Kenwood KA-7002 (1971)

A far higher grade stereo amplifier than any previous Kenwood model, the KA-7002 is a tribute to Kenwood's philosophy  that only the purest sound satisfies listener's ears.  By use of the direct coupling circuitry with pure complementary-symmetry driver stage, which means all interstage coupling capacitors are eliminated, its sound quality is purified to ensure ideal frequency response, very lowest Im distortion and improved damping factor characteristics. The KA-7002's superiority has been finally verified and guaranteed through the series of listening tests as well as through the technical measuring and simulations. That means every figure, every feature of KA-7002 is hundred percent alive. 

 Special FEATURES

All stages direct coupling circuitry and pure complementary symmetry driver stage ensure superb frequency response, ultra-wide power bandwidth, large damping factor, lowest IM distortion, etc.

Improved NF type equalizeer stage for wide dynamic range.

2dB step type accurate tone controls with 2 step turnover switches and complete defeat switches.

Low filter either at 40 Hz or 80 Hz with  sharp 18dB/oct cutoff.

Impedance selector for phono input (30 or 50 Kohms)

Low level phono input (0,06mV).

Exclusive Null Balancer brings perfect stereo balance.

3 pairs speaker outputs and front panel selector switch.

Tape monitor and dubbing switch for 2 tape decks.

4 channel input, output terminals and volume control.

Pre-amplifier output jacks and main amplifier input jacks.

 Excellent Frequency Response

Since KA-7002 employs full stage direct coupled circuit in the main amplifier unit, without coupling capacitors, DC amplification becomes almost possible. Frequency response is, therefore, largely improved and other various characteristics are enhanced with sufficient feedback. The output impedance is always flat, from ultra-low frequency to high-frequency, and has no boost in low frequency range due to output capacitor.

Stable Output & Low Distortion Factor

In an asymmetrical power supply using output capacitors, the maximum output decreases in the ultra-low path range due to limited capacitance. The power supply in KA-7002 is symmetrical on both upper and lower sides. The output in the ultra-low path range will not decrease and the output is always stable. Since transistor functions are the same in the upper and lower half cycle of the input signal, cross-over distortion and switching pulse components can be eliminated, which has been inevitable in conventional semi-complementary circuits. Consequently, distortion at the low output level becomes very small.

High Damping Factor

In order to enhance DC stability, the differential amplifier circuit is composed of high temperature characteristic transistors in the first and pre-drive stage and by use of zener diode the supply voltage in the first stage circuit is stabilized with 100% DC feedback applied. This eliminates deterioration of mechanicalstatic due to a direct current flowing in the voice coil  of the speaker. Also, this differential amplification is done in the direct coupled circuit, good phase characteristics are attained. And damping factor with reference to the speaker is improved up to 45 (at 8 ohms) without descending down at lower frequency range.

Three Stage Direct Coupled NF-Type Equalizer

The equalizer circuitry is made up of 3-stage direct coupled, NF-type having a wide dynamic range. This was developed from the circuitry in the KA-6000 whose excellent characteristics and power voltage, a wide dynamic range is obtained.

Precise Tone Controls

Tone control is variable in 2dB steps. Turn over roll off is switchable into 2 stages, 150 or 300 Hz in Bass and 2 kHz or 6 kHz in Treble. In order to eliminate slight osoillation at flat position, the cancellation can be operated by both level control knob and the independent defeat switches.

Protection Circuit

Asthe main unit consists of direct coupled circuits, the protection circuit differs from conventional layouts in which the first stage power supply is disconnected. This type system suppresses current to the output transistors by PC detection system using a current limiter through which no input signal is applied in the driver stage when large current flows to the output transistor. When this protection circuit operates, no DC voltage is produced at the output terminal.

Sharp Cut Filter

In order to eliminate noise due to resonance of arm, motor noise wow and flutter, scratch, etc., without deterioration of tone quality an 18 dB/oct filter is built-in. Also, in order to prevent schock noise created during switch operation, strictly selected tantal solid capacitor with a leak current below 1 mA is used.

Mode Switch For 4-channel Reproduction

Besides the conventional 2-channel use, the mode switch circuit has input/output terminals and control volume for 4-channel stereo and functions as a 4-channel control amplifier.

Perfect Balance Control System

In order to obtain left and right output balance, a sound source has been conventionally set to the center of the right and left speakers by setting Mode to Mix. In the KA-7002 a null balance system has been adopted so that sound is disappeared when right and left levels become even, as a result, total balance from the cartridge to the amplifier can be fully obtained by manipulation of the Null Balance while playing monaural disc.

 Unlimited Capability and Usability of KA-7002

The concentrated terminals on the rear panel show the KA-7002 is capable for all the program sources and has wide usability which meets any of the critical audiophile' requirements.

The KA-7002 is able to play the leading role of the highest music system.

Phono 1 - Connect moving magnet type cartridge. Load impedance is switchable (30 or 50 kohms)

Phono 2 - Input sensitivity of 0,06 mV. Low output moving coil type cartridge can be dirctly connected.

Mic - By 2 microphones, stereophonic reproduction is enjoyable. In case one mike is used, the sound is made monaurally from both speakers.

4-Channel - Input and output terminals for 4-channel reproduction. With Mode Switch equipped on the front panel, KA-7002 can control 4-channel music system.

Normal/Separate Switch - At normal side, pre-amplifier and main-amplifier are combined. At separate side, they are individually separated.

Tape Recorder - 2 pairs of tape-play and tape-rec jacks and 2 DIN connectors. Dubbing and monitoring of A→B, B→A decks are available.

Speakers - 3 pairs of speaker system are connectable. Selector switch on the front panel offers 5 varietes of thier combinations.

AC Outlets - 3 switched outlets for total 300 watts and 1 unswitched for 100 watts.

Specifications

Total Dynamic Power (both channel, IHF):

196 watts at 4 ohms

170 watts at 8 ohms

Continuous Power Output (each channel driven):

80/80 watts at 4 ohms

70/70 watts at 8 ohms

Continuous Power Output (both channel driven):

68/68 watts at 4 ohms

50/50 watts at 8 ohms

Harmonic Distortion:  less than 0,5% at rated output from 20 Hz to 20,000 Hz

Intermodulation Distortion (60 Hz & 7,000 Hz ; 4 : 1):

At rated output : Less than 0,3%

At -3 dB rated output : less than 0,1%

Frequency Response:  20 Hz to 50,000 Hz ±1 dB

Sensitivity (for tared output at 8 ohms load):

Phono 1 : 2,5 mV

Phono 2 : 0,06 mV  or  2,5 mV

Mic : 2,5 mV

Tuner, Aux 1, 2 :  200 mV

Tape A, B : 200 mV

Main amp input : 1 V

Input Impedance (at 1 kHz):

Phono 1 : 30 or 50 kohms

Phono 2 : 200 ohms (0,06 mV);  50 kohms (2,5 mV)

Mic : 50 kohms

Aux 1, 2 : 100 kohms

Tape A, B : 100 kohms

Main amp input : 50kohms

Signal-to-Noise Ratio (below rated output):

Phono 1 : 65 dB

Phono 2 : 45 dB (0,06 mV);  65 dB (2,5 mV)

Mic : 67 dB

Aux,  Tuner, Tape  : 77 dB

Noise at minimum volume control 0,5 mV at 8 ohms or 0,0003 milliwatts

Damping Factor:  90 at 16 ohms load;  45 at 8 ohms load

Low Filter (for rumble):  80 Hz and 40 Hz cutt-off, 12 dB per octave

High Filter (for scratch):  7,000 Hz cut-off, 12 dB per octave

Bass Control:  ±10 dB at 100 Hz with 2 dB step switch (tone control switch at 300 Hz)

Treble Control:  ±10 dB at 10,000 Hz with 2 dB step switch (tone control switch at 2 kHz)

Turnover roll off freq: 

Bass : 150 Hz, 300 Hz, defeat

Treble : 2 kHz, 6 kHz, defeat

Input:

Pair of Phono 1, Phono 2; Mic, Aux 1-2; Tape Play A, B; 4 channel and main amp.inputs

Output:  3 pairs of stereo speaker outputs (4 to 16 ohms); pre-amplifier  outputs;  headphone jack; low level mono output; Tape recording outputs A and B, DIN standard tape Rec/Play connector A and B; switched and unswitched AC outlets and 4 channel output

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

Power Consumption:  15 watts at no signals , 275 watts at full power

AC Outlets:  3 switched, 1 unswitched

Dimensions (W x H x D):  408 x 134 x 280 mm (16-15/16'' x 5-5/32'' x 11-1/32'')

Weight:  10 kg  (22,1 lbs)

Kenwood KA-5002

 Kenwood KA-5002 (1971) is Direct coupling Stereo amplifier  and offering less power than some other stereo amplifiers, the 150 watt (IHF) KA-5002 also manages to achieve a true audio eminence in the presentation of pure sound. Superb frequency response and ultra-wide bandwidth with lowest-possible IM distortion are achieved through the KA-5002's all stages direct coupling circuitry and pure complementary-symmetry driver stage. All the other thousand-an-one Kenwood quality extras are included to make this an ideal stereo system.

 Special features

All satges direct coupling circuitry and pure complementary symmetry driver stage ensure superb frequency response, ultra-wide power bandwidth, large damping factor, lowest IM distortion, etc.

Improved NF type equalizer circuit provides wide dynamic range.

2 dB step type accurate tone controls for bass and treble.

Impedance selector for phono input (30 or 50 kohms)

Exclusive null balancer brings perfect left/right channel balance.

Tape monitor and dubbing switch for 2 tape decks.

4 channel input, output terminals and mode switch on the front panel.

Exclusive low level phono input (0,06 mV)

Two pairs speaker terminals and selector switch on the front panel.

Pre-amplifier output and main-amplifier input jacks.

Specifications

Total Power Output (both channel):

180 watts ±1 dB at 4 ohms

140 watts ± dB at 8 ohms

Total Dynamic Power (both channel, IHF):

150 watts at 4 ohms

120 watts at 8 ohms

Continuous Power Output (each channel driven):

60/60 watts at 4 ohms

50/50 watts at 8 ohms

Continuous Power Output (both channel driven):

48/48 watts at 4 ohms

30/30 watts at 8 ohms

Harmonic Distortion:  less than 0,5% at rated output from 20 Hz to 20,000 Hz

Intermodulation Distortion (60 Hz & 7,000 Hz ; 4 : 1):

At rated output : Less than 0,3%

At -3 dB rated output : less than 0,1%

Frequency Response:  20 Hz to 50,000 Hz ±1 dB

Sensitivity (for tared output at 8 ohms load):

Phono 1 : 2,5 mV

Phono 2 : 0,06 mV  or  2,5 mV

Mic : 2,5 mV

Tuner, Aux 1, 2 :  200 mV

Tape A, B : 200 mV

Main amp input : 1 V

Input Impedance (at 1 kHz):

Phono 1 : 30 or 50 kohms

Phono 2 : 200 ohms (0,06 mV);  50 kohms (2,5 mV)

Mic : 50 kohms

Aux 1, 2 : 100 kohms

Tape A, B : 100 kohms

Main amp input : 50kohms

Signal-to-Noise Ratio (below rated output):

Phono 1 : 65 dB

Phono 2 : 45 dB (0,06 mV);  65 dB (2,5 mV)

Mic : 67 dB

Aux,  Tuner, Tape  : 77 dB

Noise at minimum volume control 0,5 mV at 8 ohms or 0,0003 milliwatts

Low Filter (for rumble):  80 Hz cutt-off, 12 dB per octave

High Filter (for scratch):  7,000 Hz cut-off, 12 dB per octave

Bass Control:  ±10 dB at 100 Hz with 2 dB step switch

Treble Control:  ±10 dB at 10,000 Hz with 2 dB step switch

Input:

Pair of Phono 1, Phono 2; Mic, Aux 1-2; Tape Play A, B; 4 channel and main amp.inputs

Output:  2 pairs of stereo speaker outputs (4 to 16 ohms); pre-amp. Outputs; Tape recording outputs A and B, DIN standard tape Rec/Play connector A and B; switched and unswitched AC outlets and 4 channel output

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

Power Consumption:  15 watts at no signals , 200 watts at full power

AC Outlets:  3 switched, 1 unswitched

Dimensions (W x H x D):  408 x 134 x 280 mm (16-15/16'' x 5-5/32'' x 11-1/16'')

Weight:  9,1 kg  (20 lbs)

JBL - Ranger Metregon C45

 The  JBL Metregon (1960) is the first speaker system to offer full-field stereo reproduction in an enclosure of moderate size. Two completely separate full-range speaker systems are housed in the Metregon. Sound from these two sets of speakers is integrated by the curved refractor panel, making use of the same acoustic principles as the JBL Ranger Paragon. The result is a full-dimensional sound stage six feet wide. There is no "hole in the middle", no "split soloist", to mar the illusion of a real performance.

Like the Paragon, the JBL Metregon projects perfectly balanced stereophonic sound to every listener in the room, regardless of seating position. Like the Paragon, it also performs superbly as a monaural reproducing system.

The JBL Metregon C45 is selected by the pasadena Art  Museum for showing in tri-annual industrial design exhibition.

 The curved refractor panel used exclusively in JBL integrated stereo systems integrates the two separate stereo channels into a single three-dimensional sound source. It not only produces a smooth transition from one source of sound to the other, but disperses the sound pattern over a wide area.

The two separate full-range speaker systems housed in the Metregon face into the edges of the refractor panel. Sound generated by these speakers tends to flow along the curved surface of the panel. It is projected outward from the refractor by a complicated interplay of reflection and constructive interference. The listener hears sound directly from the loudspeakers as it is projected across the full width of the curved acoustic refractor. Individual instruments are pinpointed at the position they were recorded. The effect is comparable to dimensions achieved when a moving picture is projected on a wide curved screen.

Since the JBL Metregon generates a stereophonic sound field within the loudspeaker system itself, there is no need to sit in a particular location to hear three-dimensional sound. Every listener in the room hears a single blended performance, just as if the artist were actually in the room.

 Additional loudspeakers which can be accommodated in the C45 enclosure.

Since both the low and high frequency drivers face into the curved refractor panel, other JBL loudspeaker systems, in addition to the 205 system , can be installed in the Metregon. Pairs of JBL Extended Range Speakers D123, D130 or D131 can be used alone. These can be built up to two-way systems by addition of the JBL 075 High Frequency Driver and the N2400 Dividing Network. In addition, the JBl Stereo Systems 201 and 282 can be installed.

The list of the components used in the eight basic JBL systems compatible with the C45 Metregon enclosure.

Loudspeaker Components used in the JBL Metregon

The Metregon reproducer is designed especially to match the JBl 205 loudspeaker system. This consist of two matched sets of components. Each set includes a JBL 130A low frequency driver,  model 275 high frequency driver, H5040 cast exponential horn, and N600 crossover network. The bass driver are loaded by individual matched-reflex chambers. A low crossover frequency of 600 Hz enables the radiant dispersion principle to be utilized to best possible advantage.

 Components Specifications

JBL 130A - Maximum efficiency low frequency loudspeakers designed primarily for use with the 175 DLH high frequency assembly. The 130A have 4" edgewound copper ribbon voice coil and long magnetic gaps for crisp reproduction of bass tones. Normally,a single 130A is used together with the 175DLH and N1200 dividing network, in larger enclosures where two bass drivers can be installed. For reflex or horn-loaded enclosures.

Impedance:  16 ohms

Power Capacity:  25 watts

Free Air Cone Resonance:  29 cps

Frame: Rigid cast aluminum

Field:  Permanent Alnico V Magnet

Magnetic assembly:  11,5 lbs

Weight:  23 lbs (shipping)

JBL 275 - This new driver is a more massive version of the well-known JBL 175. Newly designned magnetic circuit with increased gap energy results in improved linearity at highest audio frequencies. For 2-way systems crossing over at 600 Hz

Impedance:  16 ohms

Flux density:  18,500 gauss

Voice coil diameter:  1-3/4"

Power Capacity:  25 watts above 500 Hz

Weight:  15 lbs (shipping)

JBL H5040 - Cast aluminum exponential  horn. Used with 175 and 275 drivers in JBL systems crossing over at 600 Hz and above. Designed primarily for JBL-Ranger Mertregon

Weight:  5 lbs (shipping)

 JBl N 600 - The dividing networks on this page are constructed of highest quality precision components, hand wired and individually checked to meet precision component tolerances. A 3 position switch allows the intensity of the high frequency trasducer to be adjusted for optimum results in any acoustic surroundings. Used with JBL 130A or 130B bass drivers and 275 high frequency driver

Attenuation:  12 dB per octave on each side of crossover frequency

Crossover Frequency:  600 Hz

Impedance:  16 ohms

Dimensions:  4-3/4" x 6" x 6-1/4"

Weight:  10 lbs (shipping)

The JBL C45 enclosure is available in the following fine wods and finishes: light or dark Walnut, light or dark Mahogany, light Oak, Salem Maple, Natural Birch, Korina and Ebony.

Dimensions

Height:  30"

Width (top):  73-11/16"

Depth:  22-1/2"

Pioneer SA-500A (1972)

 Pioneer model SA-500A (1972 -1974) a budget-price sollid-state stereo integrated amplifier with musical power of up to 44 watts and wide frequency response.

Pioneer's low-priced stereo components are designed and manufactured to meet the special demands of the man who is building his system of hi-fi components on a budget. While usually offering a little less in power and versatility, these Pioner units spare nothing in terms ofquality engineering and performance. The SA-500A integrated amplifier is no exception. Using long-life, low-noise silicon transistors throughout, the SA-500A is featured by a very wide frequency response and superb signal-to-noise ratio. It gives you music power output of up to 44 watts (at 4 ohms), and may be used with up to two tape decks, two turntables, a tuner and one other auxiliary source. The SA-500A can also drive up to two sets of speaker systems simultaneously or separately. And it's priced to fit into any stereo budget.

 Direct Coupling Preamplifier Section

So that its dynamic range is very wide, the equalizer circuit of the SA-500A uses two-stage direct coupling negative feedback circuit with low-noise silicon transistors. For professional tone control, the unit offers click-stop-type individual bass and treble controls that allow you to increase or decrease the audio signal delivered to the amplifier in measured steps. Thus, signals delivered from the unit sound the way you want them to.

Power Amplifier Section

The power amplifier section of the SA-500A is equipped with quasi-complimentary single ended push-pull circuit to ensure distortion-free sound reproduction and a wide frequency response. Music power output of the unit is 44 watts (measured at 4 ohms), more than you'll ever need to fill your music room with spectacular soild sound. The SA-500A can handle up to two different pairs of speaker systems, either separately or simultaneously, giving you the extra versatility of playing a small set of speakers in a room adjacent to your regular music listening room. The unit also lets you easily compare noe set of speakers with another, or lets you select the appropriate speaker unit when systems are placed in different rooms.

  Two Phono Inputs

The SA-500A is equipped with all necessary input terminals to allow you to built a perfect components system. It has two sets of phono input terminals in addition to a tuner  and an auxiliary terminal. You may, if you wish, connect two turntables simultaneously. Or you may also use the jacks provided to compare two different cartridges or turntables.

Two Tape Deck Terminals

The SA-500A has two pairs of Tape Rec and Monitor terminals so that you may operate two tape decks simultaneously choosing from an open-reel deck, a cassette deck or an 8-track cartridge tape deck. This feature permits easy tape-to-tape duplicating.

Specifications

Music Power Output (IHF): 44 watts at 4 Ω;  36watts at 8Ω

Continuous Power Output (each channel driven):  16 watts/16 watts at 4Ω;  13 watts/13 watts at 8Ω

Continuous Power Output (Both Channel Driven):  12 watts + 12 watts at 4Ω;  10 watts + 10 watts at 8Ω

Harmonic Distortion:  Less than 0,5% (continuous power output)

IM Distortion:  Less than 0,7% (continuous power output)

Power Bandwidth (IHF):  20 to 40,000 Hz (8Ω, 0,5% THD)

Frequency Response (Aux):  30 to 50,000 Hz +1 dB  -2 dB

Input Sensitivity/Impedance (1kHz for rated output):

Phono 1 Mag : 2,5 mV/50 kΩ

Phono 2 Mag : 2,5 mV/50 kΩ

Tuner : 200 mV/100 kΩ

Aux 1, 2 :  200 mV/100 kΩ

Tape Monitor 1, 2 : 200 mV/100 kΩ

Recording Output:

Tape Rec 1, 2  (pin jack) : 200 mV

Tape Rec (DIN connector) : 30 mV

Controls:

Bass : -11 dB,  +12 dB ( at 100 Hz)

Treble : -10 dB,  +9,5 dB (at 10 kHz)

Loudness Contour : +10 dB/100 Hz;  +5,5 dB/10kHz (with volume control set at -40 dB)

Phono Equalization Curve:  RIAA standard

Hum and Noise (IHF):

Phono : more than 75 dB

Tuner, Aux : more than 90 dB

Channel Separation (IHF):

Phono : more than 50 dB

Tuner, Aux : more than 55 dB

Speaker Impedance : 4 Ω to 16 Ω

Damping factor:  40 (8Ω, 1kHz)

Power Requirements:  110, 120, 130, 220, 240 V AC, 50/60 Hz

Power Consumption:  75 watts Max

Dimensions (W x H x D):  330 x 118 x 316 mm ( 13" x 4-5/8" x 12-7/16")

Weight:  5,5 kg (12 lb 2 oz ) net

Pioneer SA-500 (1969)

 Pioneer model SA-500 (1969 - 1972) 44 watt Solid State Integrated Amplifier

This is an efficient medium-range pre/main amplifier built to very high specifications for this size of unit. It has a set of controls, inputs and outputs for versatile operation of speakers and tape recorders. Main amplifier total power is strong at 44 watts at 4 ohms. Circuitry is all solid state and includes low-noise silicon transistors. For those who want to enjoy full stereophonic realism the SA-500 is the set.

 Features of the SA-500

Excellent Preamplifier Performance

The low-noise silicon transistors are included in the preamplifier section and are vital for the very best signal-to-noise ratio and distortion free sound. Distortion at 44 watts is less than 0,5% at 1kHz IHF

Truly precise Tone Controls

Unlike most amplifiers, in which tone control is only approximate, the SA-500 offers truly acurate tone control through individual bass and treble. Signals really come out as you want them.

Powerful Main Amplifier

The main amplifier section puts out 36 watts in music power at 8 ohms with distortion less than 0,5% at 1 kHz (IHF). That will give you room-shaking performance where and when you want it. It has two sets of auxilliary inputs to make it a very versatile part of your stereo system.

Exceptional Flexibility

The SA-500 is fully equipped with speaker outputs, tape recording/playback connector, loudness contour and astereo headphone jack.

Specifications

Audio Section

Circuitry:  Quasi-complementary single ended pus-pull circuitry

Music Power Output:  44 watts at 4Ω;  36 watts at 8Ω

Continuous Power Output:  16 W/16W at 4Ω;  13W/13W at 8Ω

Continuous Power Output (both channel driven):  12W + 12W at 4Ω;  10W + 10W at 8Ω

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

Frequency Response:  20 Hz to 50 khz ±1 dB (Aux)

Power Bandwidth:  20 Hz to 40 kHz (distortion below 0,5% constant/IHF)

Signal-to-Noise Ratio (volume max; tone flat, at the rated output)

Phono :  75 dB

Aux : 90 dB

Inputs and Gain, Input Impedance (1 kHz):

Phono : 2,5 mV/47 kΩ

Tuner, Tape, Aux : 200 mV/10 kΩ

Damping Factor:  Better than 40 at 8 Ω at 1 khz

Output Terminals and Jacks:

Speakers : 4 to 16 Ω

Stereo headphone jack,

Simultaneous tape recording jack,

Tape rec/play connector, DIN standards

Phono Equalization Curve:  NFB type RIAA

Tone Controls:

Bass : -13,5 dB to +13 dB (at 50 Hz)

Treble : -11 dB to +8 dB (at 10 kHz)

Loudness Contour (switchable On/Off):  +12 dB at 50 Hz ; +5,5 dB at 10 kHz (at volume level of -40 dB)

Residual Noise:  less than 0,7 mV at 8Ω (volume minimum, tone flat)

General Sction

Power Supply:  Full-wave rectifier using silicon diodes

Line Requirements:  110, 117, 130, 220, 240 volts AC; 50/60 Hz

Power Consumption:  65 VA, 55 W (Max)

Dimensions (W x H x D):  330 x 118 x 313 mm (13" x 4-5/8" x 12-5/16"

Weight:  6 kg (13,2 lbs)

  

Rotel RX-400A

 All Solid State Design with Silicon Output Transistors.

FET Front End Tuner.

Ceramic Filter

Rotary Controls;  Dual Bass, Dual treble, , Balance, Volume, Function Selector and Tuning.

Push Buttons;  Power, Speaker 1, Speaker 2, Mode,  Loudness, Tape Monitor .

Illumunated Dual Purpose Signal  Strength  .

Illumunated FM Center Tuning Meter.

Illuminated  Dial Board.

Stereo Indicator and Function Indicator Lights.

Front Panel Headphone jack.

Rear Panel Speaker Matrix Switch for simulated 4-channel.

Pre-Amp Outputs and Main-Amp Inputs.

Handsome Wood Cabinet

 Above model produced in Japan, below the European version

Specifications 400A

Amp Section

Total Music Power (IHF):  80 W (4 ohms); 50 W (8 ohms)

Continuous Power (RMS):  22 W/Ch (4 ohms);  20 W/Ch (8 ohms)

Harmonic Distortion:  0,2%

IM Distortion:  0,4%

Frequency Response:  15 - 50,000 Hz

Power Bandwidth (IHF):  25 - 30,000 Hz

Speaker Impedance:  4, 8, 16 ohms

Tuner Section

Sensitivity (IHF)

FM :  2,5µV

AM : 30µV

Harmonic Distortion: less than 1%

S/N Ratio:  better than 60 dB

IF Rejection (FM) :  better than 70 dB

Image Rejection (AM) :  40 dB

Stereo Separation:  better than 35 dB

General

Power Voltage:  AC 100, 117, 220, 240 V, 50/60 Hz

Dimensions (W x H xD):  17-1/8" x 5" x 12-1/2"

Weight:  7 kg (15,4 lbs)

Rotel RX-200A

 All Solid State Design with Silicon Output Transistors.

FET Front End Tuner.

Rotary Controls;   Bass, Treble, Balance, Volume . Function Selector and Tuning.

Push Buttons;  Power, Speaker 1 and Speaker 2, Loudness, Tape Monitor .

Illumunated AM/FM Signal Strength Tuning Meter.

Illuminated Dial Board.

Stereo Indicator  Lights.

Front Panel Headphone jack.

Rear Panel Speaker Matrix Switch for simulated 4-channel.

Handsome Wood Cabinet

Specifications 200A

Amp Section

Total Music Power (IHF):  40 W (4 ohms);  26 W (8 ohms)

Continuous Power (RMS):  13 W/ch (4 ohms);  10 W/ch (8 ohms)

Harmonic Distortion:  less than 0,5%

IM Distortion:  0,5%

Frequency Response:  30 - 30,000 Hz

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

Speaker Impedance:  4, 8, 16 ohms

Tuner Section

Sensitivity (IHF)

FM :  3,0µV

AM : 30µV

Harmonic Distortion: less than 1%

S/N Ratio:  better than 60 dB

IF Rejection (FM) :  better than 70 dB

Image Rejection (AM) :  40 dB

Stereo Separation:  better than 34 dB

General

Power Voltage:  AC 100, 117, 220, 240 V, 50/60 Hz

Dimensions (W x H xD):  14-1/4" x 4" x 8-1/4"

Weight:  5 kg (11 lbs)

Sony TC-K65

The Sony TC-K65 shares much in common with the TC-K61. Both decks incorporate Sony's smooth, two-motor and high-torque spooling motor. Both machines have the Sendust and Ferrite record/playback head for superior dynamic range and low distortion. And the K65 has the same microprocessor logic function sequencing and the same LED Peak program Meters as theK61. What distinguishes the K65 are two important operating modes: mic/line mixing in record, and Sony's extraordinary Random Music Sensor (RMS) in playback. With these features, the K65 achieves a new level of versatility and convenience.

Mic/Line Mixing

For recording flexibility the microphone and line-level inputs of the K65 can be mixed. Thus, you can record simultaneous music and narration, or add your own musical material to recordings of broadcasts and discs. The K65 facilitates input mixing with independent level controls for left and right "mic" and line inputs, along with a convenient master record level control.

Random Music Sensor

The TC-K65 incorporates Sony's RMS (Random Music Sensor) a system that can be programmed to automatically locate and play individual selections of music. Working in conjunction with the transport microprocessor, the RMS allows you to hear a cassette's musical selections in any sequence you choose. For example, you can listen to the third selection, and then the ninth and the second automatically.   You enter the desired sequence into the RMS using the "program" and "memory" buttons. With RMS, the deck automatically fast-forwards or rewinds locates the selection and plays. The numersal display glows to indicate each selection, RMS can distinguih up to fifteen selections on a single cassette side. ANd you can program up to sixteen instructions, including selection replays.

 You can also take advantage of the RMS without programming, RMS provides the ability to "skip" back to the beginning of a selection or "skip" forward to the beginning of the next selection.

These responsive functions of the RMS, along with AUto Play, Memory Stop and Memory Play timer operation and remote control capability make the Sony TC-K65 exceptionally convenient and effortless to use. With the K65, it is easier than ever before to hear exactly the music you want to year, exactly when you want to hear it.

Features

Two number of Heads.  Sendust and Ferrite Record/Play Head and 4-GapFerrite Erase Head.

Metal tape capability.

Four tape selector positions

Patented Direct-Coupled Playback Amplifier

Dolby Noise. Reduction with Sony's exclusive Dolby IC, Switchable MPX Filter

Selected Electronic Parts for Low Noise and Low Distortion

FET Buffer Power Supply

Two Numbers of Motors.Capstan BSL Spooling, High-Torque.

Belt Drive Type

Frequency Servo Type

Magnetic Clutch Assembly and Dynamically Balanced Flywheel

Feather Touch Transprt Control Type

Auto Play Repeat Control and Memory Cue Control

Safety-Load Machanism

Peak LEDs Meter Type 16 x 2

Double-Indication Peak Hold

Dual Concentric Record Level Controls

Specifications

Fast-Forward/Rewind Time (C-60):  80 sec.

Wow and Flutter:  0,04% (WRMS), 0,12% (DIN 45507)

Frequency Response (±3 dB, Re: -20 dB)

Metallic Tape : 30 - 17,000 Hz

FeCr Tape : 30 - 17,000 Hz

EHF Tape : 30 - 16,000 Hz

SHF Tape : 30 - 15,000 Hz

Re: 0 dB Metalic Tape : 30 -13,000 Hz

Signal-to-Noise Ratio ( Dolby NR Off, Re: 3% THD, Peak, IHF-A Wtd.)

Metallic Tape : 59 dB

FeCr Tape : 59 dB

EHF Tape : 57 dB

SHF Tape : 53 dB

Improvement with Dolby NR On :  Up to 5 Db at 1 kHz, 10  Db at 5 kHz or above

Total Harmonic Distortion (1 kHz, Re: 0 db Record level)

Metallic Tape : 0,9%

FeCr Tape : 1,0%

Crosstalk (1 kHz, tracks):  60 dB

Separation (1 kHz, channels):  35 dB

Erasure (400 Hz, incl. Metallic Tape):  60 dB

Bias Frequency:  105 kHz

Meter Range:  -40 dB, +8 dB

Line Input Sensitivity/Impedance:  77,5 mV/50 k ohms

Mic Input Sensitivity/Impedance:  0,25 mV/Low

Line Output Level:  435 mV

Line Output Load Impedance Nominal/Minimum:  50/10 k ohms

Headphone Output Level:  30,9 mV

Nominal Headphone Impedance:  8 ohms

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

Power Consumption:  26 W

Dimensions (W x H x D):  430 x 130 x 290 mm (17" x 5-1/8" x 11-3/8")

Weight:  5,7 kg (12 lbs 9 oz)

KEF Model 101

 Ever since the Celeste was released in 1962 KEF has been noted for producing high performance compact loudspeakers. The Cresta, released in 1967, set new standards with the newly developed B110 and T27 drivers that were later to be adopted in the world famous BBC designed LS3/5A broadcast monitor.

 KEF Model 101 is a truly outstanding product of modern loudspeaker technology. Although small in overall dimensions and simple appearance. Model 101 contains one of the most advanced sound reproduction systems ever developed and achieves a standard of acoustic performance superior to that of many for larger loudspeakers.

Model 101 is a loudspeakers of Reference quality which will satisfy the professional user and enthusiast whose amplifier and related equipment are of the highest standard, but who require small, unobtrusive loudspeakers.

Model 101 offers many advantages over larger models where space is restricted as the systems are easily located to give excellent tonal balance and sharp,clear stereo images. Novel and precise production methods guarantee the frequency response within fine limits  resulting in stereo reproduction of outstanding perspective and sharpness.

Model 101 combined the T27 tweeter with the SP1057 version of the B110 in a 6.7 litre closed box. The system was fully overload protected by the S-Stop system, included mechanical decoupling of the bass driver to minimize colouration and each pair were acoustically matched to within 0.5dB. The result was a system with accurate tonal balance and detailed stereo imaging - being suitable for use with the best electronics - and able to fit unobtrusively into the listening room.

Features

Flat frequency response to 90 Hz (-10 dB at 47 Hz)

Two way system with minimum interunit time deley

Pairing of systems guarantees sensitivity and frequency response match to within 0,5 dB

Fully protected against fault conditions when used with amplifiers up to 100 watts

Electronic protection -S-Stop protects against overload and fault conditions

 The laws  of physics dictate that a small enclosure must either give less bass or have lower efficiency. To achieve a balance response in the design of Model 101, KEF use a tonal system design approach so that the drive units, filter networks and enclosures are developed together to achieve the broadcast band width with the optimum efficiency.

The close tolerances needed to realise the full potential of the design are maintained in production by a unique matching procedure so that every pair of Model 101's is matched in frequency response to within 1dB of the original laboratory prototypes.

The widespread use of high powered amplifiers which can deliver the full dynamic range captured with modern recording techniques, has made it necessary to protect loudspeakers against accidental overload. In Model 101 a self-powered electronic circuit called S-Stop, protects the loudspeakers from the effects of overload and automatically re-connects the full input signal to the system only when the overload is removed.

To allow the sound to reach the listener directly without troublesome reflections from walls, floor or ceiling the drive units are arranged within the 7 litre enclosure so that the full frequency response is enjoyed when the loudspeakers are positioned approximately 75 mm from the floor.

An optional stand, the ULS 20, allows the speaker to be conveniently and elegantly converted to a free standing system.

Specification: Model 101 

System type:  Two-way, bookshelf/stand-mount

Enclosure type:  Closed box

Input Impedance:  8 ohms

Rated maximum power:  100 W programme

Amplifier Requirements:  20 - 100 watts per channel into 8 ohms

Frequency response:  90 - 30,000 Hz ±2 dB at 2m on measuring axis (-10dB at 47Hz and 40kHz)

Sensitivity:  81 dB at 1m for a pink noise input of 1W

Distortion (Measured at 1m on measuring axis at mean spl of 90 dB, anechoic conditions):

Second Harmonic : less than 1% from 120 Hz to 20 kHz

Third Harmonic : less than 1% from 70 Hz to 20 kHz

Directional Characteristics:

Horizontal : within ±2 dB of axial response up to 20 kHz for ±20°

Vertical : within ±2 dB of axial response up to 20 kHz for ±5°

Crossover Frequencies:  400, 2500 Hz

Maximum output:  100 dB on programme peaks under typical listening conditions

Finishes:  Walnut, teak, rosewood and black ash veneers

Grille:  Black cloth

Size:  340 x 180 x 190 mm (13.4 x 7.1 x 7.5 inches)

Weight:  5.6 kg (12.3 lb)

System:  SP1122

Drive units:  B110 bass/midrange unit (SP1057), T27 tweeter (SP1032)

Crossover:  SP1123 and SP1124 (SP2010 from 1983)