Kenwood KR-6340 Vintage Stereo Receiver – Professionally Restored – 1-Year Warranty

$999

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  • Professionally inspected and serviced by HQaudios technicians
  • Fully tested for clean, stable, and reliable operation
  • Warm vintage sound with strong musical character
  • All major functions tested before shipment
  • Controls cleaned and treated for smooth operation
  • Carefully packed for safe delivery
  • Backed by our 1-Year HQaudios Warranty

1 in stock

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SKU: 1515QJKE4053 Categories: , ,

 

Kenwood KR-6340 Two-Four Vintage Receiver
Professionally Restored by HQaudios – Inspected & Tested – Backed by Our 1-Year Warranty

KEY HIGHLIGHTS
Classic Kenwood KR-6340 Two-Four Receiver
Selectable 2-Channel Stereo and 4-Channel Operation
40 Watts Per Channel in Stereo Mode at 8 Ohms
15 Watts Per Channel in 4-Channel Mode at 8 Ohms
Built-In RM and SQ Matrix Decoding
AM/FM Tuner, Phono and Auxiliary Source Selection
Amplifier, Power Supply, Controls and Signal Connections Serviced
Capacitors Inspected and Out-of-Spec Components Replaced
Final Functional and Listening Tests Completed
Backed by Our 1-Year HQaudios Warranty

PRODUCT OVERVIEW
The Kenwood KR-6340 is a vintage Two-Four receiver designed to provide traditional two-channel stereo listening as well as four-channel audio reproduction. Its amplifier architecture allows operation in either mode, providing a rated 40 watts per channel in two-channel stereo or 15 watts per channel in four-channel operation into 8-ohm loads across the 20 Hz to 20 kHz audio range.
The receiver includes built-in RM and SQ matrix decoding, an AM/FM radio tuner, phono and auxiliary source selection, and front-panel controls for adjusting the listening experience. Its distinctive Two-Four architecture makes it an interesting component for vintage Kenwood enthusiasts and collectors of early multichannel audio equipment.
HQaudios has completed an extensive service and restoration process on this receiver, covering the power supply, amplifier circuitry, capacitors, controls, signal connections, tuner, lighting, and general cleaning. The receiver was subsequently evaluated through functional operation and music playback testing.

HQAUDIOS RESTORATION & TESTING
Before Restoration
When we received this Kenwood KR-6340, we inspected its exterior condition and evaluated the major electrical, mechanical, and audio sections before beginning service.
Our initial inspection covered the power supply, amplifier boards, capacitors, transistors, circuit connections, solder joints, controls, audio inputs and outputs, speaker connections, AM/FM tuner, lighting system, and operating-voltage configuration.
These checks established the service areas to be addressed during the restoration process.
During Restoration
Capacitor Inspection & Replacement:
We inspected and measured capacitors in the relevant circuits. Deteriorated or out-of-spec capacitors identified during service were replaced with appropriately rated components.
Power Supply Service:
We inspected and serviced the power supply circuitry, including related components, wiring connections, and contact points.
Amplifier Board Service:
We inspected and serviced the main amplifier circuitry, addressing component and circuit issues identified during the restoration process.
Bias & DC Offset:
We checked the amplifier bias and DC offset and performed adjustments during service.
Circuit Board Cleaning:
We cleaned the circuit boards and inspected solder connections, addressing deteriorated joints identified during service.
Controls & Switches:
We cleaned and serviced the volume, balance, input selector, and related control switches to improve electrical contact and adjustment.
Audio Connections:
We inspected and cleaned the audio input/output connections, speaker terminals, and associated contact points.
AM/FM Tuner Service:
We inspected and serviced the tuner section and evaluated AM/FM reception during functional testing.
Lighting System:
We inspected the lighting and display sections and addressed lighting-related issues identified during service.
Internal Cleaning:
We removed accumulated dust and cleaned accessible internal surfaces, chassis areas, and related components.
Exterior Detailing:
We cleaned and detailed the front panel, control knobs, accessible exterior surfaces, and related hardware.
Voltage Configuration:
We inspected the receiver’s operating-voltage configuration during service.
After Restoration / Final Testing
Power-On Operation:
The receiver powered on and operated during final testing.
Audio Output:
Audio output was confirmed through the channels evaluated during the functional test.
Two-Four Channel Operation:
The receiver’s two-channel and four-channel operating functions were evaluated after service.
Input Selection:
The receiver’s source-selection and audio-input functions were evaluated using test signals.
Volume & Controls:
Control response and adjustment were evaluated during playback testing.
AM/FM Reception:
Both tuner bands were evaluated using available broadcast signals.
Speaker Outputs:
Speaker-output operation was checked in the receiver’s supported operating configurations.
Lighting & Display:
The receiver’s lighting and display operation were evaluated following service.
Extended Operation:
The receiver underwent extended operation testing to evaluate functional stability.
Final Listening Test:
The receiver was evaluated using real music playback following the restoration work.

CONDITION
Technical Condition
Power Supply:
Serviced and operating during the final power-on and functional evaluation.
Amplifier Sections:
Serviced, with audio output confirmed during post-service testing.
Capacitors:
Inspected and measured, with deteriorated or out-of-spec components identified during service replaced.
Bias & DC Offset:
Checked and adjusted during amplifier servicing.
Controls & Switches:
Cleaned and serviced, with response evaluated during the functional test.
Two-Channel / Four-Channel Operation:
Operating-mode functions evaluated after restoration.
Audio Inputs:
Source selection and signal operation evaluated during testing.
AM/FM Tuner:
Serviced and evaluated using radio reception.
Speaker Connections:
Cleaned and checked during output testing.
Lighting & Display:
Serviced and evaluated following restoration.
Operational Stability:
Extended operation and final music playback evaluations completed.
Cosmetic Condition
Exterior Surfaces:
Cleaned and detailed during HQaudios service.
Front Panel & Controls:
Exterior surfaces and accessible controls have received cosmetic cleaning and detailing.
Chassis:
Accessible surfaces cleaned during servicing.
Visual Reference:
Please review the actual product photographs for the receiver’s exterior appearance and visible cosmetic details.
Amplifier and Power Supply Serviced
Capacitor Inspection and Replacement Completed
Two-Channel / Four-Channel Functions Evaluated
Final Functional and Listening Tests Completed

SPECIFICATIONS
Brand: Kenwood
Model: KR-6340
Type: Two-Four AM/FM Receiver
Amplifier Configuration: Selectable 2-Channel Stereo / 4-Channel Operation
Factory Rated Stereo Output: 40 WPC into 8 Ohms, 20 Hz – 20 kHz, all channels driven
Factory Rated 4-Channel Output: 15 WPC into 8 Ohms, 20 Hz – 20 kHz, all channels driven
Rated THD: 0.8% at rated output into 8 Ohms
Frequency Response: 20 Hz – 20 kHz ±1 dB (Tuner, AUX, Tape Play)
Power Bandwidth: 20 Hz – 40 kHz
Damping Factor: 20 at 8 Ohms (4-channel operation)
Speaker Impedance: 4 – 16 Ohms
Phono Input Sensitivity: 1.5 mV / 100 kOhms
AUX Input Sensitivity: 150 mV / 50 kOhms
Tape Play Input Sensitivity: 150 mV / 50 kOhms
Tape Record Output: 150 mV / 100 Ohms (RCA)
Phono S/N Ratio: 60 dB
AUX / Tape Play S/N Ratio: 75 dB
FM Usable Sensitivity: 2.0 µV (IHF)
FM Frequency Response: 20 Hz – 15 kHz ±1.2 dB
AM Usable Sensitivity: 25 µV (IHF)
Built-In Decoding: RM and SQ Matrix
Input Selection: AM, FM, Phono, CD-4, AUX
Operating Modes: Mono, 2CH, RM, SQ, Discrete
Speaker Selection: A / B
Tone Controls: Bass ±10 dB at 100 Hz; Treble ±10 dB at 10 kHz
Power Consumption: 320 W at full power / 35 W at no signal (factory)
Dimensions: 21.8 W × 6.3 H × 14.2 D in
Weight: 33.0 lbs (factory net weight)

WHAT IS INCLUDED
1 Kenwood KR-6340 Two-Four Receiver
Only the items specifically listed above are included.

SHIPPING & PACKAGING
Your vintage audio equipment will be professionally packed by HQaudios using protective materials appropriate for its size, weight, and construction. Large or heavy items may be palletized and shipped by freight when required for safer transportation.

HQaudios Professional Shipping and Packaging

Please contact us before purchase for the most current availability information.

1-YEAR WARRANTY & CUSTOMER SUPPORT
Your purchase is backed by our 1-Year HQaudios Warranty. Our team provides support before and after your purchase. If you have questions about setup, operation, compatibility, or your order, please contact HQaudios for assistance.

MORE FROM HQAUDIOS
Need restoration, repair, a custom faceplate or wood case, speaker stands, or a trade-in option? Contact HQaudios for available services and package pricing.

HQaudios Vintage Audio Repair and Restoration

HQaudios Custom Audio Projects

 

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