What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Sony TC-252 reel-to-reel

The Sony Model TC-252 is a four-track stereophonic/monophonic tape recorder for accurate-recording and playback, featuring built-in amplifiers and lid-integrated stereo speakers.

Special features are:
Vibration free motor
All-silicon transistor for exceptional low noise and distortion
Scrape flutter filter which eliminates undesirable tape modulation distrtion
Automatic sentinel shut-off and retractable pinch roller.
This model operates in either vertical or horizontal position and features dual VU meters for easy to read and the reel capacity is 7-inch.
Sound-on-sound facility of the TC-252 permits composite recording from left channel to right channel and vice versa with its selector switch. Sound with sound and public address are also featured.

Track System:  4-track stereo and mono
Reel Size:  7" 918 cm) maximum
Tape Speed:  7-1/2 ips, 3-3/4 ips and 1-7/8 ips (19 cm/s; 9,5 cm/s; 4,8 cm/s)
Recording Time (with 1,800 ft tape)
4-track Stereo
7-1/2 ips (19 cm/s) :  1,5 h
3-3/4 ips (9,5 cm/s) :  3 h
1-7/8 ips (4,8 cm/s) :  6 h
4-track Mono
7-1/2 ips (19 cm/s) :  3 h
3-3/4 ips (9,5 cm/s) :  6 h
1-7/8 ips (4,8 cm/s) :  12 h
Frequency Response
7-1/2 ips (19 cm/s) :  30 - 18,000 Hz
3-3/4 ips (9,5 cm/s) :  30 - 13,000 Hz
1-7/8 ips (4,8 cm/s) :  30 - 7,000 Hz
Signal-to-Noise Ratio:  50 dB or more
Wow and Flutter:  less than 0,12% at 7-1/2 ips (19 cm/s)
Power Output:  4 W max. Per channel
Recording Bias
Frequency :  approx. 85 kHz
Two Mic Inputs Sensitivity/Impedance:  0,19 mV (-72 dB) / 600 Ω
Two Aux Inputs Sensitivity/Impedance:  60 mV (-22 dB)/ 100 k Ω
Two Line Output Level/Impedance :  0,39 V (-6 dB) / 100 k Ω
Two Speaker Outputs Level/Impedance:  2,7 V (+11 dB) / 8 Ω load
Phone Output level/Impedance:  30 mV (-28 dB) / 8 Ω
Speaker:  two 5" (130 mm) dynamic speakers
Voice coil Impedance:  8 Ω
Semiconductors:  20 Transistors; 3 Diodes
Power Requirements/ Consumption:  117 V AC 60 Hz / 45 W
Dimensions (W x H x D):  408 x 256 x 380 mm (16-1/16" x 10-1/8" x 15")

Weight:  13,5 kg (29 lb 11 oz)

Sony TC 252-D reel-to-reel

A Really Spectacular Buy
The new solid-state stereophonic Sony model 252-D is loaded with exciting quality features including sound-with-sound. Handsomely mounted in a low profile walnut wood cabinet. Here is the most tape deck recorder for the money. And it's a Sony.
Scraoe Flutter Filter
Special precision idler mechanism located between erase and record/playback heads eliminnates tape modulation distortion. This feature formerly found only on professional studio equipment.
A versatile feature that enables you to record on one channel while listening to the other . Ideal for learning or teaching foreign languages as well as perfecting diction, singing and instrumental music.
VibrationFree Motor
An important new Sony development utilizing "floating" shock absorber action to isolate completely any  motor vibration from the tape mechanism.

Four-Track Stereophonic and Monophonic Recording and Playback
Seven inch reel capacity provides hours and hours of stereo enjoyment. Stereo headphone jack for private listening. Automatic sentinel shut-off. Two VU meters. Pause control, Three-digit tape counter. Record interlock.  Separate record selector buttons. Vertical or horizontal operation
Non-Magnetizing Record Head
Head magnetization build-up , the most common cause of tape hiss - has been eliminated by an exclusive Sony circuit which prevents any transient surge of bias current to the record head.
Instant Tape Threading
Exclusive Sony Retractomatic pinch roller permits simple one-hand tape threading. An automatic tape lifter protects heads fom wear during fast forward and rewind.
Specifications 252-D
Recording System:  4-track stereophonic or monophonic
1 Rec/ Pb :  PP30-4202N
1 Erase :  EF 18-2902A
Tape Speed:  7-1/2 ips (19 cm/s) and 3-3/4 ips (9,5 cm/s)
Frequency Response
7-1/2 ips (19 cm/s) :  30 - 18,000 Hz
3-3/4 ips (9,5 cm/s) :  40 - 13,000 Hz
Signal-to-Noise Ratio:  52 dB
Bias Frequency:  85 kHz
Wow and Flutter
7-1/2 ips (19 cm/s) :  0,12%
3-3/4 ips (9,5 cm/s) :  0,15%
Recording Time (with 1,800 ft tape)
4-track Stereo :  3 h at 3-3/4 ips (9,5 cm/s)
4-track Mono :  6 h at 3-3/4 ips (9,5 cm/s)
Inputs Sensitivity/Impedance
Mic :  72 dBs (0,19 mV) / 600 Ω
Aux, Input :  22 dBs (60 mV) / 560 k Ω
Outputs Impedance
Line Out :  more than 100 k Ω
Phone :  8 Ω
Outputs Level
Line Out :  0 dBs (0,775 V) at 100 k Ω load
Semiconductors:  13 Transistors; 3 Diodes
Power Requirement:  117 V AC 60 Hz
Power Consumption:  30 W
Dimensions (W x H x D):  386 x 190 x 340 mm (15-1/4" x 7-1/2" x 3-7/16")
Weight:  8 kg (17 lb 11 oz)

Marantz ST-50L tuner

FM Stage:  87,5 - 108 MHz
Sensitivity (DIN)
Mono (s/n26 dB, 75 Ω ) :  0,7 µV
Stereo (s/n46 dB, 75 Ω ) :  20 µV
Selectivity (Adjacent Channel 98 MHz)
Wide IF :  40 dB
Narrow IF :  75 dB
Tuner Output (1 kHz, 75 kHz Deviation):  940 mV
Signal-to-Noise Ratio (DIN)
Mono (Weighted) :  86 dB
Stereo (Weighted) :  78 dB
Total Harmonic Distortion
Mono Wide IF :  0,05%
Mono Narrow IF :  0,15%
Total Harmonic Distortion
Stereo Wide IF :  0,08%
Stereo Narrow IF :  0,3%
Accuracy of Frequency Response across 30 Hz - 15 kHz Bandwidth:  +0,5 -1,5 dB
Stereo Separation
Wide IF :  55 dB
Narrow IF :  50 dB
MW Stage :  531 - 1602 kHz
Sensitivity (s/n20 dB 30% mod. 1 MHz):  350 µV
Selectivity (1 kHz, 9 kHz) :  40 dB
Signal-to-Noise Ratio (1 MHz):  54 dB
lW Stage:  152 - 282 kHz
Sensitivity (s/n20 dB 30% mod. 250 kHz):  800 µV
Signal-to-Noise Ratio (at 250 kHz):  50 dB
General  Section
Power Requirements:  220 / 240 V AC 50/60 Hz or 110 / 120 / 220 / 240 V Ac, 50/60 Hz
Dimensions (W x H x D):  420 x 86 x 334 mm
Weight:  4,5 kg

SAE 2500 / XXV power amplifier

Solid State Power Amplifier
At  the very top of our amplifier line are the Mark 2500 (XXV) Professional Power Amplifier , with 300 watts per channel, min. RMS into 8 Ω  at less than 0,05% Total Harmonic Distortion , both channels driven, 20 Hz to 20 kHz), these amplifiers represent years of sound reinforcement experience. They are offered in our traditional satin-gold and black version (Mark XXV) for home music systems, and the professional version (Mark 2500) complete with black rack-mountable front panel and custom handles. They are easily transported since they weigh less than sixty (60) pounds each.
Along with the fully complementary input circuitry designed into all SAE amplifiers, a unique Parallel-Series-Output circuit utilizes 16 output devices and combines the inherent advantages of both parallel and series connected output stages.
Unit-to-unit repeatability, ease of service, and minimal wiring are the benefits accuring from plug-in drive, input, and relay boards. A massive heat sink of 1/8" aluminum, and built-in forced-air cooling ensure cool operation under the most demanding power and load conditions.
Amplifier Protection
Four means of protection are included: Avolt/amp limiter which senses load impedances below 2 Ω  (without being affected by reactive loads such as electrostatic speakers which are rated at 4 Ω  or higher). A thermal cut-out device  for sensing  of abnormal heat-sink temperature, 4 B-supply fuses, and an AC-line fuse.
The Mark 2500 (XXV) are completely balanced from input to output utilizing full complementary double differential inputs, complementary drives and full complementary series connected output stages. Eight output devices per channel (in paralll/series) are utilized for higher than normal safe-area operation. The output devices are run so conservatively that failure is improbable.
Feedback Level Controls
This type of level control assures a constant input impedance of 50  kohm and reduces the noise figure to less than -100 dB below rated output at all positions.
The meters in the Mark 2500 (XXV) are direct power reading in Watts. They are extremely useful and easy to read requiring no conversion charts. A dB reference is provided for professional applications. In conjunction with the range switch, they cover output levels from 20 mW to over 400 Watts
Plug-in Board Design
Easily accessible input, drive , and relay boards make the amplifiers both simple to service and consistant in performance from one amplifier to another in production. All boards are constructed with military-grade, FR-10 glass-epoxy material to ensure circuit integrity.
Loudspeaker Protection
In case of subsonic pulses or ±DC outputs the amplifier incorporates a relay activated disconnect circuit, which will automatically disconnected the loudspeakers from the amplifier. Used also during turn-on prevent annoying turn-on transients, this dual relay circuit incorporates features unique to SAE products. The most important of these alleviates high frequency distortion developed by the relay due to "contact diode effect"
Power Supply
The engineering goal was to develop a transformer which was small in size yet have a greater copper-to-iron ratio resulting in better regulation. This was achieved by using thicker square-section copper windings and special laminations which  have extended window openings effecting lower heat generation and greater efficiency. This transformer which is manufactured within the SAE plant is coupled to 4 computer-grade capacitors totaling 40,000 microfarads. This combination creates a power supply which will very no more than 10% from no load to full load.
Forced Air Cooling
A quiet, high-output integral fan provides the necessary cooling for continuous operation under demanding situations or confined installations. The Mark 2500 is equipped with an extra high-speed fan.
Continuous Power Output per Channel (20 Hz -20 kHz both channels driven, 8 Ω , RMS min.):  300 Watts at 0,05% (T.H.D)
45Continuous Power Output per Channel (20 Hz -20 kHz both channels driven, 4 Ω , RMS min.):  450 Watts at 0,1% (T.H.D)
Total Harmonic Distortion (from 20 Hz to 20 kHz at 250 mW to rated power)
 at 8 Ω :  0,05% Max.
 at 4 Ω :  0,1% Max.
Intermodulation Distortion (from 250 mW to rated power at 8 Ω  with any 2 mixed frequencies between 20 Hz to 20 kHz at 4/1 voltage ratio):  0,05% Max.
Frequency response (at rated power):  20 Hz - 20,000 Hz ±0,25 dB
Noise:  greater than 100 dB below rated power
Transient Response of any Square Wave:  2,5 microseconds rise and fall time
Slew Rate:  40 Volts per microsecond
Stability:  unconditionally stable with any type of load or no load inclding full-range electrostatic loudspeakers
Damping Factor:  150 Min (100 Hz)
Input Sensitivity:  1,84 V RMS for rated output at 8 Ω
Input Impedance:  50 k Ω
Semiconductor Complement:  46 Transistors, 49 Diodes
Overload Protection  
Low impedance electronic-sensing circuit limits with output current below 2 Ω  without limiting with 4 Ω  or higher (or reactive loads)
Thermal sensing of inadequate ventilation
Internal B+, B- suppy fuses
Loudspeaker protection
Relay circuit protects loudspeakers fom low frequency oscilations and plus or minus DC output. Five second turn on/off delay eliminates on/off disturbances
Power Requirements:  110 - 125 V, 50/60 Hz 100 watts at idling to 1100  watts at rated output
Dimensions (W x H x D):  483 x 178 x 400 mm ( 19" x 7" x 15,75") excluding handles controls, and connections)
Weight (Shipping):  30,9 kg (68 pounds)
Options:  Walnut Cabinet WC-25

Optonica ST-4405 tuner

Optonica ST-4405 in an AM/FM stereo tuner ; featuring a stereo beacon, LED FM center channel tuning indicator, 5-step LED signal strength indicator, and an FM Air Check 400 Hz output tone for presetting of a recorder's level controls. One set of variable line level outputs is provided.
The front panell hasonly one control: for tuning. The output level control is lockated on the rear apron. Front panel switches are provided for power, AM, FM mono, FM Auto (mono/stereo), FM muting, hi-blend (MPX noise filter), and Air Check.
The FM antenna input is 75/300 ohms. A rod antenna and external connection are provided for Am. One unswitched AC outlet is provided.

Full limiting was attained with 4,8 µV. For 300 Ω and "Tee" antennas the monophonic high fidelity sensitivity (60 dB quieting) measured 10 µV. The stereo high fidelity sensitivity 955 dB quieting) was 70 µV.
At standard test level the stereo frequency response measured +1/-1,8 dB from 20 to 15,000 Hz. Distortion depended on the tuning adjustment beacause the "center channel indicator" illuminates over a relatively large tuning range. Monophonic distrtion ranged from 0,15%  to 0,25%  T.H.D. stereo distortion ranged from 0,15% to 0,3% T.H.D. the Signal-to-Noise ratio measured 71 dB. Stereo separation was +40 dB . Selectivity was good.
The maximum output level corresponding to 100% modulation of the transmiter was 0,8 volts.
The Air Check output level was 0,55 volts; 3,5 dB below the stereo and mono output level corresponding to 100% modulation of the transmitter. For particularly clean recordings we suggest the recorder be adjusted to indicate no higher than -4 dB (below 0-VU/0-dB) when feeding the Air Check signal
Though stations can be received 9with considerable noise) below 3,4 µV input, the LED FM center channel indicator requires at least 3,4 µV before it turns on. The 5-step signal strength indicator requires at least 5,5 µV before the first (lowest value) step illuminates.
AM tuner performance is generally average, with higher than average sensitivity to signals on the high end of the dial.

Overall dimensions measured:  16-15/16" (wide), 2-21/32" (high); 15-1/2" (deep). 
Weight is 11 lbs.

TDL RTL 3 loudspeakers

The TDL RTL 3 is the perfect partner for a larger room. Two bass units within these "Reflex Transmission Line" loudspeakers further enhance bass peformance, contributing to increased sensitivity and additional power handling. Retaining the fine stereo imagery of their smaller counterparts, room position is not critical, neither are they difficult to drive. Indeed,, they possess the ability to portray accurately the original performance at realistic sound levels, especially when coupled with powerful amplification

System:  Reflex transmission line loading floor standing
Drive Units:
Bass Unit:  2 x 172 mm loaded polypropylene cone with forward roll rubber surround and phase plug - long throw double wound coil on kapton former with bump back magnet yoke.
Tweeter :  19 mm soft dome ferro-fluid cooled
Crossover:  Electrical 2-way second order network at 3 kHz - bi-wired
Frequency Range:  35 Hz - 20 kHz
Sensitivity:  90 dB at 1 m/1W
Impedance:  8 ohm nominal
Amplifier Requirements:  20 - 120 watts per channel
dimensions (H x W x D):  900 x 200 x 375 mm
Weight:  21 kg (each packed)
Finish:  Black Ash or Rosewood

TDL RTL 2 loudspeakers

The TDL RTL 2 are floor standing reflex transmission line speakers, each having no greater a footprint than a bookshelf speaker on its stand. the bass extension possesses that sense of ease and authority that only larger loudspeakers can convey. easily matching most amplifiers, the TDL RTL 2 make an obvious choice for those serious listeners wishing to enhance their enjoyment of recorded music by acquiring a speaker capable of reproducing the full dynamic and frequency range of modern programme material
System:  reflex transmission line loading floor standing
Drive Units:
Bass Unit:  172 mm loaded polypropylene cone with forward roll rubber surround and phase plug - long throw double wound coil with bump back magnet yoke.
Tweeter :  19 mm soft dome ferro-fluid cooled
Crossover:  Electrical 2-way second order network at 3 kHz - bi-wired
Frequency Range:  40 Hz - 20 kHz
Sensitivity:  87 dB at 1 m/1W
Impedance:  8 ohm nominal
Amplifier Requirements:  20 - 80 watts per channel
dimensions (H x W x D):  730 x 200 x 220 mm
Weight:  24 kg (pair packed)
Finish:  Black Ash or Rosewood

Luxman DP-07 CD transport

The Luxman DP-07 Compact Disc Player features:
GaAlAs laser double hetero diode pick-up
Anti-resonant ceramic FRP base and massive aluminium diecast chassis
Special shock absorber for floating pickup support
High speed precision linear motor tracking
Isolation of left/right channel signal paths at all stages including power transformers
Idependent voltage regulators at 10 stages
Pickup, microcomputer/display, output stages, transformers, and power supply components isolated in separate internal blocks to eliminate electrical crosstalk
Ultra-high quality materials and components used throughout, including PC-OCC wiring and 70µ-thick OFC glass epoxy PC boards
Top-loading panel to eliminate tray vibrations and seal out atmospheric disturbances
Full remote control features
Line phase sensor
Front panel display dimmer/switch
Champagne gold finish

Works of Art. - introducing the hardware
The Fluency DAC is the heart of the Luxman DA-07 D/A Converter Unit, a masterpiece of electronic engineering and careful design in its own right. Luxman spared no effort on any aspecct of its massive anti-resonant construction, top-quality components, and capabilities, which include D/A conversion for CD, DAT, and digital satellite broadcasting and three optical and three coaxial digital inputs.
Likewise, the Luxman DP-07 CD Player sets a new standard for uncompromising quality of design, materials, and construction in pursuit of Ultimate Fidelity. Its top-loading design, a massive anti-resonant ceramic FRP base and diecast chassis, and the most elaborate damping system ever used in a CD player ensure that the GaAlAs laser pickup tracks flawlessly. As in the DA-07, unmatched purity of output signal is achieved through full separation of L/R power supplies and signal paths. In series with the DA-07, the DP-07 produces a sound of a totally different dimension from any other CD player. In sum, it is the only CD player that can claim to reproduce music as it was first played.

The Ultimate CD Player System
Luxman is so confident that the DP-07/DA-07 CD p;layer system will set a new standard for CD reproduction, it has already started to tackle the development of Fluency DAC-equipped CD players for more moderate budgets. For now, though, the choice of the ultimate CD player is a simple one. Listen and let your own ears help you decide whether you want the state of the art. Because until we can advance it any further, this is it.

Laser Pick-up:  Gallium Aluminium Arsenide (gaAlAs) Double Hetero Diode
Digital Outputs
Coaxial :  0,5 Vp-p/75 Ω
Optical 1 :  Wavelength 820 nm
Optical 2 :  Wavelength 660 nm
Remote Control Unit:  RD-07 (included)
Dimensions (W x H x D):  300 x 183 x 452 mm
Weight (Net):  20 kg

Luxman DA-07 D/A converter

The Luxman DA-07 Digital/Analog Converter Unit
Fluency DAC conversion of digital  inputs with sampling frequencies of 44,1 kHz (CD), 48 kHz (DAT) and 32 kHz (Digital Satellite Broadcasting Tuner)
Complete isolation of left/right channel and digital/analog signal paths at all stages, including independent L/R power transformers
Ultra-high quality materials and components used throughout, including PC-OCC wiring and 70 µ-thick OFC glass epoxy PC boards
Independent voltage regulators at 11 stages
Massive anti-resonant rigid construction with 18 mm front panel
Full copper plated chassis and 10-block internal layout for maximum shielding
Switching of 3 coaxial, and 3 optical digital inputs (2 standard and 1 ultra high speed for use with DP-07)
Digital recording optical and coaxial outputs
3 analog outputs (variable coaxial, fixed coaxial, and fixed balanced)
Adjustable master output level
Front panel display dimmer/switch
Champagne gold finish
A conventional DAC design applying Shannon's Theorem and a digital oversampling filter results in ringing distortions. These can be seen in the small ripples on either side of the musical signal. Ringing results in constant low-level noise and a perceived decline in dynamic range. These spurious signal also cause phase distortions during listening, detracting from the subtle musical harmonics that make music come to life. The Fluency DAC virtually eliminates ringing. A similarly dramatic improvement in reproduction is seen inn the square wave test.
Restoring the full musical spectrum
The advantages of the Fluency DAC are not limited to the elimination of phase shift and ringing. By accurately selecting musical signals at the input stage, the Fluency DAC produces an analog signal with more musical depth. Almost all music sources naturally contain a small but significant harmonic component at the upper limits of audibility. This component is critical to the soundstage localization and musical "ambience" that are essential for realistic reproduction. However, digital recording for compact discs is a pulse-code modulation process using a sampling frequency of 44,1 kHz, which effectively eliminates all musical signal from about 22 kHz on up. Moreover, conventional DAC's employ a filter that begins a steep cut-off at lower frequencies.

Luxman found an ingenious way to restore this missing musical ambience using the Fluency DAC. Because harmonics arise from basic physical laws and mathematical principles, the distribution of harmonics that occur in nature can be recreated. By carefully programming the digital input stage of the Fluency DAC, Luxman has succeeded in reproducing the rich ambience lost in the CD recording and playback.

Method of D/A Conversion:  Fluency DAC, 16-bit, no LP filter
Sampling Frequencies:  32 kHz, 44,1 kHz, 48 kHz (automatic switching)
Frequency Response (CD Input):  4 Hz - 20 kHz (±0,1 dB)
Total Harmonic Distortion:  0,008%
Impulse Distortion (Impulse peak/sample peak):  approx. 0,4% (ref. 26% for DAC based on Shannon's Theorem)
s.n Ratio:  more than 115 dB
Digital Inputs Voltage:
Coaxial 1, 2, 3 :  0,5 Vp-p/75 Ω
Optical 1 :  125 Mb/s
Optical 2, 3 :  6 Mb/s
Digital Output Voltage
Coaxial:  2 V/74 Ω (fixed), -2 V/ 100 Ω (variable)
Balanced:  4 V/ 94 Ω (fixed)
Dimensions (W x H x D):  438 x 220 x 474 mm
Weight (net):  27 kg

Pioneer TX-600 tuner

 A medium-priced stereo AM/FM solid state tuner with advanced circuitry, high sensitivity and outstanding tonal response.
In designing the new TX-600 tuner, the objective of Pioneer engineers was to create an uncompromising unit of excellence that could be offered to the music public at a very reasonable price. The performance specifications of this new Pioneer component go a long way to show how this objective was fulfilled. The TX-600 combines FET, ICs and ceramic filters to offer unusually high sensitivity and image ratio, along with improved selecitvity and capture ratio. The sound that emanates from the unit is finely balanced, solid stereo sound. And although this Pioneer tuner reflects the very finest of engineering and performance through and through, it is priced surprisingly low so that even the stereo fan operating within a limited budget may fit the TX-600 into his group of components.

Advanced Circuitry In FM Front-end
Nothing has been spared to make the TX-600 one of the finest performing tuners in its price range. Circuitry in the FM tuner  section includes an FET to raise sensitivity and imge ratio while safeguarding against cross-modulation. Additionally , the if stage is equipped with IC and ceramic filters which are necessary for improved selectivity and capture ratio. You will find that the TX-600 receives signals with rare sensitivity even in areas where these signals are usually weak. Moreover, since the MPX decoder (the circuit that separates the two channels of FM stereo programs) works on the highly accurate switching system, it provides a very wide frequency response and stability. Then there is also a discriminator amplifier included in the set that assures sharp channel separation at all times. All of these circuitry features are especially vital today in times of increasing numbers of FM stations.

Easy Tuning
FM tuning on the TX-600 is accomplished with ease, thanks to the extra-wide linear type dial scale. Even in metropolitan areas where a large number of FM stations may exist, this Pioneer tuner has the knack of separating station signals, affording you precision tuning with minimum noise and maximum stereo separation. The TX-600 is also eqipped with a large, illuminated dial and dual meters - one a signal strength meter, the other a center zero meter. When you are using AM, the signal strength meter alone is sufficient for precise tuning.

AM Tuner Section
The AM tuner section of the TX-600 is designed for optimum sound quality and reception. It benefits greatly from the ferrite-loopstick antenna, as well as the combination of double tuning and silicon transitors employed throughout for perfect reception.

FM Multipath Terminal for Ideal Reception
The greatest enemy of clear FM stereo sound is FM multipath interference, which most often occurs when the path of the signal is deflected by a mountain or high-rise building. This interference, however, can often be reduced by changing the direction of the antenna in the optimum direction. The TX-600 is equipped with an FM multipath terminal to help you discover the ideal antenna position. To do this requires that you connect the Pioneer Stereo Display. (Model SD-1000) to the FM multipath terminal on the rear panel of the TX-600.

Additional Features
The TX-600 has a number of other important features that add up to maximum sound performance. There are separate AM and FM output level controls, which can be set to compensate for differences in AM and FM signal strengths, so that the master volume control will not require readjustment-when the selector is switched. Also, there is an FM muting switch, that helps to eliminate FM inter-station noise, that irritating "rustling" between stations. Among the useful auxiliary circuits provided with the TX-600 are an extra pair of tape output jacks that permit direct tuner-to-tape recording.

FM Section
Frequency Range:  87,5 to 108 MHz
Usable Sensitivity 2,2 µV IHF
Capture Ratio:  3 dB IHF
Selectivity:  more than 45 dB IHF
Image Rejection:  more than 50 dB (98 MHz)
IF Rejection:  more than 80 dB (90 MHz)
Spurious Rejection:  more than 70 dB (98 MHz)
AM Suppression:  50 dB
Signal-to-Noise Ratio:  70 dB
Total Harmonic Distortion
Mono :  less than 0,6% (100% mod.)
Stereo :  less than 0,8% (100% mod.)
Tuning Indicator:  Signal strength type and center tuning type
Muting:  Switchable to On-Off
Stereo Separation:  more than 40 dB  (1 kHz)
Sub Carrier Suppression:  more than 35 dB
Noise Filter:  Switchable to On-Off
Output Voltage:  Controllable, from 80 mV to 2,4 V
Antenna Input:  300 Ω  (balanced), 75 Ω  (unbalanced)
Multipath Terminals:  Vertical and Horizontal
AM Tuner
Frequency Range:  525 to 1605 kHz
Usable Sensitivity:  15 µV IHF
Selectivity:  more than 22 dB IHF
Image Rejection:  more than 45 dB (1,000 kHz)
IF Rejection:  more than 35 dB
Signal-to-Noise Ratio:  more than 50 dB
Output Voltage:  Controllable from 80 mV to 2,4 V (100% mod.)
Antenna:  Built-in ferrite loopstick antenna
Audio sections
Semiconductors:  1 FET; 2 ICs; 16 Transistors; 19 Diodes
Recording Output/Impedance:  750 mV/3,6 k Ω   (FM 100% mod.)
Level Control:  AM and FM
Power Requirements:  110, 120, 130, 220, 240 V 50/60 Hz
Power Consumption:  25 watts (max.)
Dimensions (W x H x D):  430 x 145 x 345 mm (16-15/16" x 5-11/16" x 13-9/16")
Weight:  7,6 kg (17 lbs)

Sennheiser HD40 headphones

Here's more proof that no one combines extraordinary sound and extraordinary comfort quite like Sennheiser HD40 headphones, weighing in at an incredible two ounces, are the lightest-weight standard series Sennheiser Open-Aire headphones ever.  Yet, despite their unusual compactness, they continue the Sennheiser tradition of superb clarity and definition over a wide frequency range. plus rugged reliability, for years of musical enjoyment.
The Sennheiser HD40 offers an additional advantage, a new standard of value, out performing headphones many times its price. and the stranded-steel cable sets a new standard for durability.
For use with your portable walkaround you can get the same kind of superb sound and easygoing comfort with the Sennheiser HD40W.
Audition them today. You'll hear - and feel - the difference.

Frequency Response:  22 Hz to 18 kHz
Impedance:  600 Ω (may be used with 4 ohm to 600 ohm outputs)
Sensitivity Nominal :  90 dB (SPL 1 m / at 1 kHz)
Total Harmonic Distortion:  1,5% (at 94 dB SPL)
Weight:  2,0 ounces (without cable)
Cable:  10 foot stranded-steel with molded standard 1/4" stereo phone plug
Impedance:  42 Ω
Sensitivity:  94 dB at 1 mW/1 kHz
Cable:  4 foot stranded-steel with stereo phone mini plug

Sennheiser MS100 headphones

Inside-Out Headphones
Introducing Inside-Out™ MS100 hedaphones from Sennheiser.
If you thought you couldn't get the kind of lifelike musical reproduction from your portable that you get from the finest home equipment, prepare to think differently.
Most people who know audio know that Sennheiser's Open-Aire® design deliveres sound that clearly surpasses even the most expensive home loudspeakers. It's unequalled in wide linear response, in transient ability, in ultra lghtweight comfort.
Now comes the breakthrough.
For the first time you can have headphones rugged and reliable enough to bring you that same performance not only at home, but outdoors as well. All thanks to the advanced electroacoustic technology that made Sennheiser a legend among recording studio technicians, astronauts, and audiophiles alike.

An exclusive new design in headphones that are compatible both with fine home stereo equipment and portable walkarounds, complete with 6-foot "Inside" extension cable, exclusive Sennheiser Open-Air® technology is comfortable, lightweight,, yet permits total listening environment indoors or out.

Frequency Response:  20 Hz to 20 kHz
Impedance:  42 Ω
Sensitivity Nominal SPL at 1 kHz:  96 dB
Total Harmonic Distortion:  1%
Weight:  1,4 ounces
Outside 4-foot cable with standard mini stereo plug
Inside 6-foot extension cable with standard stereo phone plug
2 extra Open-Air headphone cushions