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

Bowers & Wilkins 802 D3

EISA AWARD Best Product 2016-2017
European High-End Loudspeaker:  
  If you’re looking for stunning realism without the studio-sized footprint, the 802 D3 is the answer. It’s slim proportions make it a comfortable fit for both domestic spaces and recording environments. At home or in the studio, it will reveal depth and detail in music you never knew existed.
The 802 D3 delivers pristine, high-performance sound in any environment. Its Diamond tweeter partners with a Continuum cone to ensure revealing natural sound that will leave you speechless.
Continuum cone
The Continuum cone delivers pristine midrange performance by effectively negating the break-up behaviour that can adversely effect this all-important part of the spectrum.
The innovative plinth provides an incredibly solid base for the 800 Series Diamond. The spikes are ideally positioned below the cabinet, and ingenious engineering allows you to switch between castors and spikes with ease.
Solid body tweeter
The Diamond dome tweeter is housed in a solid piece of aluminium. This mechanically inert structure provides an incredibly rigid platform from which the tweeter can deliver crystal clear sound.
Bracing is essential in keeping a speaker stable, so the character of instruments comes through cleanly. Developed using computer modelling and constructed from wood ply with metal reinforcement, Matrix offers the ultimate in bracing.
Technical Features: 
Diamond tweeter
Continuum cone FST™
Anti-Resonance plug
Turbine head
Aerofoil cone bass units
Optimised matrix
Solid body tweeter
System Description:  3-way vented-box system
Drive units: 
1x ø25mm (1") diamond dome high-frequency
1x ø150mm (6") Continuum cone FST™ midrange
2x ø200mm (8") Aerofoil cone bass units
Frequency Range:  14 Hz to 35 kHz
Frequency Response:  17 Hz to 28 kHz (±3 dB from reference axis)
Sensitivity:  90 dB (on axis at 2.83Vrms)
Harmonic Distortion:  2nd and 3rd harmonics (90 dB, 1m on axis)
Less than 1 % 80Hz - 20kHz
Less than 0.3% 100Hz - 20kHz
Nominal Impedance:  8Ω (minimum 3 Ω)
Recommended Amplifier Power:  50 W - 500 W into 8Ω on unclipped programme
Max. Recommended Cable Impedance:   0.1 Ω
Dimensions (H xW x D):  1212 x 390 x 583 mm (47.7" x 15.4" x 23")
Net weight:  94,5 kg (208 lb)
Finishes Cabinet:   Real wood veneers,  Rosenut  , Painted finish, Gloss Black, Satin White    
Grille:  Black or Grey

Elac Debut F6

EISA AWARD Best Product 2016-2017
European Loudspeaker
 The Debut F6 loudspeaker combines the advanced drivers of the B6 bookshelf in a floorstanding 3-way, bass-reflex design that takes Debut performance to the limit. With sound that rivals speakers costing many times more, the F6 shows that quality components and superior engineering are a winning combination every time. Combine a pair of F6 with a Debut powered subwoofer for a truly stunning two-channel audio system.
Custom-Designed Drivers with Aramid-Fiber Cones
Aramid fiber is employed in the woofers of all ELAC Debut passive speaker systems. Aramid fiber offers a superior strength-to-weight ratio and improved damping characteristics over conventional paper or plastic drivers. This added strength means arriving at designs that achieve a broader bandwidth with smoother response.
Silk-Dome Tweeter with Deep-Spheroid Custom Waveguide
The waveguide surrounding the new ELAC high-frequency driver features a custom, deep spheroid profile to improve directivity control and shield the dome tweeter from cabinet diffraction modes inherent in traditional box enclosures.
Intricate Cossover
A custom multi-element crossover with high-grade components in each speaker ensures smooth transition between the drivers.
Robust Cabinets
Every ELAC enclosure is engineered for the long run with thick MDF outer walls and a luxurious textured vinyl finish. The cabinet of the F6 incorporates specially designed internal bracing to add stiffness and strength to the cabinet’s outer walls. This bracing greatly reduces cabinet vibration, which causes unwanted coloration to the sound. ELAC believes that the only parts of a speaker that should be moving are the speaker drivers themselves.
Superior Build Quality
Count the parts and look at them closely. These don’t look like the components that go in such competitively priced speakers, but rather, speakers that cost much more.
Speaker Type:  3-way, bass reflex
Tweeter:  1 x 1" cloth dome
Midrange:  1 x 6.5" woven aramid-fiber cone
Woofer:  2 x 6.5" woven aramid-fiber cone
Crossover Frequency:  100 / 3,000 Hz
Frequency Response:  39 Hz to 20,000 Hz
Sensitivity:  87 dB at 2.83 v/1m
Recommended Amplifier Power:  30 to 150 wpc
Nominal/Peak Power Handling:  80 / 150 wpc
Nominal Impedance:  6  Ω; minimum 5.4 Ω
Binding Posts:  5-way metal
Magnetic Shielding:  No
Cabinet Finishes:  Black brushed vinyl
Accessories Included:  Removable fabric grille
Dimensions (H x W x D):  1092 x 216 x 254 mm (43" x 8,5" x 10")
Net weight (each):   21.2 kg (46.7 lb)

Technics SL-PS70

 The Technics SL-PS70 with its D/A converter section including MASH 1-bit DAC (multi-stage noise shaping), was able to perform distortion-free reproduction of low-level signals, as well as micro-signals embedded in large signals. The unit used a multi-layer vibration-resistant construction and centre mechanism, which thoroughly eliminated vibration and resonance, as well as four large insulators that reduced vibration from the floor. The line Out circuits included Technics' unique Class AA circuitry.  Also, the power supply circuitry was structured with the audio circuitry specifically independent from the transformer coils. In addition, for comprehensive operation convenience, functionality included CD editing with normal time edit and just time edit selectable, and time fade enabling automatic fadeout.

MASH - Multi-Stage Noise Shaping, is an effective oversampling D/A conversion technique which realizes a high Signal-to-Noise ratio and needs no highly complex manufacturing processes such as a laser trimming. MASH is a trademark of NTT.
Audio Section
Number of Channels:  two, stereo
Frequency Response:  2 - 20,000 Hz ±0,3 dB
Output Voltage:  2 V (at 0 dB0
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  112 dB
Total Harmonic Distortion :   0,003% 91 kHz, 0 dB)
Wow and Flutter:  below measurable limit
D/A Converter:  MASH (8 DAC)
Output Impedance:  approx 1 k Ω
Load Impedance:  more than 10 k Ω
Headphone Output level:  15 mW max. 32 Ω (adjustable)
Pickup Wavelenght:  780 nm
Power Supply:  110 - 127 V; 220 - 240 V, AC 50/60 Hz
Power Consumption:  11 W
Dimensiond (W x H x D):  430 x 126,5 x 332,5 mm
Weight:  5,2 kg

Pioneer PD-6500

 PD-6500 features:
Direct linear conversion.
1-bit D / A converter with double noise reduction.
8-times 20-bit digital oversampling filter
Intelligent digital servo: continuous accurate tracking with no thermal drift.
Simple lightweight laser pickup: reduces read errors and provides an accurate signal.
Anti-resonance and vibration design.
Disc stabilizer; honeycomb chassis; big feet; disc drive with low center of gravity;  engine equipped with ceramic shaft.
Audio Section
Type:  Compact disc digital audio system
Number od Channels: 2-channel stereo
Frequency Response:  2 Hz - 20 kHz
Signal-to-Noise Ratio:  106 dB or more
Dynamic Range:  96 dB or more
Channel Separation:  98 dB or more
Total Harmonic Distortion: 0,0027% or less
Output Voltage:  2,0 V
Wow and Flutter:  Limit of measurement (±0,001% W PEAK) or less
Requirements:  AC 110/120 - 220/240 V 50/60 Hz
Consumption:  16 W
Dimensions (W x H x D):  420 x 326 x 106 mm (16-9/16" x 12-13/16" x 4-3/16")
Weight: 4,3 kg (9 lb 8 oz)