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

Martin Logan Aerius i

 Twenty years ago (from the past 1996) Martin Logan presents "Aerius i" one of the ESL series, a wonder in dimension, technology and price. The Aerius i requires only 1 square foot of floor space making it an outstanding addition for small apartments and dedicated home theaters. Available in matte black with a variety of handfinished hardwood trim. Single and bi-wire capable.
 At the heart of every Martin Logan speaker -  the patented curvilinear electrostatic transducer -lies an ultrathin transparent diaphragm. Driven by charged electrons and weighing less than the air it moves, the diaphragm is so responsive it reproduces sound at levels only associated with the finest audio electronics.
With indistinguishably low distortion, the patented Martin Logan diaphragm precisely tracks the input signal, engages the air, and transmits the audio signal to your ear - flawlessly. The ESL’s low distortion and curvilinear line source combine to provide minimal room interaction, detail, power, and clarity; unavailable any other way.
Frequency Response:  40 - 22,000 Hz, ±3 dB
Horizontal:  30 degrees
Vertical:  3.5’ (106 cm) line source
Sensitivity:  89 dB [2.83 volts/meter]
Impedance:  4 Ω , 1.7 at 20 kHz
Crossover Frequency:  450 Hz
Components:  Custom-wound audio transformer, polypropylene capacitors, air core coils
Woofer Type:  8" (203 mm) high excursion, high rigidity cone with extended throw driver assembly; non-resonant chamber format
Power Handling:  200 watts/channel
Dimensions (H x W x D):  1410 x 270 x 320 mm (55,5" x 10,5" x 12,5")
Weight:   24.9 kg each, (55 lbs)

Onkyo TA-2050

The Onkyo TA-2050 is the most exciting stereo cassette tape deck in its price range. Nothing elde provides the brilliant purity of its sound, or gives you so much control over the quality of your recording and playback.
The Onkyo TA-2050 provides all the features you'd want in a precision tape deck … and more.
Onkyo's exclusive Accu-Bias system lets you "fine tune" your recording bias to customize sound. Peak reading meters (with decay) let you set more precise recording levels. Fade out/fade in controls, record/mute controls, and soft-touch switches with IC-logic / Memory-stopand memory-play.
Two motor direct drive precision and full metal tape compatibility, large illuminated "peak-hold" meters for greater precision, … are just a few of the other important features the TA-2050 offers.

The Onkyo TA-2050 is an outstanding example , it goes further than other tape decks, to harness the full performance potential of new metal tapes. One reason is Onkyo's exclusive "Accu Bias" control system, which guides you to far more precise tape bias adjustments. Brighter cleaner high notes are the reward.
The Onkyo TA-2050 also utilizes a full logic direct drive motor transport for extremely high reliability with minimum wao and flutter. A second motor handles fast forward and rewind functions. A special Hard-Permaloy record/playback head, and ferrite erase head, provide optimum performance  with all types of tape, both metal and conventional.
Styling is superb. Brushed silver metal with elegant appointments, in a dramatically handsome new slim-line design.

Track System: 4-track, 2-channel stereo
Motor:  PLL DC motor (capstan);  DC motor
Heads:  Special hard permalloy heads
Recording System:  AC bias
Erasing System:  AC erese
Tape Speed:  4,8 cm/sec.
Wow and Flutter:  0,045% (WRMS)
Frequency Response:
Normal positionn Tape :  20 - 17,000 Hz (30 - 16,000 Hz ±3 dB)
High position Tape :  20 - 18,000 Hz (30 - 17,000 Hz ±3 dB)
Metal position Tape :  20 - 29,000 Hz (30 - 18,000 ±3 dB)
Signal-to-Noise Ratio:  60 dB (Dolby NR out, Metal position Tape)
A noise reduction of 10 dB above 5 kHz and 5 dB at 1 kHz is possible with the Dolby NR In.
Input Jack:
Microphone Jacks :  2
Minimum Input Level :  0,3 mv/600 Ω
Input Impedance:  5 k Ω
Optimum Mic Impedance :  600 Ω - 50 k Ω
Line IN : 2
Minimum Input Level :  50 mV
Input Impeance :  50 k Ω
Line Out :  2
Output Level :  350 mv (at 0 dB)
Optimum Load Impedance :  over 50 k Ω
Hedaphone Jack :  1
Impedance :  8 Ω/ 200 Ω
Components:  53 Transistors; 29 Diodes; 6 ICs; 4 LED
Power Supply:  AC 120 V, 60 Hz;  220 - 240 V 50/60 Hz
Power Consumption:  35 W
Dimensions (W x H x D):  418 x 120 x 270 mm (16-1/2" x 4-3/4" x 10-5/8")
Weight:  6,4 kg (14,1 lbs)

Onkyo TA-200

Type:  2-head, single compact cassette deck
Track System:  4-track, 2-channel stereo
Tape Speed:  4.8 cm/s
Heads:  1 x Record/Playback, 1 x Erase
Motor:  DC servo motor
Tape Type:  Normal, CrO2, Metal
Noise Reduction: HX-Pro, B, C
Frequency Response:  20 Hz to 17,000 Hz  (Metal tape)
Signal to Noise Ratio:  78 dB  (with Dolby C)
Wow and Flutter:  0.07%
Line Input:  60 mV
Line Output:  0.5 V
Power Requirements:  AC 220 V 50 Hz ; 22 W
Dimensions (W x H x D): 435 x 122 x 264 mm
Weight:  3.9kg

Advent 2

 Advent 2
If your budgett for stereo equipment is limited, and you would like the highest possible quality for what you spend, we believe a stereo system built around the Advent/2 loudspeaker may well be the best buy you can make.
We make that statment out of a conviction that the Advent/2 is a genuinely new kind of low-cost loudspeaker. Its sound quality is very close to that of the best speakers available at any price. It can fill a big living room with more than enough low-distortion sound to satisfy most people's greatest demands. And the bargain it represents is further increased by its efficiency, which is high enough to provide satisfying performance in average use with low-cost, low-power amplifiers and receivers.
The Advent/2 is the product of many years' experience in the design of speakers intended to offer better and better performance at lower and lower cost. Its overall design is based on evertything we have learned about talking the most simple and direct route to high performance, and we have put everything we can into it - including far more expensive basic loudspeaker components than ever before used in a system of its cost. Because it is intended to be first-quality in every sense, we have given as much attention to its appearance as to its performance, replacing the usual low-cost imitation wood cabinet with a distinctive  molded enclosure that we believe will look fresh and appealing for years to come.
The Advent/2 represents our best effort to provide absolutely eveything we believe important in a speaker for the lowest possible cost - and to bring genuine component stereo of very high quality to many people who otherwise might have to settle for something that only looks like the real thing.