Fisher 500-TX receiver

AM/FM Stereo Receiver, with Four methods of Tuning

Engineering leadership of thirty two years in creating the finest receiving equipment has reached its culmination in the Fisher 500-TX. This powerful AM-FM Stereo Receiver is truly the connoisseur's dream, incorporating every state-of-the-art. Feature,

 

Four method of Tuning

Manual - Fisher's ultra-smooth flywheel mechanism assures effortless AM and FM tuning across the large, illuminated, easy-to-read dial scale

Pushbutton - Fisher's Tune-O-Matic Memory Tuning provides instant selection of any one of your four favourite FM stations, simply by pushing a button. This is accomplished by four separate tuning mechanisms and four individual dials with separate control knobs on the front panel. Perfectly matched varactor diodes (variable capacitance or "tuning" diodes) select the exact frequency to which each memory is pre-set, assuring precise tuning each time the station is selected. Drift or deviation from the pre-set position is avoided, since the signal frequency is "locked-in" by AFC.

AUTOSCAN Touch Tuning - is the remarkable FM tuning mode which affords effortless scanning of the FM band in both directions, at the touch of a button. Completely electronic with no motors or moving parts, this unique circuit uses the same varactors previously described to tune either one station at a time, or station after station in continuous sequence. Autoscan tunes in complete silence and will lock onto each station with unerring accuracy, to  degree unmatched by any conventional tuning method.

Remote Control - Station selection using the Autoscan circuit may also be accomplished by means of an accessory unit (Fisher RK-30) which provides convenient tuning from a remote position in the listening area. The RK-30 is a hand-held remote control with 20 feet of flexible cable which permits the user to select stations without leaving his seat.

 

Highest Sensitivity

The sensitivity of the 500-TX, is rated at 1,7 µV, representing the all-important factor in the outstanding ability of the tuner to provide strong and clear reception of even the weakest signals. The FM front end consists of a 4-gang circuit incorporating four newly developed varactor diodes plus dual-gate MOSFETs in the RF and mixer stages. A highly efficient AGC circuit effectively prevents overload and distortion in very strong signal areas, such as cities, even though signals as high as one volt are received.

 

Highest Selectivity

Clean reception of weak, distant stations located adjacent in frequency to very strong local stations is provided by a crystal filter in the FM-IF stage of the tuner. Previously available only in the most expensive communications and military receivers, this filter is utilized to its fullest advantage in the 500-TH to pull in distant stations with "crystal" clearness. A distinct advantage of crystal filters, as compared with conventional filter coils, is that they never need alignment.

The AM-IF section is equipped with a 4-resonator ladder-type ceramic filter of exceptionally high selectivity. This filter assures vastly improved reception of distant AM stations and, in addition, eliminates annoying whistles. It provides optimum bandwidth for vastly superior AM reception

The AM section also features a 3-gang variable capacitor, a tuned RF and a mixer section using a newly developed dual-transistor circuit to minimize noise and prevent overloading.

 

Specifications

FM Tuner Section

Usable Sensitivity (IHF Standard):  1,7 µV

Harmonic Distortion (at 400 Hz, 100% Mod.):  less than 0,4%

Signal-to-Noise Ratio (at 100% Mod. 1 mV input):  65 dB

Selectivity Alternate Channel:  70 dB

Spurious Response rejection (at 100 MHz):  100 dB

Image Frequency Rejection (at 100 MHz):  65 dB

IF Frequency Rejection (at 100 MHz):  80 dB

FM Stereo Separation (at 400 Hz):  38 dB

Capture ratio (IHF at 1 mV):  1,5 dB

AM Tuner Section

Sensitivity:  10 µV

Selectivity (at 1 MHz and ±10 kHz):  80 dB

Image Frequency Rejection (at 1 MHz):  70 dB

IF Frequency Rejection (at 1 MHz):  65 dB

Amplifier Section

Music Power (at 1 kHz, 8 Ω ):  200 watts ±1 dB

IHF Dynamic Power (8 Ω ):  75/75 watts

RMS Power (at 1 kHz, 8 Ω ):  65 /65 watts

Total Harmonic Distortion (at 1 kHz):  0,5%

Intermodulation DIstortion (60/7000 Hz, 4;1, smpte):  0,8%

Power bandwidth (IHF, 8 Ω ):  8 to 35,000 Hz

Sensitivity (rated output at 8 Ω )

Phono Low :  2,5 mV

Phono High :  10,0 mV

Auxiliary :  250 mV

Monitor :  300 mV

Recorder Output (30% FM Mod.):  400 mV

Hum and Noise (below rated output)

Volume at Minimum :  -90 dB

Phono Low (6-mV ref.):  -60 dB

Auxiliary (400-mV ref.):  -65 dB

Frequency Response

Phono Low :  30 to 15,000 Hz ±2 dB

Auxiliary :  20 to 25,000 Hz ±1,5 dB

Power Amplifier Section :  15 to 40,000 Hz ±1,5 dB

Maximum Input Signal (at 1% T.H.D.)

Phono Low :  50 mV

Auxiliary :  4,5 volts

Input Impedance

Phono Low :  50 k Ω

Auxiliary :  175 k Ω

Damping Factor (1 kHz, 8 Ω ):  better than 30

Control Tracking Error (0 to -50 dB):  less than 2 dB

Separation (at 1 kHz)

Phono :  better than 45 dB

Auxiliary :  better than 50 dB

Controls

Bass :  24 dB at 50 Hz

Treble :  24 dB at 10 kHz

Subsonic Filter:  12 dB /pcatve below 10 Hz

Low-Frequency Filter (12 dB/octave):  -3 dB at 50 Hz

High-Frequency Filter (12 dB/octave):  -3 dB at 5,000 Hz

General

Power Supply:  100-120 AC, 50/60 Hz

Power Consumption:  Max. 240 watts / 320 VA

Dimensions (W x H x D):  16-7/8" x 4-13/16" x 14-1/2"

Weight:  30 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

 

Toshiba SA-504 4-ch receiver

4-channel FM/AM/FM Stereo receiver, features:

BTL circuit (53 W x 2,8 rms, 8 Ω , 0,8%)

ITL-OTL-OCL pure complementary symmetry circuit

MOS FETs FM front end

4-gang linear frequency FM tuning condenser and tuned RF AM section

Built-in condenser cartridge equalizing circuit

Built-in QM and SQ 4-channel matrix decoder

CD-4 4-channel adaptor terminals

Black dial

Natural Walnut cabinet

 

Specifications

FM Tuner Section

Tuning Range :  88 - 108 MHz

Sensitivity: 1,8 µV (IHF)[1,8 µV, S/N=30 dB]

Signal-to-Noise Ratio:  66 dB

Capture Ratio:  1,5 dB

Image Rejection:  60 dB

IF Rejection:  80 dB

Spurious Rejection:  100 dB

AM Suppression:  50 dB (IHF)

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

Harmonic Distortion:

Mono :  0,2% at 400 Hz (100% modulation)

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

FM Stereo Separation:  35 dB at 1,000 Hz

19 kHz, 38 kHz Suppression:  50 db

AM Tuner Section

Tuning Range:  530 - 1605 kHz

Sensitivity :  15 µV (IHF)

Signal-to-Noise Ratio:  45 dB

Selectivity :  30 dB (±10 kHz)

Overload :  2 V/m at 1,000 Hz

IF Rejection:  70 dB

Harmonic Distortion :  1 %

Audio Section

Power Output:  30 W x 4 (rms 0,4%, 8 Ω , each channel driven) or 53 W x 2 (at BTL connection, rms 0,4%, 8 Ω , each channel driven)

Frequency Response:  20 - 40,000 Hz 12 dB

Power bandwidth:  10 - 80,000 Hz (IHF, 0,4%)

Signal-to-Noise Ratio

Phono :  65 dB

Aux :  80 dB

Input Sensitivity/Impedance (for rated output):

Phono :  2,5 mV/47 K Ω

CC :  30 mV/70 k Ω

Aux :  160 mV/47 K Ω

Tape :  160 mV/47 K Ω 

Damping Factor:  20 at 8 Ω

Tone Control:  ±10 dB at 100 Hz and/or 10 kHz

High Cut Filter:  6 dB /oct, fc = 9000 Hz

Low Cut Filter:  6 dB/oct, fc = 30 hz

Residual Noise:  1,5 mV or less

Loudness Control:  +10 dB (ay 100 Hz); +4 dB (at 10 kHz)

Total Control

Volume :  4-gang, co-axial

Tone Control : Bass and treble for each Front and Rear channel :  4-gang, co-axial

Balance :  4 (discrete)

Selector :  AM/FM auto/Phono/Aux 1 (4-ch)/ Aux 2 (4-ch)

Mode :  Mono/Stereo/4-ch 1 (QM)/4-ch 2 (SQ)/4-ch 3 (discrete)

Power/ Speaker Switch :  PWR Off/A (4-ch)/SP Off ]/B (2-ch)/A+B

Accessory Switch :  CC/Mag; Tape monitor, FM muting, Loudness, AFC, audio mute; Hi/Lo cut

Antenna

FM :  300/75 Ω  terminals

AM :  Ferrite core antenna, external antenna terminals

Connector :  Aux (4-ch), Phono (Mag/CC), Rec /P.B. (4-ch), 2-AC outlet, Headphone (frontand rear) pre-out/main-in

Accessory Circuit:  Circuit breaker for final stage FM muting, audio muting, signal strength meter, center-zero meter

Semiconductors:  5 ICs; 3 FET, 38 Transistors; 24 Diodes

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

Cabinet:  Natural walnut

Dimensions (W x H x D):  508 x 125 x 356 mm (20" x 4-7/8" x 14")

Weight:  15 kg (33 lbs)

 

Toshiba SA-304 4-ch receiver

4-channel FM/AM/FM Stereo receiver, features:

BTL circuit (20 W x 2 rms, 8 Ω , 0,8%)

IC power output section

MOS FETs FM front end

Built-in QM 4-channel matrix decoder

CD-4 4-channel adaptor terminals

Black dial

 

Specifications

Tuner Section

Tuning Range

FM :  88 - 108 MHz

AM :  530 - 1605 kHz

Sensitivity:

FM :  2,5 µV (IHF)

AM :  20 µV (IHF)

Signal-to-Noise Ratio

FM :  62 dB

AM :  45 dB

Capture Ratio:  2,5 dB

Image Rejection:

FM :  55 dB

AM :  35 dB

IF Rejection:

FM :  60 dB

AM :  30 dB

AM Suppression (FM):  35 dB

FM-ST Separation:  30 dB at 1000 Hz

Audio Section

Power Output:  10 W x 4 (4-ch), 20 W x 2 (BTL) rms each channel driven , 8 Ω , 0,8%

Frequency Response:  20 - 40,000 Hz ±2 dB

Power bandwidth:  20 - 30,000 Hz (IHF, 0,8%)

Signal-to-Noise Ratio

Phono :  60 dB

Aux :  70 dB

Input Sensitivity/Impedance (for rated output):

Phono :  3,0 mV/200 K Ω

CC :  30 mV/70 k Ω

Aux :  200 mV/100 K Ω

Damping Factor:  26 at 8 Ω

Tone Control:  ±10 dB at 100 Hz and/or 10 kHz

Residual Noise:  0,8 mV

Loudness Control:  +10 dB (ay 100 Hz); +4 dB (at 10 kHz)

Total Control

Volume :  4-gang, co-axial

Bass :  4-gang, co-axial

Treble :  4-gang, co-axial

Balance :  4 (discrete)

Selector :  AM/FM auto/Phono/Aux (4-ch)

Mode :  Mono/Stereo/4-ch 1 (QM)/4-ch 2 (SQ)/4-ch 3 (discrete)

Power/ Speaker Switch :  PWR Off/A (4-ch)/SP Off ]/B (2-ch)

Accessory Switch :  Tape monitor, 4-speaker/BTL, FM mute

Antenna

FM :  300/75 Ω  terminals

AM :  Ferrite core antenna, external antenna terminals

Indicator:  FM-ST indicator; F/AM tuning meter

Semiconductors:  5 ICs; 3 FET, 38 Transistors; 24 Diodes

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

Cabinet:  metal cabinet

Dimensions (W x H x D):  400 x 125 x 290 mm (15-3/4" x 4-7/8" x 11-3/8")

Weight:  8,2 kg (18 lbs)

 

Denon DRA-400 receiver

Quartz Synthesizer FM/AM Stereo Class-A Receiver

Non-Switching A circuitry can also be heard in the DRA-400. in addition to its built-in Moving Coil Head Amp and Digitally Synthesized FM tuning. With the DRA-400 Denon has made a new standard of listening quality available to those demanding economy and operating convenience in a compact package.

 

Features:

Class-A circuitry for clean, powerful sound

10 station preset memory

Quartz synthesizer tuning for crystal-accurate reception

 

Specifications

Continuous Power Output:

40 watts per channel min. RMS, both channel driven at 8 Ω  from 20 Hz -20 kHz no more than 0,02% T.H.D. (45 W per channel , 0,06% T.H.D.)

50 watts per channel min. RMS , both channel driven at 4 Ω  1 kHz, T.H.D. 0,009%

Power Bandwidth (IHF):  5 Hz - 40 kHz (T.H.D. 0,02% both channel driven at 8 Ω )

Total Harmonic Distortion:  0,02% (rated power into 8 Ω , 20 Hz = 20 kHz)

Damping Factor:  more than 80 (at 1 kHz, 8 Ω )

Preamplifier Section

Frequency Response

Phono RIAA Standard Curve (rec. Output) :  ±0,5 dB

Tape, AUX :  20 Hz - 20 kHz ±0,5 dB

Input Sensitivity/Impedance:

Phono MM :  2,5 mV/47 k Ω

Phono MC :  0,25 mV/100 Ω

Tape, Aux :  150 mV/ more than 33 k Ω

Max. Input Level (at 1 kHz)

Phono MM :  200 mV

Phono MC :  20 mV

Signal-to-Noise Ratio (IHF-A)

Phono MM :  80 dB

Phono MC :  62 dB

Tape, Aux :  96 dB

Tone Control Range

Bass :  ±10 dB at 50 Hz

Treble ±10 dB at 20 kHz

Loudness Control:  +10 dB at 100 Hz; +5 dB at 10 kHz (at -3 dB attenuation)

Subsonic Filter :  18 Hz, 6 dB/octave

FM Tuner Section

Receiving Range:  87,9 - 107,9 MHz (for E3, ECI); 87,5 0 108 MHz (For E2)

Mono IHF Sensitivity:  10,3 dBf

Signal-to-Noise Ratio (for E3, EC)

Mono :  75 dB

Stereo :  71 dB

Signal-to-Noise Ratio (46 dB Sensitivity) For E2

Mono :  2,2 mV

Stereo :  25 µV

Total Harmonic Distortion (1 kHz, 100% mod. For E3, EC)

Mono :  0,07%

Stereo :  0,15%

Total Harmonic Distortion 1 kHz, 40 kHz deviation For E2)

Mono :  0,1%

Stereo :  0,2%

Capture Ratio:  1,2 dB

Image Rejection:  45 dB

AM Suppression:  60 dB

Frequency Response:  10 Hz -15 kHz +0,5 dB -1,0 dB

Stereo Separation:  50 dB

AM Tuner Section

Receiving Range:  530 - 1620 kHz (for E3, EC); 522 - 1811 kHz (for E2)

Usable Sensitivity:  15 dBf (for E3, EC); 5,6 µV (for E2)

Signal-to-Noise Ratio:  55 dB

General

Power Supply:  AC 120 V, 60 Hz (AC  200 V, 220 V, 240 V 50/60 Hz)

Power Consumption:  130 W

Power Outlets:  100 W Switched; 1250 W Unswitched

Dimensions (W x H x D): 434 x 112 x 408 mm

Weight:  9 kg

 

Denon DRA-600 receiver

Class-A Amplification and Synthesized Tuning AM/FM Stereo Receiver

The first receiver from a true Audiophile Company, Denon DRA-600

The Denon DRA-600, a synthesis of Denon's greatest technological strengths. From our many years of experience with moving-coil cartridges we gave it a moving-coil preamplifier stage sonically as transparent as our renowned separate head-amps.

From our fifty-plus years (1981) of electronics design experience, we powered the DRA-600 with a proprietary Denon Class-A power amp, a design that delivers unparalleled definition and openness, yet avoids the excessive heat, size and cost of traditional Class-A amplifiers

And, from our decade of experience since our invention of commercial digital recording (PCM), we equipped the DRA-600 with a digitally synthesized tuner stage for the most precise station tuning with the lowest distortion. Plus we added the convenience of eight AM and Eight FM presets with automatic station scanning. The DRA-600 from Denon, where innovation is a tradition.

 

Features

Non-switching class-A amplifier with large output power

Quartz-PLL frequency synthesizer for accurate tuning

Built-in head amplifier for MC type cartridge

Elegant , clean design with optional wooden cabinet

 

Specifications

Power Amplifier Section

Type:  Non-switching Class-A amplifier

Music Power:  120 W + 120 W at 4 Ω

Output Power:  60 W per channel, min. RMS , both channel driven, at 8  hm from 20 Hz to 20 kHz, no more than 0,08% Total Harmonic Distortion;

Intermodulation Distortion:  0,03%

Signal-to-Noise Ratio:  82 dB

Power Bandwidth:  5 Hz - 100 kHz (T.H.D. 0,5%)

Frequency Response:  20 Hz - 20,000 Hz ±0,5 dB

Input Sensitivity/Impedance:  2,5 mV/47 k Ω

Tone Controls

Bass :  ±10 dB at 100 Hz

Treble :  ±10 dB at 10 kHz

Loudness Control:  Low (+8 dB at 100 Hz); High (+4 dB at 10 kHz)

Crosstalk:  70 dB

FM Tuner Section

Tuning Frequency:  88 - 108 MHz

Usable Sensitivity:  1,7 µV (9,8 dBf)

Effective Selectivity:  60 dB

Signal-to-Noise Ratio

Stereo :  70 dB

Mono :  75 dB

Total Harmonic Distortion

Stereo :  0,30%

Mono :  0,15%

Frequency Response:  20 - 15,000 Hz +0,2 dB -1,5 dB

AM Tuner Section

Tuning Frequency:  525 - 1605 kHz

Usable Sensitivity:  53 dB

Effective Selectivity:  30 dB

Signal-to-Noise Ratio:  55 dB

Power Supply:  AC 120 V 60 Hz or AC 220/240 V 50/60 Hz

Power Consumption:  130 W

Dimensions (W x H x D):  434 x 112 x 390 mm

Weight:  10 kg

 

Sony STR-VX450 receiver

High performance Direct Access Receiver with VCR capability

Features

Direct Access quartz frequency synthesis tuning

Audio-Video control center for easy connection with video equipment

Legato Linear amplifier circuitry

 

Key Selling Feature Audio-Video control

The integration of audio and video equipment is finally a reality. Stereo video-cassette recorders, stereo videodiscs and monitors are taking their places beside audio equipment. The STR-VX450 provides your customer with connection facilities for all these video systems. You can hook up two video sources, such as a VCR, videodisc, or monitor TV. Plus, you can even dub from one VCR, to another. The advantage? High fidelity sound. Not the flat, lifeless sound normally associated with video. Your customers obtain it simply and easily through the STR-VX450.

Key Demonstration

Assemble the most complete audio/video system possible Demonstrate a stereo video-cassette or videodisc with the Sony receiver and a pair of separate speakers. Make sure to pick an impressive program. Point out that the consumer needs this type of hookup to appreciate the full benefits of the video sound source. A/B with video playback through mono television speakers.

Convenience Features

Audio Video Control Center - permits hookup for TV picture and sound, stereo video-cassette recorders, stereo video-cassette players. Tape copy possible from VCR-2 to VCR-1

Direct Access - design operates like a calculator keypad. Select AM or FM, then enter the frequency numbers of the station. For instance, to tune 104,30 FM, enter FM, then punch in one-zero-four-three-zero.

10 station AM or FM presets - for fast , esy selection of your favorite station

Memory scan - provides a 4 second sample of each preset station

Station Card - insert to mark preset stations

Auto tuning - between FM stations

Fluorescent display - indicates station frequency and function

Memory backup system - retains settings - even if the receiver is unplugged

Connections for two audio tape decks - with tape copying possible

VCR audio dubbing capability

Speaker switch for A, B. A &B, OFF

Technology Features

Quartz frequency synthesis - provides the most accurate, the most convenient tuning available

Sony's exclusive Direct Comparator - provides exceptionally quiet FM reception

Impedance speaker switch - 8 Ω  / 4 Ω  for compatibility with all speaker types

Legat Linear - amplifier circuitry eliminates switching distortion and dramatically lowers crossover distortion

 

Specifications

Amplifier Section

Continuous Power Output (RMS)

40 watts per channel, both channels driven into 8 Ω  from 20 Hz to 20 kHz, at no more than rated Total Harmonic Distortion.

40 watts per channel, both channels driven into 4 Ω  from 20 Hz to 20 kHz, at no more than rated Total Harmonic Distortion.

Total Harmonic Distortion

0,008% from 20 Hz to 20 kHz , at rated output , 8 Ω

0,02% from 20 Hz to 20 kHz, at rated output, 4 Ω

Intermodulation Distortion

0,008% (60 Hz : 7 kh = 4:1) , at rated output , 8 Ω

0,02% (60 Hz : 7 kh = 4:1), at rated output, 4 Ω

Damping Factor:  35

Frequency Response

Phono : RIAA standard curve +0,5 dB -0,5 dB

Tape, Aux :  10 Hz - 70,000 Hz -1 dB

Video :  10 Hz - 70,000 Hz -1 dB

Input Sensitivity/Impedance

Phono:  2,5 mV/ 50 k Ω

Tape, Aux :  150 mV/50 k Ω

Video :  150 mV/50 K Ω

Signal-to-Noise Ratio

Phono :  77 dB (IHF-A); 75 dB (new IHF) at 2,5 mV

Tape, Aux :  100 dB (IHF-A); 80 dB (new IHF) at 150 mV

Video :   100 dB (IHF-A); 80 dB (new IHF) at 150 mV

Speaker Impedance

4 - 16 Ω  A or B

8 - 16 Ω  A and B

Tuner Section

Usable Sensitivity

Mono :  11,2 dBf 92,0 µV)

50 dB Quieting Sensitivity:

Mono :  17,3 dBf (4,0 µV)

Stereo :  38,3 dBf (45 µV)

Signal-to-Noise Ratio

Mono :  80 dB

Stereo :  75 dB

Total Harmonic Distortion at 1 kHz

Mono :  0,15%

Stereo :  0,25%

Alternate Channel Selectivity, 400 kHz :  60 dB

Frequency Response:  30 Hz - 15,000 Hz +0,5 dB -2 dB

Stereo Separation:  45 dB at 1 kHz

AM Suppression:  54 dB

AM Sensitivity:  300 µV/m (built-in antenna)

AM Signal-to-Noise Ratio:  54 dB at 50 µV/m

AM Selectivity:  40 dB

General

Power Supply:  AC 120 V, 220 - 240 V, 50/60 Hz

Power Consumption:  90 watts (UL)

Power Outlets:  100 Watts switched; 100 Watts unswitched

Dimensions (W x H x D):  430 x 105 x 305 mm (17" x 4-1/4" x 12-1/8")

Weight:  6,2 kg (13 lbs 11 oz)

 

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)