Kenwood KR-9400

Kenwood KR-9400 AM/FM Stereo Receiver

Thr Kenwood KR-9400 stands as one of the truly great stereo receivers of the world, meeting the demands of th emost critical purist with the power, performance, and flexibility usually found only in the most expensive of separate components. The KR-9400 is the culmination of years of research and development on the part of Kenwood's engineering team, who have designed this very special unit with but one purpose in mind; to achieve the highest possible performance, regardless of cost.

A masterpiece of engineering with features never before incorporated in a stereo receiver.

Unique Kenwood Triple-Function Meter converts from Signal Strength Meter to Multipath detector to Deviation Meter at the touch of a button.

New Tape-Through Circuit permits tape-to-tape dubbing while you listen to another program source

New kenwood Injection Circuit mixes sound from any source into tape-to-tape dubbing

Triple Tone Controls provide full Bass, Treble, and Mid-range tonal compensation, with Defeat Switch for completely flat response.

Phase-Lock-Loop MPX Circuit; delivers exceptional FM-stereo separation for vivid directionality

Dolby FM Switch ; provides for the addition of a Dolby FM Adapter for best reception of Dolbyized FM broadcasts.

The Tuner Section

Famous the world over for the exceptional performance of its tuners, Kenwood outdoes its own reputation with the superb performance of the AM,FM and FM-stereo tuner section of the KR -9400

The FM Front End. To achieve the theoretical limit in FM sensitivity (1,7 µV), the KR-9400 incorporates an insulated dual-gate MOS-FET, combined with four separate tuned circuits. The extremely linear input of the r.f. stage is virtually impervious to cross-modulation and other forms of overload distortion.

The FM-IM Section. The high alternate channel selectivity (*) dB) and the remarkable capture ratio (1,3 dB) of the KR-9400 are the direct result of the permanently aligned solid state i.f. filter, a multi-function IC and five bi-polar transistors in the i.f. stage.

The Phase-Lock Loop Stereo Multiplex Decoder Section.

The kR-9400 provides extremely high FM-stereo separation throughtout the audio spectrum, thanks to the newly  developed phase-lock-loop IC circuit incorporated in the stereo FM decoder section, achieving more than 45 dB separation at 1 kHz; better than 35 dB at all frequencies from 30 Hz to 10 kHz.

The amplifier Section

The KR-9400 is the most powerful stereo receiver Kenwood has ever built, delivering a minimum of 120 watts of contiuous power per channel into 8 ohms speakers, both channels driven, 20 Hz to 20 kHz, with no  more thn 0,1% Total Harmonic Distortion

Direct-Coupled, Pure Complementary Symmetry Output Circuit

Kenwood;s advanced engineering eliminates the coupling capacitor between  output and speakers, so no distorting element stands  between you and the music. As a result you enjoy flat frequency response from ultra-lows to highest highs, a high damping factor (50 at 8 ohms), faithful bass response throughout the audio spectrum.

Large Power Transformer, Oversize Heat Sinks. A cool-running power transformer and massive heat sinks form the heart of a dual positive-negative power supply to the high-output transitors stages. This nocompromise design assures safe, cool operation even under continuous full-power output.

ASO protection Circuit. Kenwood 's "Area of Safe Operation" protection circuit will not interrupt your listening as long as the KR-9400 is operating within safe limits.shopuld those limits be exceeded, however, the sensitive electronic circuit with relay instantly disengages speakerrs.

Unique " Tape-Through" Circuit. The double tape monitoring facilities of the KR-9400 permit recording simultaneously onto two tape decks or dubbing from ona deck to the other. A unique "Tape-Through" cicruit carries recording convenience a step further by permitting the dubbing process to continue uninterrupted, even while the KR-9400 is being used to play another program source. Its's like owing two stereo systems in one.

The Preamplifier Section

The precision  equalizer-phono preamplifier section of the KR-9400 uses low-noise metal-encapsulated transistors to deliver an exceptionally high Signal-to-Noise ratio and assure utmost circuit reliability. Up to 300 mV (P-P) of input signal can be accomodated at less than 0,1% total harmonic distrotion, from a mere 2,5 mV phono input sensitivity.

Specifications

FM Tuner Section

Usable Sensitivity (IHF):  1,7 µV

Quieting Slope ( at 5 µV / 10 µV / 50 µV):  56 dB / 63 dB/ 72 dB

Signal-to-Noise Ratio:  72 dB

Capture Ratio (IHF):  1,3 dB

Selectivity Alt. Ch (IHF):  80 dB

Stereo Separation ( at 1 kHz / 10 kHz):  45 dB / 35 dB

Total Harmonic Distortion:

Mono :  0,3%

Stereo :  0,5%

Image Rejection Ratio:  80 dB

IF RejectionRatio:  100 dB

Harmonic Spurious Rejection:  90 dB

AM Suppression:  55 dB

Sub-Carrier Suppression:  62 dB

Antenna Impedance:  300 Ω balanced; 75 Ω unbalanced

AM Tuner Section

Uasble Sensitivity (IHF):  15 µV

Signal-to-Noise Ratio:   50 dB

Selectivity (IHF):  35 dB

Image Rejection Ratio:  70 dB

IF Rejection Ratio:  70 dB

Main Amplifier Section

Power Output: 120 watts per channel

Intermodulation Distortion:  0,1%

Preamplifier Section

Input Sensitivity/Impedance

Phono 1 and 2:  2,5 mV / 50 k Ω

Aux, Tape Play A, B:  150 mV/50 k Ω

MIC :  2,5 mV / 50 k Ω

Hum and Noise

Phono 1 and 2 :  70 dB

Aux and Tape :  93 dB

Mic :  65 dB

Output Voltage/Impedance

Tape Rec A, B

PIN :  150 mV/ 100 Ω

DIN :  30 mV/80 k Ω

Tone Controls

Bass :  ±10 dB at 100 Hz

Midrange :  ±10 dB at 800 Hz

Treble :  ±10 dB at 10 kHz

Loudness

At 100 Hz :  8 dB

At 10 kHz :  5 dB

Filters

High Filter:  12 dB/oct turnover 7 kHz

Low Filter:  12 dB/oct turnover 100 Hz

Power Requirements:  110/120 V 50/60 Hz

Power Consumption:  415 watts at full power; 60 watts at no signal

Dimensions (W x H x D):  21-15/16" x 6-9/16" x 15-9/16"

Weight:  45,4 lbs