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Kenwood KA-907 User Manual

Kenwood KA-907
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HIGH
SPEED
DC
INTEGRATED
AMPLIFIER
KA-907
INSTRUCTION
MANUAL
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Kenwood KA-907 Specifications

General IconGeneral
BrandKenwood
ModelKA-907
CategoryAmplifier
LanguageEnglish

Summary

INTRODUCTION

FOR YOUR RECORDS

Record serial number for service.

AFTER UNPACKING

Inspect for shipping damage and retain packing materials.

IMPORTANT!

U.S.A AND CANADA OPERATION

Units for USA/Canada operate on 120V AC only.

OTHER COUNTRIES OPERATION

Units for other countries have AC voltage selector.

AC VOLTAGE SELECTION

INSTALLATION PRECAUTIONS

WARNING: RAIN OR MOISTURE

Warning against exposure to rain or moisture.

FEATURES

HIGH SPEED AMPLIFIER DESIGN

Explains the high-speed amplifier design and slew rate.

ULTIMATE DC AMPLIFIER

DC coupling for low-frequency quality and stability.

INDEPENDENT DUAL POWER SUPPLIES

Dual power supplies for channel independence and preamp stability.

HIGH PERFORMANCE PHONO EQUALIZER

DC equalizer with dual-gate FETs for RIAA matching.

HIGH-PERFORMANCE MC HEAD AMP

MC head amp with symmetrical push-pull circuits.

PHONO CARTRIDGE MATCHING

MM/MC cartridge compatibility and impedance selection.

TONE CONTROL WITH TURNOVER SELECTOR

Adjustable bass/treble turnover frequencies and tone defeat.

LOUDNESS CONTROL FEATURES

Compensates for sound field and aural sensitivity.

SPECIAL TAPE-THROUGH SYSTEM

Tape dubbing feature without tying up the system.

SPEAKER SWITCHING SYSTEM

Wired for minimum resistance to maintain damping factor.

DUAL SPEAKER OPERATION

Supports one or two pairs of speakers, selectable for individual use.

SYSTEM CONNECTION DIAGRAM

AC OUTLETS

EUROPEAN UNITS NOTE

European units do not have AC outlets.

SYSTEM CONNECTIONS

SPEAKERS CONNECTION

How to connect speaker systems to terminals A and B.

TURNTABLES CONNECTION

Connecting turntables to PHONO 1 and PHONO 2 inputs.

TUNER CONNECTION

Connecting FM/AM tuners to the TUNER input jacks.

AUX JACKS CONNECTION

Connecting other high-level signal sources.

TAPE DECKS CONNECTION

Connecting tape decks for playback and recording.

CONTROLS, INDICATORS AND CONNECTORS

POWER SWITCH AND INDICATOR

Turns power on/off, indicator shows status.

SPEAKERS SWITCH

Selects speaker outputs (OFF, A, B, A+B).

TONE CONTROLS

Adjusts bass/treble response and turnover frequencies.

VOLUME CONTROL

Adjusts left/right channel volume simultaneously.

ATTENUATOR SWITCH

Temporarily reduces volume or turns off sound.

TAPE DUBBING SWITCH

Facilitates copying tapes between two decks.

TAPE MONITOR SWITCH

Monitors recording progress or plays back tape.

CONTROLS, INDICATORS AND CONNECTORS

PHONO SELECTOR

Selects PHONO 1 (MM/MC) or PHONO 2 (MM) input.

INPUT SELECTOR SWITCH

Selects the desired program source (TUNER, PHONO, AUX).

FILTER SWITCHES

SUBSONIC and HIGH filters to reduce unwanted signals.

PHONES JACK

Connects stereo headphones for private listening.

DC COUPLED SWITCH

Enables/disables DC coupling for flat response down to zero Hz.

DC COUPLED INDICATOR

Indicates stabilization status of DC coupling circuits.

BALANCE CONTROL

Balances left and right channels for stereo imaging.

LOUDNESS CONTROL SPECIFICATIONS

Compensates for bass loss at low volumes.

MODE SWITCH

Selects STEREO, REVERSE, or MONO playback.

OPERATING INSTRUCTIONS

INITIAL SETUP

Recommended initial control settings before operation.

TUNER OPERATION

Steps for operating the tuner.

TURNTABLE OPERATION

Steps for operating turntables.

AUX OPERATION

Steps for operating components connected to AUX.

TAPE DECKS PLAYBACK AND MONITORING

Instructions for tape playback and monitoring.

RECORDING WITH ONE TAPE DECK

Instructions for recording with one tape deck.

RECORDING WITH TWO TAPE DECKS

Instructions for recording with two tape decks.

OPERATING INSTRUCTIONS

TAPE-TO-TAPE DUBBING

Duplicating tapes between two tape decks.

THE THROUGH CIRCUIT

Listening to other sources while tape dubbing.

OPERATING INSTRUCTIONS

PRE OUTPUT/POWER IN JACKS

Explains the PRE OUT/POWER IN jacks for system expansion.

POWER IN JACKS PRECAUTIONS

Warnings about DC voltage and protection circuits.

SAFETY PRECAUTIONS

CLEANING PRECAUTIONS

How to clean the amplifier cabinet safely.

VENTILATION HOLES IMPORTANCE

Importance of keeping ventilation holes clear.

MODIFICATIONS AND SERVICE WARNINGS

Warnings against internal modification and servicing.

HEXAGONAL KEY NOTE

Notes the importance of the hexagonal wrench for service.

POWER CORD SAFETY

Precautions for handling the power cord to avoid hazards.

SPEAKER SYSTEM PROTECTION

Preventing speaker damage from surges or excessive power.

IN CASE OF DIFFICULTY

PLAYBACK TROUBLESHOOTING

Troubleshooting guide for common playback issues.

PHONO PLAYBACK TROUBLESHOOTING

Troubleshooting guide for phono playback issues.

IN CASE OF DIFFICULTY

INDICATOR TROUBLESHOOTING

Troubleshooting using power/DC indicators.

HANDLE INSTALLATION

BLOCK DIAGRAM

TECHNICAL DESCRIPTION

DC POWER AMPLIFIER CHARACTERISTICS

Explains the benefits and characteristics of DC amplification.

SPECIFICATIONS

POWER OUTPUT SPECIFICATIONS

Details the amplifier's power output ratings.

PHONO INPUT TO SPEAKER OUTPUT

Describes performance from phono input to speaker.

TRANSIENT RESPONSE SPECIFICATIONS

Specifications for rise time and slew rate.

FREQUENCY RESPONSE (DC COUPLED ON)

Frequency response with DC coupling active.

SPEAKER IMPEDANCE SUPPORT

Supported speaker impedances.

POWER IN SENSITIVITY/IMPEDANCE

Sensitivity and impedance for Power IN jacks.

INPUT SENSITIVITY/IMPEDANCE

Sensitivity and impedance for various inputs.

SIGNAL TO NOISE RATIO (IHF. A)

Noise levels for different input types.

MAX INPUT LEVEL FOR PHONO

Maximum input levels for phono inputs.

OUTPUT LEVEL/IMPEDANCE

Output levels and impedances for tape rec and pre-out.

PHONO FREQUENCY RESPONSE

Phono frequency response curve.

TONE CONTROL SPECIFICATIONS

Bass and treble control ranges and turnover frequencies.

LOUDNESS CONTROL SPECIFICATIONS

Loudness control boost levels and frequencies.

SUBSONIC FILTER SPECIFICATIONS

Subsonic filter characteristics.

HIGH FILTER SPECIFICATIONS

High filter characteristics.

GENERAL SPECIFICATIONS

General specifications like power consumption and dimensions.

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