)OFF/+6/+9/+12dB
bass boost circuit (KAC-7201)OFF/+12dB
Performance Metrics IconPerformance Metrics
frequency response (0dB, -3dB)5Hz~50kHz
signal to noise ratio100dB
sensitivity (max.)0.2V (Rated Output)
sensitivity (min.)5.0V (Rated Output)
input impedance10kΩ
General Specifications IconGeneral Specifications
operating voltage14.4V (11V~16V allowable)
current consumption (1kHz 10%THD)43A
installation size (W x H x D)285 x 57 x 305 mm
weight3.32kg

Summary

Safety Precautions

General Safety Warnings

Essential advice to prevent injury, fire, or unit damage during operation.

Unit Care and Protection

Guidance on cleaning, battery usage, and the unit's protection features.

Included Accessories

List of accessories provided with the amplifier.

Installation Guide

Installation Precautions and Locations

Critical advice on choosing installation spots and ensuring safe operation.

Amplifier Controls

LPF Frequency Control

Sets the cutoff frequency for low-pass filtering.

Filter Switch

Selects high-pass, low-pass, or no filtering for speaker outputs.

Bass Boost Switch

Controls the bass boost level manually or via remote.

Operation Switch

Selects the amplifier's operating mode (Stereo or Mono).

Input Sensitivity Control

Sets input sensitivity based on the center unit's output level.

Remote Bass Boost Control (KAC-7251)

Allows Bass Boost adjustment via remote for specific models.

Indicator Status

Power Indicator

Visual indicator for power status; absence may signal protection.

Protection Function Triggers

Lists specific conditions that activate the protection circuit.

Connection Details

Terminal Names and Descriptions

Identifies and describes all input/output terminals on the amplifier.

Audio Input and Speaker Output Wiring

Explains how to connect speakers and audio sources.

Installation and Wiring Process

Installation Procedure Steps

Step-by-step guide for installing the unit in a vehicle.

Wiring Guidelines and Safety

Best practices and warnings for wiring the amplifier.

Speaker Selection Criteria

Advice on choosing speakers based on impedance and power ratings.

Connection Methods

RCA and Speaker Level Input Wiring

How to connect audio sources using RCA or speaker level inputs.

Remote Control Connection

Connecting the remote control for KAC-7251 models.

Speaker and Power Wire Connection

Speaker Wire Configurations

Illustrates stereo and bridged speaker wiring configurations.

Power Wire Installation

Details on connecting the main power and ground wires.

System Configuration Examples

2-Channel System Setup

Diagram showing a basic stereo amplifier setup.

High-Power Bridged System

Diagram for a bridged stereo amplifier setup for higher power.

2-Channel + Subwoofer Setup

Diagram for a system combining main speakers and a subwoofer.

Tri-mode System

Principle of Tri-mode Operation

Diagram and principle for tri-mode operation with crossover filters.

Troubleshooting Guide

No Sound or Sound Quality Issues

Potential causes and solutions for no sound or distorted audio.

Remote Controller Not Functioning

Troubleshooting steps for when the remote controller does not work.

Technical Specifications

Audio Section Specifications

Detailed technical specifications for audio performance.

General Unit Specifications

General operating parameters, dimensions, and weight.

Warranty Information

Limited Warranty Coverage and Exclusions

Details of the limited warranty coverage, exclusions, and duration.

How to Obtain Warranty Service

Instructions on how to get the product serviced under warranty.

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