Kenwood A701A Manual

The Kenwood A701A is a high-performance audio amplifier featuring advanced amplification technology, multiple input/output options, tone controls, speaker protection circuitry, and remote control compatibility. With power output of 100W per channel, built-in phono stage, bass/treble adjustments, headphone jack, and comprehensive connectivity options. Powered by 230V AC, 50Hz. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation Modes 8. Protection Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-power amplifier circuitry, Remote Control, Multiple audio inputs, Speaker outputs, Headphone jack, Tone controls.

Feature	Description
Power Output	100W per channel (8 ohms)
Input Selector	CD, TUNER, PHONO, AUX, TAPE
Phono Input	MM cartridge compatible
Headphone Jack	6.3mm stereo jack for private listening
AC Power Input	230V AC, 50Hz power connection
Tone Controls	Bass and treble adjustment ±10dB
Loudness	Compensates for low volume listening
Balance Control	Left/right channel balance adjustment
MUTE	Instant audio muting
POWER	Main power on/off switch

Installation

Unpack and inspect contents. Place on stable, well-ventilated surface.

Connect speakers: Use speaker terminals A or B, ensuring correct polarity.
Connect audio sources: Use appropriate input jacks for CD player, turntable, tuner, etc.
Connect tape deck: Use TAPE IN/OUT for recording and playback.
Plug into AC power outlet.

WARNING! Ensure proper ventilation; do not block cooling vents. Use correct speaker impedance.

First-Time Setup

Power on amplifier; check all connections.

Select input source: Turn INPUT SELECTOR to desired source (CD, PHONO, etc.).
Set volume: Start with volume at minimum, gradually increase to desired level.
Adjust tone: Use BASS and TREBLE controls to suit listening preferences.
Speaker selection: Choose SPEAKER A or B as required.

CAUTION! Always turn volume down before switching inputs or powering off.

Specifications

Power Output: 100W + 100W (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.08% (1kHz, rated power)
Frequency Response: 10Hz-100kHz (+0/-3dB)
Input Sensitivity: PHONO: 2.5mV, LINE: 150mV
Signal-to-Noise Ratio: PHONO: 80dB, LINE: 100dB
Tone Control: Bass: ±10dB at 100Hz, Treble: ±10dB at 10kHz
Power Requirements: 230V AC, 50Hz
Dimensions: 430mm (W) x 150mm (H) x 380mm (D)
Weight: 12.5kg

Controls and Settings

Front Panel: POWER, INPUT SELECTOR, VOLUME, BASS, TREBLE, BALANCE, LOUDNESS, MUTE, SPEAKER A/B.

Remote: POWER, VOLUME UP/DOWN, MUTE, INPUT SELECTION, TONE controls.

Input Selection: CD, TUNER, PHONO, AUX, TAPE. Tone Controls: Bass and treble adjustment. Loudness: Enhances bass at low volumes. Balance: Adjusts left/right channel balance. Speaker Selection: A, B, or A+B speaker outputs.

Connecting Devices

Audio Inputs: PHONO, CD, TUNER, AUX, TAPE. Speaker Outputs: A and B terminals.

Turn off amplifier before connecting devices.
Use high-quality audio cables for best performance.
Connect turntable to PHONO input only.
Ensure speaker wires are securely connected and not shorting.

Tip: Keep audio cables away from power cords to minimize interference.

Operation Modes

Supports various audio sources and listening modes.

Source Selection: Rotate INPUT SELECTOR to desired source.
Volume Control: Adjust VOLUME knob for desired listening level.
Tone Adjustment: Use BASS and TREBLE controls to enhance sound.
Loudness: Engage for better bass response at low volumes.
Mute: Press MUTE for instant silence.
Speaker Selection: Choose between SPEAKER A, B, or both.
Headphone Use: Plug headphones into front panel jack.

WARNING! Do not operate at maximum volume for extended periods.

Protection Features

Overload Protection: Automatic shutdown during excessive current. Thermal Protection: Prevents overheating. DC Protection: Speaker protection from DC offset. Short Circuit Protection: Prevents damage from speaker wire shorts.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Clean controls with contact cleaner if necessary.

CAUTION! Do not use chemical cleaners or solvents. Keep away from moisture and extreme temperatures.

Regulatory Information

CE compliant; meets European safety and EMC standards. Copyright © 2006 Kenwood Corporation; trademarks of Kenwood Corporation. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Power/connections	Check power connection; ensure speakers selected; verify input source.
Distorted sound	Overload/settings	Reduce volume; check speaker impedance; inspect cables.
One channel not working	Balance/cables	Check balance control; inspect audio cables; test with different source.
Hum or noise	Grounding/interference	Check ground connections; separate audio and power cables; use quality cables.
Protection circuit active	Overload/short circuit	Turn off and check speaker connections; allow to cool if overheated.

Reset: Turn off and unplug for 30 seconds if protection circuit activates.

Service: Contact authorized Kenwood service center; www.kenwood.com