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





BSR UA 70

 The BSR UA70 record changers will play a stack of one to six records in automatic sequence and shut off after playing the last record. 16, 33-1/3, 45 and 78 RPM records can be played.

Indexing, correct tone arm set-down, for playing 12", 10" or 7" records is determinated by the position of the 12, 10, 7 control.
The tripping method is the velocity type. Rapid tone arm acceleration is required to actuate the trip mechanism.
The changer operates on 117 V AC, 60 Hz with provisions made for converting to 220 V AC operation and 50 Hz operation. The motor leads can be connected as shown in diagram, on the motor, for operation on 220 V AC.  A simple conversion kit for changing to 50 Hz operation is available.
The BSR model UA70 is equipped with a pickup cartridge and tone arm head combined in a single unit.
 Features of the BSR UA70:
Calibrated stylus pressure control for precise low pressure trecking.
Coares and fine counter balance adjustment of pick-up arm.
Corner mounting springs effectively insulate the instrument from any external vibrations.
Light-weight cartridge shell with finger lift.
Integral mechanical cueing device allows the pick-up arm to be reised or lowered at any selectet point on the record when records are played manually.
Automatic lock which secures arm to rest after record has been played.
11" diameter deep rim turntable with attractively styled mat.
Dynamically balanced four pole motor  suspended on butyl rubber mountings.
Interchangeable centre spindles for manual or automatic play.
Automatic disengagement of idler wheel when the unit is shut off.
Simple to operate linear controls.

Dynaudio Confidence 3


As great truths are wont to do, the Confidence 3 is discrete about its qualities. We all know of much, much bigger loudspeakers 49.5 x 22.5 x 33.5 cm won't even impress a dwarf in very flat shoes - one of the reasons why the Confidence 3 has its personal dedicated stand). Or speakers with even more wallop (die-hard heavy metal fans will probably put on an aloof smile - at least until you turn the volume knob a little clockwise).But if true musical worth is what you're after, the Confidence 3 is in a class of its own. The tweeter is a special version of our justly famous Esotar T-330 D, which combines absolute brilliance with ultimate musicality - without the least bit of hardness. (You probably knew how it looks without realising it: the most reputed speakers in the world tend to be designed around this tweeter, a laudable step in the right direction.) With its ferrofluid-damped resonance and an aluminium voice coil which is lighter than a feather, it is not only at the outer frontier of the technologically feasible. It also puts an end to all diffuseness and tonal colouration.

Not in the least because the backwards-radiated energy of the Esotar (a democratic 50%), thanks to damping measures calculated by our famously reliable Danish engineers on high speed computers, is almost completely absorbed.

Which makes the Confidence 3 one of the few speakers that do not distract you with their own echo.
Technical Specification Confidence 3
Drivers:
Tweeter:  ESOTAR, 28 mm state-of-the-art. soft dome tweeter. Pure aluminium wire voice coil.
Woofer:  Powerful 20 cm with 75 mm pure aluminium wire voice coil. Neodymium magnet system. Die cast basket.
Features:
High quality polypropylene capacitors.
Only high quality air coils are used.
Special multi core air coils.
Sandwich enclosure.
Dedicated stand with spikes.
Sensitivity (2.83 V/1 m):  86 dB
Recommended Amp. Power:
Medium size rooms:  >65 watts
Large size rooms:  >125 watts
IEC Long Term Power Handling:  200 watts
Impedance, Nominal:  4 ohms
Impedance, (20 - 200 Hz):  4.4 - 10.7 ohms
Impedance, (200 - 20 kHz):  4.7 - 6.3 ohms
Impedance, Phase Shift (20 - 200 Hz):  -28.8° - +20.4°
Impedance, Phase Shift (200 - 20 kHz):  -3.8° - +8.3°
Impedance, HF (200 kHz):  5.3 ohms
Frequency Response (± 3 dB):  38 Hz - 28 kHz
Resonance Frequency:  35 Hz
Crossover:  2 way. Crossover is impedance corrected
Crossover Frequencies:  2600 Hz
Crossover Slope: 
Woofer: 6 dB/oct,
Tweeter: 6 dB/oct
Connection:  OCOS + WTB gold binding posts
Recommended Placing:  On the included stand
Internal Cabinet Volume:  19 litres
Bass Principle:  Bass reflex
Dimensions (W x H x L):  226 x 492.5 x 336 mm
Weight:  17 kg

Dynaudio Confidence 5

 

Technical Specification Confidence 5

Tweeter:  ESOTAR, 28 mm state-of-the-art. soft dome tweeter. Pure aluminium wire voice coil.
Midrange:  ESOTAR, 52 mm state-of-the-art. soft dome midrange. Pure aluminium wire voice coil.
Woofer:  20 cm with 100 mm pure aluminium wire voice.
Internal:  Compact 17 cm with 75 mm pure aluminium wire voice coil.
The crossover is impedance corrected both at the units as well as at the input. Internally wired with OCOS cable. High quality polypropylene capacitors. Only high quality air coils are used.
Special multi core air coils. Sandwich enclosure. Spikes included.
Sensitivity (2.83 V/1 m):  83 dB
Recommended Amp. Power:
Medium size rooms:  >120 watts
Large size rooms:  >240 watts
IEC Long Term Power Handling:  250 watts
Impedance, Nominal:  4 ohms
Impedance, (20 - 200 Hz):  4.6 - 9.2 ohms
Impedance, (200 - 20 kHz):  5.0 - 7.7 ohms
Impedance, Phase Shift (20 - 200 Hz):  -19.6° - +18.7°
Impedance, Phase Shift (200 - 20 kHz):  -5.1° - +15.1°
Impedance, HF (200 kHz):  5.4 ohms
Frequency Response (±3 dB):  47 Hz - 21 kHz
Resonance Frequency:  43 Hz
Crossover: 3  way
Crossover Frequencies:  1080 Hz + 4000 Hz
Crossover Slope: 
Woofer: 6 dB/oct,
Midrange: 6 dB/oct,
Tweeter: 6 dB/oct
Connection:  OCOS + WTB gold binding posts
Recommended Placing:  Floor, free standing
Internal Cabinet Volume: 2 0 + 22 litres
Bass Principle: Compound
Dimensions (W x H x L):  207 x 1195 x 375 mm
Weight:  41 kg

Meridian 207 Pro

 No ordinary Compact Disc Player
Meridian have earned their reputation as the leading designers of the world's finest sounding Campact Disc players. The 207-Pro is designed and made by these enthusiasts in England, and extensive research has been made in the evolution of this very advanced CD player. Every detail of the mechanical and electric engineering, from the floating cast subchassis to the electronic volume and comprehensive remote controls, is designed to make the 207-pro the finest Compact Dsic player. The Meridian 207-Pro est quality music playing system for your home - and it combines this formidable performance with effortless, yet comprehensive control of its functions. It has no equal.
A powerful feature of the Meridian 207-pro is the built-in preamplifier facilities. It can connect a tuner and tape directly to Meridian active loudspeakers, to give a simple system with the finest combination of performance and control available; or it may be used in a conventional music system.
This leaflet highlights some of the design features of the Meridian 207-pro, but only a visit to a Meridian dealer will convey a true impression of its distinctive quality.
 Meridian 207-Pro, why separate boxes?
It is no accident that the 207-Pro is arranged in two parts. One contains the precision-engineered motrised CD transport system and the system power supplies. The CD transport carries the single-beam laser pick-up assembly in a sprung die-cast subchassis, and runs on precision stainless steel guides. The assembly moves out at the touch of a switch on the front panel. This whole mechanism is housed in a heavy aluminium tube and when the plate-glass door slides shut against its soft surround, the spinning Compact Disc is acoustically and mechanically isolated. This aspect of the construction adds a lot to the sound quality of the player and yields the convenience of front-loading without the loss of quality that normally results. The digital signal is passed via a single cable to the electronics unit.
 The 207 provides a unique conbination of quality and facility. The very highest standards of audio performance are combined witha truly comprehensive control system, resulting in a product which has received worldwide acclaim. Meridian now provide a complementary range of products to the 207 including 201 Preamplifier,, 205 Power Amplifier, 204 Tuner Timer, 209 remote Control and a range of 3 Active Loudspeaker Systems.
The 207 has the following new features:
New Meridian designed servo circuits for improved playability.
2 box construction which provides acoustic and electronic isolation of circuits.
High mass 3 point sorbothane suspension system for better sound.
New Meridian designed microprocessor control functions for simpler operation.
Inputs for radio, tape and LP record deck with switchable cartridge level matching
High energy power supplies for better control of audio circuits resulting in improved sound.
Full function remote control system.
Specifications
Inputs Compact Disc:
Radio :  500 mV/10 k Ω
Tape:  500 mV/10 k Ω
Outputs
Fixed :  2V RMS / 12 Ω
Variable :  4 V RMS / 47 Ω
Tape :  500 mV / 47 k Ω
Distortion:  less than 0,004%
Noise:  better than -90 dB
Conversion:  4 x oversampling at 14 bits
Precision:  15,5 bits min
Displays:  Track/disc/total/remaining time/selecte track/track playing/error correction
Dimensions (W x H x D):  160 x 90 x 310 mm ( 6,3" x 3,6" x 12,2")
Weight:  8,5 kg
Finish:  Black textured enamel and glass

Sansui LM-220


The LM Series - Exclusive-design Linear Motion tweeter driver, giving much improved transient response, and the innovative muti-radiation baffle - to create more accurate sound image resolution - makes the speaker systems really astounding performers. Reletively small in size, they deliver room-filling natural sound, greater stereo perspective to re-create the full musical presence in your home.
For full high fidelity music reproduction, your speaker system must be good; no matter how broad the frequency range reproduced by your power amplifier, no matter how low its distortion, you'll never get more than your where you listen to music.
Our engineers have been working for many years to design speakers which perform well even in the acoustics (often poor) of normal living rooms. They've developed a range of speakers matched to varying output levels in driver power, for optimium quality sound, full and natural, under differing conditions.
Sansui engineers aim beyond the mechanical test results from instrumentation readings. They know there are clear-cut subjective differences; the ultimate test of any speaker system is listening. They combine sophisticated engineering skills with the sensitive requirements of listening to music, to produce this Sansui series. These incorporate advanced state-of-the-art. Electronics, and realistic listening criteria in their design.

Sansui offers the innovative LM (Linear Motion) speaker systems, large, complex systems - combining massive woofers with several mid-range and tweeters - and full fidelity acoustic suspension systems, for full concert-hall and realism in any size space.
You'll find Sansui speaker systems - delivering rich, realistic sound - to satisfy exactly your needs; power capacity, appearance, sound quality in your music-listening environment and price. There's no reason to settle for less than Sansui.

SPECIFICATIONS LM-220
Speakers:
Woofer: 205 mm (8-1/16") Cone Type
Tweeter: 65 mm (2-8/16") Cone Type
Power Rating:  45 watts (peak)
Impedance:  8 ohms
Sensitivity:  91 dB/W (New JIS at 1 m)
Frequency Range:  32 to 20,000 Hz
Crossover Network:  2-way 12 dB/oct L-C Parallel Type
Crossover Frequency:  2,000 Hz
Finish:  Simulated wood grain
Dimensions (W x H x D):  278 x 620 x 150 mm (11" x 24-7/16" x 9-7/8")
Weight:  12 kg (26,5 lbs) net, 13,6 kg (30 lbs) packed


Sansui AU-X301


Sansui AU-X301 Integrated Amplifier
Built to drive low-impedance loads
Today's speaker system present lower impedances to the amplifier than ever before; nominal impedances of 6 or less are becoming more and more common.  And when playing music with wide dynamic  undulations, the actual impedance may go still lower, taxing the amplifier heavily. this is especially true with digital programs because of their wide dynamic range and fast transient response.
That's why an amplifier should have the capability to supply as much current to the power transistors as demanded, and at an instant's notice. Otherwise, gross distortion can result, making it impossible for you to enjoy the full benefits of digital sound. The AU-X301 is expressly designed to drive low-impedances; its dynamic power ratings tell the story - 110 watts at 8 ohms; 190 watts at 4 ohms, and 260 watts at 2 ohms.
High-power output transistors and high-capacity power supply.

Supporting the admirable low-impedance driving capability of the AU-X301 are two factors; high-power output transistors, and a well-regulated power supply that combines a high-capacity power transformer and two large electrolytic capacitors.
High-quality phono equalizer for MM and MC cartridges.
The AU-X301 accepts an input from any cartridge of any impedance. With MC cartridges, you can choose the impedance that your cartridge requires. No sonic degradation results from impedance mismatching.
Independent record selector with Off position
Subsonic filter
Loudness switch
Connections for two pairs of speaker systems (A, B, Off)
Specifications:
Power Output:  65 watts per channel (min. RMS, both channels driven into 8 Ω from 20 to 20,000 Hz, with no more than 0,05% THD)
Dynamic Power: 
260 watts + 260 watts at 2 ohms;
190 watts + 190 watts at 4 ohms;
110 watts + 110 watts at 8 ohms
Total Harmonic Distortion:  0,05%
Damping Factor (at 8 Ω):  80
Frequency Response:  1 Hz - 150 kHz +0dB -3dB
Signal-to-Noise Ratio:
Phono (MM):  80 dB
Phono (MC):  65 dB 
CD:  105 dB
Input Sensitivity/Impedance
Phono (MM):  3,5 mV/47 k Ω
Phono (MC):  420 µV /22 Ω,100 Ω
CD,Tuner, Tape:  200 mV/47 k Ω
Tone Control
Treble :  ±8 dB at 10 kHz
Bass :  ±8 dB at 50 Hz
Subsonic Filter:  16 Hz (-3 dB with 6 dB/oct)
Loudness:  +8 dB at 50 Hz, +4 dB at 10 kHz
Power:  110 - 120, 220 - 240 V; 50/60 Hz
Dimensions (W x H x D) :  448 x 136 x 311 mm (17-11/16" x 5-3/8" x 12-1/4")
Weight:  9,5 kg (20,9 lbs)


Luxman L-81


Solid State Intergrated Amplifier
A tremendous amount of time and energy was spent to achieve excellent tonal quality through unique and innovative circuit design. That combined with sophisicated styling makes these units beautiful to the ear and eye.

The power amplifier section is a whole-stage direct-coupled OCL system and the output stage is pure complementary. The differential amplifier circuit is composed of 2 stages to ensure DC stability throughout the entire power amplifier section.
Selected transistors are used especially at the 1st differential stage which have high treble cut-off frequency and large collector output capacity. At the same time, the pre-driver stage is driven by constant current so that crossover distortion triggered by class "B" operation of the output stage is suppressed. This is a technical feature common to all current Luc amplifiers as crossover distortion could impair sound quality and should be minimized.

An important feature of the pre-amplifier section is the equalizer circuit wherein the same basic circuit as the C-1000 control center is used. The operation amplifier is composed of a special IC which inherently has high loop gain and the closest frequency to that of the RIAA equalizer,, which ensures unconditional stability and overall improvement of various characteristics such as distortion, etc, throughout the entire bandwidth with sufficient amount of negative feedback.

The buffer amplifiers incorporate an orthodox 2-stage direct-coupled circuit and also LUX's well known NF (Negative Feedback) type potentiometers for the tone controls. The turn-over (roll-off) frequency for tone control is interchangeable in 2 steps with a useful "defeat" position.
We know the true measurements of minimum performance standards of a quality amplifier must be of a very high level. However, these figures are not the only requirements.

Despite every effort to make amplifier design a pure science one amplifier among many with similar absolute specification can still have, relatively, far better sound quality.
The reson there are more comprehensive theories of amplifier design which account for such problems as harmonic intermodulation, and notch distortion, stbility, filters, and equalization as they relate to statements of power.
Whatever the scientific theory, Lux conducts the most detailed listening test with engineers and musicians in different fields from what is considered good in article.

The Lux sound is not only a science but an art.
Specifications
Power Output :  45 watts minimum continuous per channel (into 8 Ω, both channel driven, 20 - 20,000 Hz , at no more than 0,1% T.H.D.))
 Total Harmonic Distortion:  no more than 0,05%
I.M. Distortion:  no more than 0,1%  (8 Ω loads, 45 W/ch 60 Hz : 7 kHz = 4 : 1)
Frequency Response:  5 - 50,000 Hz (-1 dB)
Input Sensitivity:
Phono 1 and 2 :  2,6 mV
Tuner, Aux 1, 2 :  120 mV
Input Impedance:
Phono 1 and 2 :  65 k Ω
Tuner, Aux 1, 2 :  50 k Ω
Monitor 1 and 2 :  50 k Ω
Signal-to-Noise Ratio:
Phono 1 and 2 :  better than 65 dB
Tuner, Aux1, 2 :  better than 80 dB
Monitor 1 and 2 :  better than 80 k Ω
Residual Hum and Noise:  no more than 1,2 mV
Crosstalk:
Phono 1 and 2 :  -60 k Ω
Tuner, Aux 1, 2 :  -65 k Ω
Monitor 1 and 2 :  -65 k Ω
Tone Control:  Lux NF type with turnover frequency selector
Treble  :  3 kHz, 6 kHz  defeat
Bass  :  150 Hz, 300 Hz defeat
Filters: 
Low Cut (Subsonic) :  20 Hz
High Cut :  70 Hz at 7 kHz, 12 kHz
Damping Factor:  40 dB (8 Ω)
Power Supply:  110-120, 220-140 V 50/60 Hz
Power Consumption:  200 W (8 Ω, max output, both channel driven);  150 W (CSA, UL rated)
Dimensions (W x H x D):  450 x 160 x 300 mm (17-23/32" x 6-5/16" x 11-13/16")
Weight:  10,1 kg (22,2 lbs) net

Luxman R-1030

 Model R-1030 Am/FM  Stereo Receiver
A new receiver from Lux with optimum cost/performance ratio. An exhaustive review of current circuitry and functions in receivers has made it possible to achieve greater simplicity whilsst still retaining the features indispensable to real High Fidelity. Power output 30W/channel into 8 ohms both channels driven with 0,05% total harmonic distortion.

Pre-Amp Section
Sound playback is possible from any of the FM, MW, Phono and Auxiliary terminals. A 2-stage direct coupled amp in the equalizer circuitry with PNP and NPN transistors gives good linearity and high input voltage at phono. Versatile contouring of the reproduced sound is possible with Lux's exclusive NF type tone control for bass and treble. High- and low-cut filters are useful to renmove tape-hiss disc noise and turntable rumble. A loudness control offers effective tonal compensation at low-level listening.

Main Amp Section
The direct coupled DC output configuration ensures the best possible bass and transient response and gives the amplifier excellent characteristics throughout. Today's almost mandatory full complementary symmetric output attains the least possible distortion, i.e.0,05% up to 30 W both channels driven into 8 ohms.

 FM Section
The front-end features a high grade 3-gang tuning capacitor to provide a satisfactory sensitivity at 2 µV, and 2 pairs of linear phase ceramic filter ensures good bandpass response. The superb figures provided by the PLL MPX IC in respect of distortion, separation and Signal-to-Noise will remain constant over a long period of time.
AM Section
A newly developed IC for AM reception makes it possible to obtain high sensitivity, low distortion and strong AGC, and the adoption of a ceramic filter of good selectivity ensures clean AM broad casting without interference, thus most AM stations become far more "listenable".
Specifications
Audio Section
RMS Output Power:  30 watts/30 watts (both channel driven  into 8 Ω, 20-20,000 Hz, with no more than 0,05% THD)
Total Harmonic Distortion: no more than 0,05% (8 Ω, 30 W)
Rated I.M.:  no more than 0,1% (8 Ω, both channel driven, 60 Hz : 7 kHz = 4 :1)
Frequency Response:  10 Hz - 40 kHz (-1 dB)
Input Sensitivity: 
Phono :  2,5 mV
Aux, Monitor :  150 mV
Phono Overload Voltage: 
No less than 100 mV (RMS, 1 kHz)
No less yhan 280 mV (p-p, 1 kHz)
Signal-to-Noise ratio:
Phono :  better than 66 dB
Aux, Monitor :  better than 86 dB
Residual Noise:  no more than 0,7 mV
Damping Factor:  40 (8 Ω)
Tone Control:
Bass :  ±10 dB at 100 Hz
Treble :  ±10 dB at 10 kHz
Filters:
High Cut :  7 kHz (6 dB/oct.)
Low Cut :  70 Hz (6 dB/oct.)
Crosstalk at 1 kHz:  -60 dB (Aux, Monitor)
FM Section (IEEE/IHF Standard)
Usable Sensitivity [Mono/Strereo]:  11,2 dBf (2 µV) / 19 dBf (4,8 µV)
46 dB Quieting Sensitivity [Mono/Strereo] 50 µS:  18,2 dBf (4,5 µV) / 41 dBf (60 µV)
50 dB Quieting Sensitivity [Mono/Strereo] 75 µS:  18,2 dBf (4,5 µV) / 39,8 dBf (51 µV)
Signal-to-Noise Ration at 65 dBf[Mono/Strereo]:  72 dB / 68 dB
Muting Threshold [Mono/Strereo]:  12,2 dBf (2,3 µV) / 12,2 dBf (2,3 µV)
Frequency Response 30 Hz to 15 kHz:  +0,5 dB; -1,5 dB
Distortion at 65 dBf [Mono/Strereo]:
100 Hz :  0,2% / 0,3%
1 kHz :  0,2% / 0,3%
6 kHz :  0.3% / 0,5%
Intermodulation Distortion [Mono/Strereo]:  0,2% / 0,3%
Capture Ratio at 65 dBf [mono]:  1,5 dB
Alternate Channel Selectivity [mono]:  45 dB
Spurious Response Ratio [mono]:  70 dB
Image Response Ratio [mono]:  55 dB
IF Response Ratio[mono]:  70 dB
AM Suppression Ratio [mono]:  50 dB
Stereo Separation:
100 Hz :  45 dB
1 kHz :  45 dB
10 kHz :  40 dB
Subcarrier Product Ratio [stereo]:  60 dB
SCA Rejection Ratio [stsreo]:  60 dB
AM Section
Usable Sensitivity at 1 MHz, 400 Hz, 30% mod.:  15 µV (ext. Ant.)
Signal-to-Noise Ratio at 1 MHz, 10 mV, 400 Hz, 30% mod.:  45 dB
Image response Ratio at 1 MHz:  45 dB
IF Response Ratio at 1 MHz:  40 dB
General
Power Consumption:  150 W (at full Power, 8 Ω) 150 V 2,5 A (CSA rated)
Dimensions (W x H x D):  500 x 165 x 315 mm (19-11/16" x 6-1/2" x 12-13/22")
Weight (net):  9,4 kg (20,7 lbs)

Pioneer SX-434

Stereo Receiver with high-performance tuner and direct-coupled OCL power amplifier.
There is a wide range of Pioneer stereo receivers to satisfy the needs and demands of virtually every audio fan. One of the latest, the SX-434, is specifically designed for those who insist on low distortion but who feel that paying for power they don't need is wasteful. The SX-434 has more than enough power, yet is priced to appeal to budget-conscious music lovers. Its FM section provides an excellent 1,9 µV sensitivity (IHF), a capture ratio of 1,0 dB (IHF) selectivity of 60 dB (IHF), and superb stereo separation of more than 30 dB over a 50 to 10,000 Hz range. Advanced electronic circuitry throughout includes a low-noise FET and a frequency-linear 3-gang variable capacitor in the FM front end, exclusive IC and phase-linear ceramic filters in the FM IF section and more. The phono equalizer in the SX-434 is high-fidelity all the way, with RIAA equalization of less than ±1 dB deviation. The power amplifier circuitry is the pure complementary direct-coupled OCL type with wide response and power bandwidth. The SX-434 produces 15 W + 15 W continuous RMS power (both channels driven at 8 Ω) with harmonic distrotion of less than 0,8% over 40 to 20,000 Hz bandwidth. This is enough to drive two pairs of stereo speaker systems individually or simultaneously.
High -Performance FM Front End
The Pioneer SX-434 features top-class FM capabilities. The low-noise FET and frequency linear 3-gang variable capacitor in the FM front end contribute to the excellent sensitivity of 1,9 µV (IHF). Improved image and spurious rejection characteristics and a high signal-t-noise ratio in performance.
FM IF Section with IC and Ceramic Filters
State-of -the -art. Techniques are also employed in the FM IF amplifier of the SX-434. phase-linear caermic filters and an advanced IC afford a high selectivity of 60 dB (IHF) and a capture ratio of 1,0 dB (IHF), figures you'd expect from a tuner or receiver in a higher price category.
FM Muting Switch
Annoying inter-station noise can be cancelled during tuning by the handy FM muting switch.
Exclusive IC-Equipped AM Section
Maximum fidelity and noise-free listening can be enjoyed in the AM band with the IC-equipped AM section of exclusive Pioneer design.
RMS Continuous Power 15 x 2
The pure-complementary direct-coupled OCL design of the power amplifier section in the SX-434 assures wide frequency response wide power bandwidth and satisfactorily low distrotion. Continuous RMS power over the 40 to 20,000 Hz frequency bandwidth (measured with both channel driven into 8 ohms loads) is a stable 15 W + 15 W with less than 0,8% harmonic distortion.
Two-pair Stereo Speaker Facilities
With its ample power provisions, the SX-434 drives up to two independent pairs of stereo speaker systems, one pair at atime or both together. Ideal for powering those remote speaker.
Precise RIAA Equalization
The two-stage direct-coupled NF (Negative Feedback) design of the phono equalizer in the SX-434 enables audio reproduction of records within ±1 dB deviation from the RIAA characteristic curve.
Click-Stop Tone Controls
The bass and Treble tone controls are the click-stop type for convenience in adjustment.
Other Features
The control capabilities of the SX-434 are ideal for the average hi-fi set-up; it handles a turntable, tape deck, microphone, Aux and has an output jack for stereo headphone. The provided loudness contour switch enhances frequency response at low-volume levels.

Specifications
Amplifier Section
Continuous Power Output
20 Hz to 20,000 Hz (both channel driven) :  12 watts + 12 watts at 8 Ω
40 Hz to 20,000 Hz (both channel drivem) : 15 watts +15 watts  at 8 Ω and 4 Ω
1 kHz (both channel drivem) : 16 watts +16 watts  at 8 Ω;  18 watts +18 watts  at 4 Ω
Harmonic Distortion: 
Continuous  power output :  less than 0,8%
1 W +1 W, power output:  less than 0,1%
Intermodulation Distortion:
Continuous  power output :  less than 0,8%
1 W +1 W, power output:  less than 0,1%
Power Bandwidth (IHF, both channel driven) :  10 Hz to 70,000 Hz (T.H.D. 0,8%)
Output
Speaker:  A, B, A + B (4 to 16 ohms)
Headphone :  4 to 16 ohms
Damping Factor:  more than 25 (1 kHz, 8 0hm)
Residual Hum and Noise:  less than 0,5 mV (8 Ω, pre & power amplifier)
Input Sensitivity/Impedance:
Phono :  2,5 mV/50 k Ω
Phono Overload Level (RMS/P-P) :  100 mV/280 mV
MIC :  10 mV/90 k Ω
AUX :  150 mV/80 k Ω
Tape PB :  150 mV/80 k Ω
Tape PB (DIN connector):  150 mV/80 k Ω
Output Level/Impedance:
Tape REC :  150 mV
Tape REC (DIN connector) :  30 mV/80 k Ω
Frequency Response
Phono (RIAA equalization) :  30 Hz to 15 kHz ±1 dB
Aux, Tape PB :  30 Hz to 25 kHz ±1 dB
Tone Control:
Bass :  +9 dB -8 dB at 100 Hz
Treble :  +5 dB -7 dB at 10 kHz
Loudness Contour :  +10 dB at 100 Hz ; +6 dB at 10 kHz
Hum and Noise (IHF, Short-Circuited A Network):
Phono :  more than 70 dB
MIC :  more than 65 dB
Tuner, AUX, Tape PB :  more than 90 dB
Fm Tuner Section
Usable Sensitivity (IHF):  1,9 µV
Capture Ratio (IHF): 1,0 dB
Selectivity (IHF):  60 dB
Signal-to-Noise Ratio:  70 dB
Image rejection:  60 dB (98 MHz)
IF Rejection:  90 dB (98 MHz)
Spurious Rejection:  75 dB
Am Suppression:  50 dB
Total Harmonic Distortion
Mono :  less than 0,2 %
Stereo :  less than 0,4 %
Frequency Response
20 Hz to 15 kHz, +0,2 dB, -2,0 dB
50 Hz to 10 kHz +0,2 dB, -0,5 dB
Stereo Separation:
More than 40 dB at 1 kHz
More than 30 dB from 50 Hz to 10 kHz
Sub Carrier Suppression:  40 dB
Antenna Input:   300 Ω balanced and 75 Ω unbalanced
Muting:  On-Off
AM Tuner Section
Sensitivty:  300 µV/m (IHF, ferrite antenna); 15 µV (IHF, ext. Antenna)
Selectivity:  35 dB
Signal-to-Noise Ratio:  50 dB
Image Rejection:  40 dB
IF Rejection:  50 dB
Semiconductors:  27 Transistors; 1 FET; 3 Ics; 13 Diodes
Miscellaneous
Power:
Requirements:  110/ 120/ 130/ 220/ 240 V 50/60 Hz
Consumption:  75 watts / 110 watts
Dimensions (W x H x D):  430 x 140 x 347 mm (16-15/16' x 5-1/2' x 13-21/32")
Weight (net):   8,1 kg (17 lb 14 oz)

Pioneer CT-F2121


Like the name Pioneer itself, their CT-F (Front-access) decks have come to stand for the maximum in high fidelity performance, conveniance and reliability for audiophiles the world over. Now for the first time in this popular price range, they are offering a CT-F Series stereo cassette deck with excellent performance of our top-of-the-line models CT-F9191 or -F7171 and so on : built-in Dolby-B noise reduction and a special Dolby-compatible circuit format to match ; built-in MPX filter for ideal recording of FM stereo broadcasts; independent Bias and EQ switches for maximum frequency response and lowest distortion from virtually any kind of tape; long-life permalloy-solid rec/playback head for dependable and clean musical performance; a fully automatic stop mechanism which functions faultlessly in all modes, plus dirct-change operation levers, large level meters annd more.
And just to remind you again of the advantages of our front-load, front-control design, remember that it lets you "stack or rack" the CT-F2121 over, under or between other components in your system to save space and simplify actual use. Pioneer performance, convenience and reliability - qualities that are easy to imitate but dificult to match, especially at such an attractive price.

The CT-F 2121 extraordinary cassette deck with Dolby .
Unitil now, only higher priced cassette deck and reel and reel decks provided enough recording capability and features to match a sophisticated high fidelity system, but Pioneer's engineers, in two-year project, have designed the no-compromise CT-F 2121 deck to outperform anything in its under 200 dollar price class. We are truly pround of its accomplishments.
Its front-loading , front-control operation makes it fit easily into your system, under, above or next to your other components. As for features, the CT-F 2121 is loaded. Here are some of them:
[1] It has built-in Dolby B noise reduction circuitry. Recording signal-to-noise ratio is improved as much 10 dB with standard low-noise tapes - even more with the new CrO₂ formulations.
[2] There are separated bias and equalization switches to bring out the Ct-F 2121's fullest recording capabilities no matter what kind of cassette tape you use. And a chart is included to show you the right settings for most popular brands of tape.
[3] Operation is esy and unusually flexible. The Ct-F 2121's six-lever-type controls provide fast jam-proof operation. You can even change from one mode to another without going through the Stop position.
[4] the easy-to-see front panel cassette loading compartment is illuminated for instant inside viewing. Inserting or withdrawing a cassette is as easy as snapping your fingers.
[5] A long lasting permalloy-solid record/playback head gives you clean, wide-range sound. Sound of a quality never before possible in an under two hundred dollar cassette deck.

And an automatic stop mechanism that functions in any mode to protect both the deck and your tapes, two large, illuminated VU meters and pioneer's traditionally handsome design, and you can easily see how the CF-F 2121's incredible combination of performance and features is comparable with cassette decks costing much more. Pioneer's new  CT-F 2121 gives new meaning to the word "value" in cassette decks.
Specifications
Type:  Compact cassette tape deck 2-channel stereo/mono
Recording:  AC bias system
Ersing: AC push-pull system
Heads:  Permalloy Solid recording/playback
Other: 1 x head; 1 x Ferrirte erasing head
Motor:  Electronically controlled DC motor
Fast Winding Time:  aprox. 80 sec/C-60 tape
Wow and Flutter:  no more than 0,12% (WRMS)
Frequency Response:
Standard, LH Tapes :  30 to 13,000 Hz (40 to 11,000 Hz ±3 dB)
Chromium Dioxide Tape :  30 to 16,000 Hz (40 to 12,000 Hz ±3 dB)
Signal-to-Noise Ratio: 
Dolby Off :  48 dB (standard and LH tapes)
Dolby On :  58 dB (over 5 kHz , standard and LH taoes)
When chromium dioxide tape is used. Signal-to-Noise ratio is further improved by 4,5 dB over 5 kHz
Inputs Sensitivity/Max. allowable Input/Impedance::
Mic (6 mm jack) : 0,3 mV/63 mV/ 20 k Ω (reference Mic impedance: 600 Ω to 20 k Ω)
Line : 63 mV/12V/50 k Ω, Pin jack
Rec/Play :  10 mV/2V/10 k Ω; 5P jack (DIN standard)
Outputs Reference Level/Load Impedance:
Line :  450 mV/50 k Ω , Pin Jacks
Headphone (6 mm stereo jack) :  80 mV/8 Ω
Rec/Play :  450 mV/50 k Ω; 5P jack (DIN standard)
Semiconductors:
Amplifier Section:  41 Transistors (including 2 FETs); 28 Diodes (including 3 Zenner Diodes, 1 LEDs)
Motor Control Section:  2 Transistors; 1 diode
1. Dolby system (ON-OFF) with indicatorlamp
2. Tape selector (STD/CrO₂) independently switchable bias and equalizer
3.Full-auto stop mechanism (in all modes of Play/Rec/FF/Rew)
4.Cassette compartment illumination
Power Requirements:  110/120/220/240 V 50/60 Hz
Power Consumption:  13-15 watts
Dimensions (W x H x D):  350 x 142 x 282 mm (13-3/4" x 5-5/8" x 11-1/8")
Weight:  6,6 kg (14 lb 9 oz)