Kenwood KR-A4040 Manual

The Kenwood KR-A4040 is a high-performance stereo receiver featuring AM/FM tuner, 40 watts per channel output, multiple audio inputs, phono input for turntables, tape monitoring, loudness control, and tone adjustments. With its classic design and robust construction, it delivers exceptional audio quality for home stereo systems. Below are key sections covering features, installation, operation, specifications, and troubleshooting.

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

Features at a Glance

Key components: AM/FM stereo tuner, Phono input, Tape monitor, Loudness control, Bass/Treble adjustments, Speaker selector.

Feature	Description
Power Output	40 watts per channel (RMS, 8 ohms)
Tuner Section	AM/FM stereo with manual tuning
Phono Input	MM cartridge compatible
Tape Monitor	For recording and playback monitoring
Loudness Control	Enhances bass at low volume levels
Tone Controls	Bass and treble adjustments
Speaker Selector	A/B speaker system selection
Headphone Jack	For private listening
Input Selector	Phono, Tuner, Aux, Tape
Power Switch	Main power on/off control

Installation

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

Connect speakers: Use speaker wire to connect to A/B speaker terminals.
Connect audio sources: Phono for turntable, Aux for CD player, Tape for deck.
Connect antenna: AM loop antenna and FM wire antenna.
Plug into AC power outlet.

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

First-Time Setup

Power on receiver; follow initial setup procedure.

Speaker connection: Connect speakers to A or B terminals.
Antenna setup: Position AM loop antenna and extend FM antenna.
Source connection: Connect turntable to Phono, CD player to Aux.
Volume control: Set to minimum before power on.
Tuning: Select FM or AM band and tune to desired station.

CAUTION! Ensure all connections are secure before powering on.

Specifications

Power Output: 40W + 40W (RMS, 8 ohms)
Frequency Response: 20Hz - 20kHz
Total Harmonic Distortion: 0.08%
Input Sensitivity: Phono: 2.5mV, Aux: 150mV
Signal-to-Noise Ratio: Phono: 70dB, Aux: 85dB
Tuner Section: FM/AM with manual tuning
Inputs: Phono, Aux, Tape
Outputs: Tape Rec, Speakers A/B, Headphone
Power Requirements: 120V AC, 60Hz
Dimensions: 17-1/4" W x 5-1/4" H x 13-3/8" D

Controls and Settings

Front panel controls: Power Switch, Input Selector, Volume, Balance, Bass, Treble, Loudness, Speaker Selector.

Main Controls: Input Selector (Phono/Tuner/Aux/Tape), Volume Control, Balance Control, Tone Controls (Bass/Treble), Loudness Switch, Speaker Selector (A/B/Off).

Tuner Controls: Band Selector (FM/AM), Tuning Knob, Stereo Indicator. Tape Controls: Tape Monitor Switch. Additional: Headphone Jack, Power Indicator.

Connecting Audio Sources

Phono: Connect turntable with ground wire. Aux: Connect CD player or other line-level source. Tape: Connect tape deck for recording/playback.

Turn off receiver before making connections.
Match cables to appropriate inputs (RCA connectors).
Ensure phono ground wire is connected for turntable.
Select appropriate input source on front panel.

Tip: Use quality cables and keep signal cables away from power cords.

Tuner Operation

AM/FM stereo tuner with manual tuning.

Select band: Choose FM or AM using band selector.
Tune station: Rotate tuning knob until station is clear.
Stereo reception: FM stereo indicator lights when receiving stereo broadcast.
Fine tuning: Adjust tuning knob for best reception.
Antenna adjustment: Position FM antenna for best signal.

Note: FM reception may require antenna adjustment for optimal performance.

Tape Deck Operation

Tape monitor function for recording and playback.

Connect tape deck to Tape Play and Rec jacks.
Select Tape input for playback.
Engage Tape Monitor switch to monitor tape recording.
For recording: Select source to be recorded, engage Tape Monitor.
Adjust recording levels using source volume control.

WARNING! Do not leave tapes in deck when not in use.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Keep away from moisture and heat sources.

CAUTION! Do not use liquid cleaners or aerosols. Avoid blocking ventilation openings.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Speaker connections/selector	Check speaker wires; ensure speaker selector is on A or B
Hum or noise	Ground connection/interference	Check phono ground; move away from interference sources
Poor FM reception	Antenna position	Adjust FM antenna; ensure proper connection
One channel silent	Balance control/cables	Check balance control; verify cable connections
Distorted sound	Overload/speakers	Reduce volume; check speaker impedance

Service: Contact authorized Kenwood service center for repairs.