Kenwood KA 127 Manual

The Kenwood KA 127 is a high-performance stereo amplifier featuring 60W per channel output, multiple input sources, tone controls, headphone output, and remote control capability. Designed for audiophile-grade sound reproduction with low distortion and wide frequency response. 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 Guide 8. Remote Control Functions 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-power amplifier section, multiple input selector, tone controls, headphone output, remote sensor.

Feature	Description
Power Output	60W + 60W (8 ohms, 20Hz-20kHz)
Input Selector	CD, TUNER, AUX, PHONO, TAPE
Tone Controls	Bass ±10dB, Treble ±10dB
Headphone Jack	Standard 6.3mm stereo jack
Remote Control	Volume, input selection, power
Speaker Terminals	Binding post type for A/B speakers
Power Switch	Main power on/off
Volume Control	Motorized potentiometer with remote
Input Sensitivity	200mV (CD/AUX), 2.5mV (PHONO)
Signal-to-Noise Ratio	>100dB (CD input)

Installation

Unpack and inspect contents. Place on stable, level surface with adequate ventilation.

Connect speakers: Use speaker wire to connect to A/B speaker terminals.
Connect audio sources: Use RCA cables for CD player, tuner, aux devices.
Connect turntable: Use PHONO input for magnetic cartridge turntables.
Plug into AC power outlet.

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

First-Time Setup

Power on amplifier; verify all connections are secure.

Select input source: Rotate INPUT SELECTOR to desired source.
Adjust volume: Start with volume at minimum, gradually increase.
Set tone controls: Begin with flat response (center position).
Speaker selection: Choose A, B, or A+B for connected speakers.

CAUTION! Avoid turning volume to maximum immediately to prevent speaker damage.

Specifications

Power Output: 60W + 60W (8 ohms, 20Hz-20kHz, 0.07% THD)
Frequency Response: 10Hz-100kHz (+1dB, -3dB)
Total Harmonic Distortion: 0.07% (rated power)
Input Sensitivity/Impedance: CD/AUX: 200mV/47kΩ, PHONO: 2.5mV/47kΩ
Signal-to-Noise Ratio: 100dB (CD), 80dB (PHONO)
Tone Control Range: Bass ±10dB at 100Hz, Treble ±10dB at 10kHz
Power Requirements: 120V AC, 60Hz, 200W
Dimensions: 440mm (W) x 130mm (H) x 330mm (D)
Weight: 8.5kg

Controls and Settings

Front Panel: POWER, INPUT SELECTOR, VOLUME, BASS, TREBLE, SPEAKER SELECTOR, HEADPHONE JACK.

Rear Panel: AC input, speaker terminals (A/B), input jacks (CD, TUNER, AUX, PHONO, TAPE), remote sensor.

Input Selection: Rotate knob to select source (CD, TUNER, AUX, PHONO, TAPE). Tone Controls: Bass and treble knobs for frequency adjustment. Speaker Selection: A, B, or A+B for multiple speaker setups. Volume Control: Motorized potentiometer with remote operation.

Connecting Devices

Audio Sources: CD player, tuner, aux devices, turntable, tape deck.

Turn off amplifier before connecting devices.
Use quality RCA cables for audio connections.
Connect turntable to PHONO input only.
Match left/right channels correctly (red/white).
Connect speakers observing polarity (+/-).

Tip: Use speaker wire of adequate gauge for your speaker distance.

Operation Guide

Basic operation procedures for optimal performance.

Power on: Press POWER button; wait for relay click.
Source selection: Rotate INPUT SELECTOR to desired source.
Volume adjustment: Start low, increase gradually to desired level.
Tone adjustment: Use BASS and TREBLE controls to suit listening preference.
Headphone use: Insert headphones; speakers automatically mute.
Multiple speakers: Select A, B, or A+B for different speaker combinations.

WARNING! Do not operate without proper load (speakers connected).

Remote Control Functions

Remote control operation for convenient access.

Button	Function
POWER	Turns amplifier on/off
VOLUME +/-	Increases/decreases volume level
MUTE	Temporarily mutes audio output
CD/TUNER/AUX/PHONO	Direct input source selection
SPEAKER A/B	Selects speaker output

Battery: Use two AAA batteries; replace when remote response weakens.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior; compressed air for vents.

CAUTION! Do not use liquid cleaners; avoid moisture contact. Keep in well-ventilated area.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Kenwood Corporation. All trademarks property of their respective owners. For technical support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord/outlet	Check power connection; verify outlet function.
No sound	Input selection/volume	Verify input source; check volume level; ensure speakers connected.
Distorted sound	Overload/speakers	Reduce volume; check speaker impedance compatibility.
One channel silent	Cables/connections	Check RCA cables; verify speaker connections.
Remote not working	Batteries/obstruction	Replace batteries; ensure clear path to sensor.
Hum or noise	Grounding/cables	Check ground connections; use shielded cables.

Service: Contact authorized Kenwood service center for internal repairs.