Kenwood KX-700 cassette deck

Stereo cassette deck with Dolby noise reduction system

A state-of-the-art. Cassette deck with reel-to-reel quality featuring

Luxurious in every respect, the KX-700 combines reel-to-reel quality with cassette convenience. Its patented Dolby Noise Reduction System (Type B) virtually eliminates high frequency background noise without affecting high frequency signals. The superferrite record-and-play head, with its precision micro-gap, utilizes bias frequencies to optimum advantage for top quality reproduction, and a three-way Tape Selector permits a choice of the correct bias for Regular, Low Noise or Chromium Dioxide tapes. A measure of the unit's fine performance is indicated by a few of its excellent specs.

 

Special features

Patented Dolby Noise Reduction System - will filter out high frequency background noises (hiss sounds) inherent in the recording process, or will play back pre-recorded Dolbyized tapes with an almost silent background, improving Signal-to-Noise Ratio by approximately 10 dB for all tape types.

Super-Ferrite Core head - is made of high density and extremely hard ferrite magnetic material to provide exceptional long life. The material permits the fabrication of an extremely narrow, precise head gap that allows bias frequencies to be utilized to optimum advantage in the recording and reproduction of high frequency sounds. The unit also incorporates an erase head.

Three-Way Tape Selection Push-Button Switch - permits a choice of the correct bias frequency for Regular, Low Noise or Chromium Dioxide Tapes, providing maximum flexibility in achieving the finest sound reproduction from each tape type.

Slide Lever Volume Controls - two separate left and right slide Lever Controls for Record and Play offer easy accurate level adjustment.

Two Large VU Meters - one for each channel are easy to read for accurate level check

Three Digit Counter - with re-set button provides tape location at a glance

Piano Key Controls - provide feather-touch control for Eject; Stop; Reverse; Play, Fast Forward, Record and Pause. The Pause function is particularly convenient for tape editing

Input/Output Terminals - provide maximum convenience, with 2 Microphone jacks, Phone jack for 8 Ω  stereo headphones; DIN connector, and Line-IN/Line-Out Terminals.

Low-Distortion, High S/N Preamp - use of 2 FETs in the first stage of preamplification and 14 silicon transistors having low noise, high gain characteristics assure low distortion and a high Signal-to-Noise Ratio.

Automatic Stop - at tape's end in any mode recording, playback fast forward, or reverse, the KX-700 will automatically stop, with the pinch roller lifted away from the capstan to prevent any capstan displacement.

 

Specifications

Type:  4-track, 2 channel stereo and monauraal

Heads:  Super ferrite Core - Record/Play and Erase

Motor:  Double drive, Hysteresis Synchronous

Adaptable Tape:  regular, Low Noise, Chromium  Dioxide C-30; C-60; C-90; C-120

Tape Speed:  1-7/8 ips

Amplifier:  2 FETs, 14 Silicon Transistors

Wow and Flutter:  less than 0,13%

Frequency Response:

Chromium Dioxide tape :  25 - 15,000 Hz

Regular Tape :  25 - 13,000 Hz

Signal-to-Noise Ratio with Dolby

Chromium Dioxide tape :  58 dB

Regular Tap :  55 dB

Signal-to-Noise Ratio without Dolby

Chromium Dioxide tape :  48 dB

Regular Tap :  45 dB

Recording Bias:  85 kHz

Separation

Between Tracks :  better than40 dB

Between Channels :  better than 40 dB

FF/Rewind Time :  less than 75 sec. C-60 tape

Inputs Sensitivity/Impedance

2 Mix :  0,3 mV/600 Ω

2 Line 77,5 mV/680 k Ω

Output level/Impedance:

2 Line :  0,775 V /100 k Ω

Headphone :  8-16 Ω

DIN Connectors

Input :  9,8 mV (min. Input Level)

Output :  0,775 V (below 100 k ohms

Power Supply:  110 - 120 V AC, 50/60 Hz

Power Consumption:  20 W

Dimensions (W x H x D):  15-1/2" x 4-1/2" x 11-1/4"

Weight:  13 lbs

Kenwood KR-70 receiver

Stereo Receiver, the best in FM reception. The finest in stereo sound

New from Kenwood, stereo receiver designed for the FM buff who demands the finest in broadcast reception and who also enjoys the luxury of a complete stereo system. Two integrated circuits IF stage and 2 FETs in the FM front-end, coupled with a 4-gang tuning condenser, provide better than average sensitivity, superior alternate channel selectivity and freedom from noise and interference. Silent, automatic switching from mono to stereo activates a stereo indicator light. A power output of 75 watts (IHF) at 4 Ω  and 56 watts at 8 Ω , inputs to accommodate phonograph, tape deck, and auxiliary, 2 pairs of stereo speaker terminals, plus center channel output, with output switch to control speakers individually or together, and Kenwood's famous U.S. patented power transistor protection circuit are among the features that account for the high performance characteristics of the KR-70. the best in broadcast reception, the highest standards in stereo componentry - all at the delightfully low price, including cabinet.

 

Special features

2 Integrated Circuits FM IF Stages

2 Field Effect Transistors (FET)

4-gang Tuning Condenser Super-sensitive Front-end

New "Luminous Dial";

Tuning Meter and FM Stereo Indicator

Solid State Time Switching FM Multiplex Demodulator and Automatic Stereo Mode Silent Switching Circuit

Unique keyboard Controls Regulate Loudness Control

Noise Filter

Tape Monitor and Mode

Front Panel Dubbing/Tape Recording Jack and Stereo headphone Jack

Silicon Power Transistor Amplifier (U.S. Pat. 3277385)

Power Transistor Protection Circuit

2 pair of Stereo Speaker Output Terminals for 2 Sets of Stereo Speakers and Front Panel Speaker Selector Switch (A speakers, B speakers, A-B speakers, Headphones)

Center Channel Output

Handsome Simulated Walnut Finish Cabinet Included in the price of Unit

 

Specifications

FM Tuner Section

Sensitivity (IHF):  1,9 µV

Total Harmonic Distortion: less than 0,8% (400 Hz, 100% Mod.)

Signal-to-Noise Ratio: better than 60 dB

Capture Ratio:  2,5 dB

Image Rejection:  better than 70 dB

IF Rejection:  better than 80 dB

Selectivity:  45 dB (alt. Channel)

Stereo Separation:  better than 35 dB at 1,000 Hz

IF Stage:  2 ICs, 2 Transistors

Front-end:  2 FETs, 4-gang tunig condenser

Spurious Radiation:  less than 34 dB (50 µV)

Antenna Impedance:  300 Ω  balanced

Amplifier Section

Total Music Power (IHF):

75 watts at 4 Ω

56 watts at 8 Ω

Continuous Power Each Channel Driven:

33/33 watts at 4 Ω

24/24 watts at 8 Ω

Both Channel Driven:  18/18 watts at 8 Ω 

Total Harmonic Distortion :  less than 0,5% at rated output

Intermodulation Distortion :  less than 0,5% at rated output

Frequency Response

High Level Input:  20 Hz to 30,000 Hz ±1,5 dB

Power Bandwidth (IHF):  20 Hz to 30,000 Hz

Input Sensitivity (for rated output)

Mag :  2,0 mV

Aux :  200 mV

Tape Play (PIN) :  200 mV

Tape Play (DIN) :  200 mV

Recording Output:

PJN :  200 mV

DIN :  35 mV

Dubbing :  200 mV

Max. Input Signal:  180 mV (p-p 1,000 Hz) at mag Input

Hum and Noise (below rated output)

Phono 9Mag) :  60 dB

Aux :  70 dB

Tape Play :  70 dB

Noise at Minimum Volume Control:  less than 1,5 mV at 8 Ω  or 0,26 microwatt

Damping Factor:  23 at 8 Ω

Speaker Impedance:  4, 8, 16 Ω

Bass Control:  ±10 dB at 100 Hz

Treble Control :  ±10 at 10,000 Hz

Noise Filter:  3,000 Hz cut-off

Loudness Control (at -30 dB):  +8 dB at 100 Hz, +3 dB at 10,000 Hz

Power Requirements:  AC 110 - 120 V, 50/60 Hz

Power Consumption:  113 watts at full power (20 watts at no signal)

Dimensions (W x H x D):  16-1/2" x 5-1/2" x 12-1/2"

Weight:  21 lbs

 

Kenwood KR-6340 receiver

Kenwood Two-Four Receiver

This receiver in the new Kenwood "Two-Four" line gives you: firstly, it functions as a high-grade stereo receiver with 80 watts of RMS power (152 watts total IHF music power); secondly, it decodes regular matrix (RM sources with accurate four-channel separation); thirdly, its SQ decoder circuit permits 4-channel play of SQ Matrix records; and , last but not least, it accepts a little plug-in CD-4 demodulator - our model KCD-2 - for playing discrete 4-channel CD-4 records. So, whatever the situation in regard to record availability in your area may be, whatever personal listening preferences you may have, whether you want to go 4-channel right now or wait a little longer, the KR-6340 is tailor-made to your needs.

Coming from Kenwood, the KR-6340 boasts the kind of careful, guaranteed engineering that's exemplified by DSD FM stereo decoding, unconditionally guaranteed output power at any frequency, and fully electronic protection against short-circuits and overload. All told, a two-channel/four-channel receiver that continues a great tradition of Kenwood high fidelity.

 

Four-channel capabilities

Built-in Separate SQ and RM Matrix Decoders

Prepared for FM Discrete 4-channel Broadcasts

Accepts Plug-in CD-4 Demodulator

Recording and playback 4-channel Tape and Aux Connectors, and 4-channel headphone jakcs

Drivers a Total of Eight Speakers

 

Amplifier section capabilities

BTL Amplifier Layout Gives 250% Power in 2-channel mode

Power Guaranteed Unconditionally at Any Frequency

Fully Electronic Protection Circuit

AM/FM Stereo Tuner Capabilities

FET and Ceramic Filters in FM Tuner

Exclusive Kenwood DSD System

Other Features
Program Indicator Lamps

Convenient 4-channel Balance Controls

 

Specifications

FM Tuner Section

Usable Sensitivity (IHF):  2,0 µV

Frequency Response:  20 Hz - 15,000 ±1,2 dB

Total Harmonic Distortion

Mono :  0,5% (at 400 Hz 100% modulation)

Stereo :  0,8% *at 400 Hz 100% modulation)

Signal-to-Noise Ratio:  63 dB at 1 mV input

Image Rejection:  60 dB

Selectivity (IHF ALT channel):  50 dB

IF Rejection:  90 dB

Spurious Signal Rejection:  90 dB

AM Suppression:  60 dB

Capture Ratio:  3,0 dB

Stereo Separation:  40 dB (at 1,000 Hz); 20 dB (at 10,000 Hz)

Subcarrier Suppression:  45 dB

Antenna Impedance:  300 Ω  (balanced); 75 Ω  (unbalanced)

AM Tuner Section

Usable Sensitivity (IHF):  25 µV

Signal-to-Noise Ratio:  45 dB at 1 mV input

Image Rejection:  45 dB

Selectivity (IHF):  30 dB

IF Rejection:  35 dB

Antenna:  Built-in ferrite bar antenna

Main Amplifier Section

RMS Power Output Full Channel Driven into:

8 Ω  at 20-20,000 Hz  :  2 x 40 watts (2-ch); 4 x 15 watts (4-ch)

8 Ω  at 1,000 Hz  :  2 x 50 watts (2-ch); 4 x 20 watts (4-ch)

4 Ω  at 10,000 Hz  :  2 x 45 watts (2-ch); 4 x 23 watts (4-ch)

Dynamic Power Output

Into 8 Ω  :  170 watts (2-ch); 120 watts (4-ch)

Into 4 Ω  :  152 watta (4-ch)

Total Harmonic Distortion

At Rated Power into 8 Ω  :  0,8%

At -3 dB Rated Power into 8 Ω  at 1,000 Hz :  0,3%

Intermodulation Distortion (60 Hz : 7 kHz = 4 : 1)

At Rated Power into 8 Ω  :  0,8%

At -3 dB Rated Power into 8 Ω :  0,3%

Power Bandwidth:  20 Hz - 40,000 Hz

Damping Factor:  20 at 8 Ω  (4-ch)

Speaker Impedance:  4ohm - 16 Ω

Pre-Amplifier Section

Input Sensitivity/Impedance

Phono :  1,5 mV/100 k Ω

AUX :  150 mV/50 k Ω

Tape Play :  150 mV/50 k Ω

Maximum Input Voltage (RMS)

Phono 1 :  100 mV (T.H.D. 0,8% at 1,000 Hz)

Signal-to-Noise Ratio

Phono :  60 dB

AUX :  75 dB

Tape Play :  75 dB

Output Voltage/Impedance

Tape Rec (PIN) :  150 mV/100 Ω

Tape (DIN) :  40 mV/50 Ω

Frequency Response

Phono 1, 2 :  RIAA Standard curve ±1 dB

Tuner, AUX, Tape Play :  20 - 20,000 Hz ±1 dB

Tone Controls

Bass :  ±10 dB at 100 Hz

Treble ±10 dB at 10,000 Hz

Loudness Control (-30 dB) :  +10 dB at 100 Hz ; +5 dB at 10,000 Hz

General

Switches

Speaker Selector :  A, B Push Switch

Input Selector :  AM; FM; Phono; CD-4; AUX

Mode:  Mono; 2-CH; RM; SQ; Discrete

Tape Monitor:  Push Switch

Others:  Loudness, AMP Control, Muting

AC Outlet:  1 unswitched

Power Consumption:  320 watt at full power; 35 watt at no signal

Dimensions (W x H x D):  500 x 153 x 360 mm (19-11/16" x 6-⅓2" x 14-5/32")

Weight:  15 kg (33 lbs)

 

Kenwood KX-1060 tape deck

The Kenwood KX-1060: 3-head cassette deck capable of accommodating all the latest advanced tapes.

For the fast-growing group of audiophiles who demand a cassette deck that is capable of capturing on tape the best that modern audio equipment can reproduce, here is the KX-1060, incorporating some of the most advanced cassette technology available today. Its three-head design ensures that both recording and playback of tapes of extended frequency response, low distortion, low noise, wide dynamic range and high saturation levels. The provision of separate record and playback heads also means that the recorded program can be monitored instantly as it is being recorded. Moreover, with the double Dolby noise reduction system, the recording being monitored is precisely what will be heard in actual playback. But tape recording enthusiasts will undoubtedly appreciate the ability of the KX-1060 to accommodate every kind of tape available-including the most recent and significant development, metal tape. With the variable, oscillator-adjusted bias control and separate equalization switch, any tape you choose will perform to the limits of its capability. But while these exciting features point to electronic excellence in the KX-1060, they are fully matched by the highly accurate, rugged and stable tape transport that utilizes the proven Kenwood two-belt drive system to maintain low wow-and-flutter of 0,045% WRMS. In this brochure you will find full details of the many performance and design features that make the KX-1060 one of the finest decks to be found today. But there is only one sure way we can prove to you that the KX-1060 can record and playback tapes with an outstanding musical quality.

 

The Kenwood Two Belt Transport

Although two motors might seem superior, Kenwood engineers have designed a rugged two-belt tape transport that uses a single motor producing only 0,045% WRMS Wow and Flutter. The highly stable, accurate two-belt-drive system uses a flat, wide belt to drive the precisely machined capstan while another belt drives the take-up reel. Thus no irregularity created in the build-up of tape on the take-up reel can affect the accuracy of the capstan drive. The diagram shows how this is done. In addition, the larger 210-gram flywheel produces inertial energy as high as 1094 g.cm, which is sufficient to absorb the minutest irregularities created in the rest of the transport.

 

VU meters with peak-level LED

Average recording levels are provided by large VU meters. Transient signal peaks are indicated by fast-reacting LED that operate above +6 VU. VU meters, peak LED and tape monitor provide optimum results.

Memory Index

Returns the tape to "000" after recording or playback. Shuts off automatically ready for further playback or re-recording, or repeats playback automatically.

Timer Stand-by

Set pause control in either record or playback mode. When the power is turned on by the timer, the deck will start operations. Record FM broadcasts on time, or when away. A timer such as the Kenwood AT-70 can also be put to use to play favorite waking-up music.

Input selector with ATT MIC position

Avoid excessive input levels when live recording with a high-sensitivity microphone. The ATT MIC position attenuates level by 12 dB. The mic amplifier is bypassed when not in use to gain higher Signal-to-Noise Ratio ratio/

 

More useful features of the KX-1060:

Soft-touch lever operated controls

Cassette door/tape loader

Remaining tape illumination

Full automatic shut-off in all modes

 

Specifications

Type:  Front loading stereo cassette deck with Dolby system

Track System:  4-track 2-channel Stereo/Mono Record/Playback

Recording System:  AC Bias (Bias Frequency; 85 kHz)

Erasing System:  AC

Tape Speed:  4,76 cm/sec (1-7/8 ips)

Heads:  Three Ferrite Heads - Record/Playback Combination Head Erasing Head

Motor:  Electronically Controlled DC Motor

Fast Winding Time: Approx 85 seconds with C-60 tape

Frequency Response

Normal Tape :  20 Hz to 18,000 Hz (30 Hz - 17,000 Hz ±3 dB)

Cr02 Tape :  20 Hz to 19,000 Hz (3o Hz - 18,000 Hz ± 3 dB)

Metal Tape :  20 Hz to 19,000 Hz (30 Hz - 18,000 Hz ±3 dB)

Signal-to-Noise Ratio

Dolby ON (Over 5 kHz)

Normal Tape :  63 dB

CrO₂ Tape :  65 dB

Metal Tape :  65 dB

Dolby OFF

Normal Tape :  53 dB

CrO₂ Tape :  55 dB

Metal Tape :  55 dB

Total Harmonic Distortion :  less than 1,0% (at 1 kHz, 0 VU with Metal Tape)

Wow and Flutter:  0,045% WRMS

Input Sensitivity/Impedance:

Line x 2 :  77,5 mV/50 k Ω

DIN x 1 :  0,75 mV/4 k Ω

Microphones x 2 :  0,18 mV/18 k Ω

Output Level/Load Impedance

Line x 2 :  775 mV (0VU)/100 k Ω

DIN x 1 :  775 mV (0 VU)/100 k Ω

Headphones x 1 :  48,9 mV/8 Ω  to 16 Ω

Power Requirements:  AC 120 V, 60 Hz; AC 120/240 V, 50/60 Hz

Power Consumption:  14 watts

Dimensions (W x H x D):  440 x 153 x 378 mm (17-5/16" x 6" x 14-7/8")

Weight:  8,4 kg (18,5 lbs)

 

Kenwood TK-140X receiver

IC-FET-Solid State AM/FM Stereo Receiver

A delectable treat for the sagacious sound connoisseur; the ineffable TK-140X

Kenwood's superior sensitivity and astonishing selectivity starts with 3 FET's 4-gang tuning condenser, 4 ICs IF circuit super sensitive front-end. Sensitivity of the TK-140X is a remarkable 1,7 microvolt - but even more important is Kenwood's selectivity, especially in major metropolitan areas. Where there are two FM stations on the same frequency, a mere 1 dB difference is all that is necessary for the TK-140X to capture one station and utterly reject the other.

The abundant power  - 200 watts - of the TK-140X permits you to drive the least efficient speaker systems with ample power to spare, (in fact, the Kenwood TK-140X gives you two sets of stereo speaker outputs, plus stereo headphone jack.)

But most important is the way the TK-140X reproduces music. Every delicate little tone, every subtle note, every nuance of the original sound is clean, pure, crisp and transparent.

 

New Luminous-Dial

The dial of the Kenwood TK-140X is new. Even the large tuning meter with stereo indicator is new. When the set is on, the dial illuminates in a beautiful blue hue, with every FM and AM frequency clearly visible. Turn the set off, and all the numbers disappear leaving an elegant opaque decorator panel.

200 Watts Undistorted Music Power

Kenwood invites comparison of the TK-140X's power amplifier output characteristics against those of any other stereo tuner-amplifier. The figures should speak for themselves in the TK-140X's favor. It delivers 200 watts in music power at 4 Ω ; 170 watts at 8 Ω , IHF standard. Also in terms of continuous power: 80watts/80 watts at 4 ohms; 60 watts/60 watts at 8 ohms. Distortion factor at rated output; less than 0,5%. Power bandwidth: 15 Hz to 30,000 Hz. These superior specifications are the result of special complementary Darlington circuits and heavy duty silicon transistors, both in its driver and power amplifiers. These silicon transistors also assure long lasting, excellent performance.

FET, Supersensitive Front End

The TK-140X boasts an FM Front End that also vies comparison with the most expensive FM Tuners. Take the 3 FET used in two stages of RF amplification, and the Mixer. Also the 4-gang variable capacitor, and stable oscilator, (Frequency drift within 0,015% over temperature variations between -10 to 50 Centigrade). They all add up to a super-sensitive, distortion-free FM front end with selectivity characteristics that are hard to beat. Sensitivity (IHF): 1,7 µV. Image Rejection, Cross Modulation, IF Rejection; all better than 100 dB. Alternate Channel Selectivity: 45 dB. T.H.D. less than 0,5% at 400 Hz, 100% modulated signal.

The TK-140X has an FM antenna coupling transformer which provides perfect matching at its 75 Ω. Input for single wire or coaxial cable antenna leading, or at its 300 Ω . Input for parallel feeder lines. This eliminates any possibility of line-to-tuner coupling losses due to impedance mismatch.

New Integrated Circuits

Use of new , high-gain Integrated Circuits (IC) in all 4 IF Amplifiers has permitted the TK-140X's Limiter Circuit to react to extremely minute input voltages. This has LED to the exceptional Signal-to-Noise Ratio of better than 65 dB and an FM Capture Ratio of 1,0 dB. This means that where there are two FM stations on the same frequency, a mere 1 dB difference is all that's necessary to capture one station and utterly reject the other.

 

Specifications

Amplifier Section

Total Music Power (IHF):  200 watts at 4 Ω ; 170 watts at 8 Ω

Continuous Power (IHF)

Each Channel Driven :  80/80 watts at 4 Ω ; 60/60 watts at 8 Ω

Both Channel Driven :  53/53 watts at 8 Ω

Total Harmonic Distortion :  less than 0,5% at rated output

Intermodulation Distortion : less than 0,5% at rated output (less than 0,2% at -3 dB rated output)

Frequency Response:

Main Input :  8 Hz to 120,000 Hz ±1,5 dB

Aux Input :  20 Hz to 30,000 Hz ±1,5 dB

Power bandwidth (IHF):  15 Hz to 30,000 Hz

Channel Separation:  better than 50 dB

Input Sensitivity (for rated output)

MAG :  2,0 mV

Tape HD :  2,2 mV

Aux :  160 mV

Tape Play (Pin) :  160 mV

Tape Play (DIN) :  160 mV

Main :  100 mV

Recording Output:  160 mV (Pin); 32 mV (DIN)

Maximum Input Signal (at mag Input):  180 mV (p-p 1,000 Hz)

Hum and Noise (below rated output):

Phono Mag :  65 dB

Tape HD :  63 dB

Aux :  75 dB

Tape Play :  75 dB

Noise at minimum volume control :  less than 1,5 mV at 8 Ω  or 0,28 micro watts (83 dB)

Damping Factor:  28 at 8 Ω  (Output impedance of speaker terminal is 0,286 Ω )

Speaker Impedance: 4, 8 and 16 ohms

Controls

Bass :  ±10 dB at 100 Hz

Treble ;  ±10 at 10,000 Hz

High Filter ;  3,000 Hz cut-off

Low Filter ;  200 Hz cut-off

Loudness Control:  +6 dB at 100 Hz, +2 dB at 10 kHz ( at -30 dB)

Output Switch:  Power off, A speaker, B speaker, A+B speakers and Phones

Mode Switch:  left, Right, Stereo, Rev., Mono

Selector Switch:  AM, FM Auto, Phono, Tape HD & Aux

Keyboard Type Switch:  Loudness, tape Monitor, Muting, Low Filter and High Filter

Outputs:  2 pairs of stereo speaker terminals, Center channel output (low level), Pre-amp, output, Tape recording output, headphone jack , AC outlet

FM Tuner Section

Antenna Impedance:  300 Ω  balanced, 75 Ω  unbalanced

Sensitivity (IHF): 1,7 µV

Total Harmonic Distortion:  less than 0,5% 400 Hz 100% mod.

Signal-to-Noise Ratio:  better than 65 dB

Capture Ratio:  1,0 dB

Image Rejection:  better than 100 dB

Cross Modulation Ratio:  better than 100 dB

IF Rejection:  better than 100 dB

Selectivity (Alt. Channel):  45 dB

Stereo Separation:  better than 35 dB at 1,000 Hz

FM IF Stage:  4 ICs

FM Front End:  3 FETs 4-gang tuning condenser

Inter-Station Muting:  keyboard switch

FM Spurious Radiation:  less than  34 dB (50 µV)

AM Tuner Section

Sensitivity (IHF):  15 µV at 1,000 kHz

Image Rejection:  90 dB at 1,000 Hz

Selectivity:  better than 25 dB

Semiconductors:  4 ICs; 3 FETs; 52 Transistors; 35 Diodes; 5 Thermister

Power Requirements:  100 - 120 V, 220 - 240 V 50/60 Hz

Power Consumption:  250 watts at full power 34 watts at no signal

Dimensions (W x H x D):  16-1/2" x 5-1/2" x 12-1/4"

Weight:  28,5 lbs (net)

 

Kenwood KR-6170 receiver

Jumbo Stereo Receiver KR-6170

High fidelity, to most people, still means authentic reproduction of broadcast or pre-recorded sound. A sophisticated electronic device for increasing one's listening pleasure. Advent of Kenwood's epoch-making KR-6170 Jumbo Stereo Receiver, however, has completely changed this concept. Stereo today is for playing as well as for listening. A completely new field of stereo enjoyment. Play or practice your favourite musical instrument to the accompaniment of Electronic Rhythm Composer which produces 12 different rhythms. Five electronic percussions are also at your beck and call. It can make your party. But that's not why it's a Jumbo

KR-6170 is also equipped with Reverberation Unit; Echo-Sound Output terminals for 4-channel reproduction; 4-sets of speaker terminals (A, B, C, D and any combination0; 2-Hour Timer for automatic shut-off; 2 jacks for both Guitar and Microphone (with Mike-Mixing Volume Control); 2 pairs of tape Monitor circuits; Foot-Start Switch for Rhythm Composer and Dynamic Mike; etc.

All this housed in a single Jumbo unit with a power output of 180 watts. This is the New Stereo, geared to listening and playing pleasure.

 

Reverberation Unit

The KR-6170 features exclusive Reverberation Unit offering echo effect. Thanks to the strictly selected materials for spring and damper. It has no unnaturalness. The reverberating time can be controlled up to maximum 2 seconds by the Level Adjustor.

The another extraordinary feature is Reverberation Mode Switch which enables selecting input sources to be reverberated. At "source" position the reverberation is added to all the sources. Guitar, Microphone and Rhythm can be independently reverberated. The listening and playing pleasure is greatly enhanced.

 

Electronic Rhythm Composer

12 different rhythm varieties can be produced by 5 electronically composed percussions. KR-6170 has clearly changed the concept of a receiver with adding the enjoyment of "play along" besides that of listening. The built-in features are:

Tempo Control - offering tempo variety slow to quick

Rhythm Mode Switch - reproducing mode of a rhythm is selectable according to the situation

Rhythm Tone Control - booth of high and low tone volume can be independently increased or decreased in order to obtain the most suitable rhythm balance

Rhythm Selector - by the pushbuttons 12 rhythms are selectable

Foot Switch - as an accessorised part the foot remote pedal is attached for easy use while the hands are occupied.

 

Specifications

Continuous Power Output:

50/50 watts each channels at 4 Ω 

40/40 watts each channels at 8 Ω

Total Harmonic Distortion :  0,5% (at rated); 0,1% (at -3 dB rated)

Intermodulation Distortion:   0,5% (at rated); 0,2% (at -3 dB rated) 

Frequency Response:

High Level (Aux) Input :  20 - 40,000 Hz ±1,5 dB

Power bandwidth (IHF):  17 - 30,000 Hz

Input Sensitivity/Impedance (for Rated Output)

Phono 1, 2 :  2,5 mV/50 k Ω

Mic :  2,0 mV/10 kohm

Guitar :  15 mV/30 k Ω

Aux 1, 2 :  150 mV/100 k Ω

Tape Play A, B :  150 mV/100 k Ω

Main Input :  100 mV

Hum and Noise

Phono 1, 2 :  65 dB

Mic :  58 dB

Aux, Tape Play :  75 dB

Damping Factor ( at 8 Ω ):  50

Speaker Impedance: 4 - 16 Ω

Multi Presence Control:  Selector-Defeat/Loudness (at 100 Hz ; +10 dB, at 10,000 Hz ; +5 dB)/Tone/Jazz/Vocal/Mood

Bass Control:  ±10 dB at 100 Hz

Treble Control:  ±10 dB at 10,000 Hz

Electronic Rhythm Composer Section

Rhythm Selector: 1 - March; 2 - Fox Trot; 3 - Rock; 4 - R & B; 5 - Ballad; 6 - Shuffle; 7 - Boss nova 1; 8 - Boss nova 2; 9 - Latin Beat; 10 - Mambo; 11 - Waltz; 12 - jazz Waltz

Electronic Percussions:  5 different Sounds

Rhythm Mode Switch:  Left, Right; stereo, Reverse, Mono

Start Switch:  Off, Start

Tempo Control:  Slow to Quick

Rhythm Tone:  Low-bass Drum Level; high High Hat, Claves Level

Reveberation Section

Level Control:  0 to 2 seconds

Mode:  Off-source-Guitar-Mic-Rhythm

Timer Section:  2 hours

General

AC Outlets:  Switched x 1 ; Unswitched x 2

Power Requirements:  110 -120 V, 220 - 240 V, 50/60 Hz

Power Consumption:  at full power 240 watts, at no signal 45 watts

Dimensions (W x H x D):  552 x 171 x 425 mm (21-3/4" x 6-3/4" x 16-1/4")

Weight:  16 kg (35,2 lbs)

 

Kenwood KX-1030 cassette deck

Most advanced technology of cassette deck design

The KX-1030 achieves electrical and performance characteristics equal to , or better than those of any cassette deck available today at any price. The extraordinary performance of this cassette deck is a direct result of the many years of research and development of dedicated Kenwood engineers, and their desire to achieve a level of performance that goes far beyond the state-of-the-art..

Consider just one performance feature of the KX-1030. there exist a number of cassette decks which incorporate "three-head" design for the purpose of monitoring recordings directly from the tape as they are being made. The KX-1030 provides for such instant playback of recordings, but Kenwood engineers have incorporated independent record and playback heads for this purpose, thereby achieving a performance level not possible with dual-purpose combination record/playback heads. As a result, the KX-1030 provides extended frequency response, wider dynamic range and higher saturation levels - performance qualities that are indispensable for high quality tape reproduction.

 

Flat Drive Belt - the key to further improvement in woa and flutter

The drive system used to transfer rotational energy from the motor to the flywheel can be used to further reduce undesirable wow-and-flutter. A round cross-sectional type of belt, such as that used in most cassette decks, does not provide sufficient contact surface to be used in a precision cassette deck such as the KX-1030. in order to reduce slippage and vibration caused by the subtle, irregular motion that takes place between the flywheel and the drive belt, Kenwood engineers elected to use a flat belt having a width of 5 millimeters. This belt not only reduces slippage because of its large contact surface, but also absorbs vibration caused by the irregular motion inherent in the remainder of the drive system.

Unlike flywheels with V-grooves gouged into their surfaces, the flat, polished surface of the flywheel used in the KX-1030 provides exact concentricity required for precise rotation. Such accurate roundness is difficult if not impossible to achieve with conventional V-grooved flywheels.

 

Vertical Tape Trasport using Independent Belt Drive System

In most cassette decks employing a single-motor drive, one belt is used to drive the tape as well as the take-up reel. In such systems, so long as there is no tape on the take-up reel side, the capstan drive system operates without interruption. However, as tape accumulates on the take-up side, irregularities or "bumps" in the action of the take-up reel may affect the operation of the capstan drive.

In order to reduce wow created by such vibration, Kenwood engineers decided to incorporate two separate belts; one solely for driving the capstan; the other for driving the take-up reel. As a result of this two-belt system, the KX-1030 provides low wow-and-flutter as well as accurate and stable rotation of the capstan, regardless of tape accumulation on the take-up reel of the cassette.

 

Capstan Roundness Accuracy

The capstan used in Kenwood's KX-1030 is machined to the critical roudness tolerance of 0,1 microns, thus reducing another important cause of wow-and-flutter. The capstan roundness chart , indicates clearly the degree of roundness achieved in Kenwood capstans.

Capstan accuracy must be maintained indefinitely, and not only when the cassette deck leaves the factory. In order to maintain this built-in accuracy, Kenwood engineers have incorporated a triangular capstan support system. This three-point support (as opposed to single or dual-support systems used by other manufacturers) can withstand shock from any direction without affecting the mechanical stability of the capstan system. Thus, long term reliability and low wow-and-flutter performance are assured through many years of continued use.

 

High Power, High Torque DC Servo Motor

While the use of a large flywheel in a cassette deck's transport system contributes significantly to stable and accurate rotation of that drive system, driving such a heavy flywheel requires a motor with high rotational torque. Kenwood engineers have incorporated a motor with a rotational torque of 50 gram centimeters in the KX-1030 - compared with approximately 20 gram centimeters of torque provided by the motors used in many other cassette decks. Another important feature of this well designed DC servo motor is that a sudden increase in load (often encountered in cassette drive systems when less-than-perfect cassette tape housing are used) has a negligible effect upon the stability of the tape drive system.

 

Specifications

Type:  Front Loading Stereo Cassette Deck with Dolny System

Track:  4-track 2-channel Stereo/Mono Recording/Playback

Recording System:  AC Bias System (Bias Frequency: 85 kHz)

Erasing System:  Ac System

Tape Speeds:  4,76 cm/sec (1-7/8 ips)

Heads:  Three Ferrite Heads

Recording and Playback Dual Combination Head x 1

Erasing Head x 1

Motor:  Electronically Controlled DC Motor

Fast Winding Time:  Approx. 80 sec. C-60 tape

Frequency Response

Normal Tape :  25 Hz to 17,000 Hz (35 Hz - 15,000 Hz ±3 dB)

CrO₂ Tape :  25 Hz to 20,000 Hz (35 Hz - 18,000 Hz ±3 dB)

Ferri-CrO₂ Tape :  25 Hz to 19,000 Hz (35 Hz - 17,000 Hz ±3 dB)

Signal-to-Noise Ratio

Dolby On (over 5 kHz):  65 dB (Normal Tape ):  67 dB (CrO₂ tape)

Dolby Off :  55 dB (Normal tape); 57 dB (CrO₂ tape)

Total Harmonic Distortion:  less than 1,3% (at 1 kHz, 0VU with Normal tape)

Wow and Flutter:  0,06% (WRMS)

Input Sensitivity/Impedance

Line x 2 :  77,5 mV/56 k Ω  ( or 0,1 mV/1,0 k Ω  )

DIN x 1 :  10,9 mV/1,5 k Ω

Microphones x 2 :  0,19 mV/10 k Ω

Output Level/Load Impedance

Line x 2 :  775 mV (0VU) / 2,0 k Ω

DIN x 1 :  775 mV (0VU) / 2,0 k Ω

Headphones x 1 :  48,9 mV / 8 Ω  - 16 Ω

Power Requirements:  AC 120 V 60 Hz (USA, Canada); AC 220 V , 50 Hz (Australia); AC 240 V, 50 Hz (UK )

Power Consumption:  13,0 watts

Dimensions (W x H x D):  430 x 167 x 332 mm (16-15/16"x 6-9/16"x13-1/16")

Weight:  7,5 kg (16,5 lbs)