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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





Heco Superior 840 speakers

"Superior" by Heco is the loudspeaker range for audiophiles who cherish excellent sound and intelligent design for small as well as for larger rooms. "Superior" means sophisticated technology down to the smallest detail. And the bigger the speaker, the more power handling and growing deep bass reproduction. Dynamics and sound intensity increase. Allow your amplifier to shine; with a punchy bass, tight midrange and brilliant highs. Heco "Superior"; that stands for undistorted reproduction of sound, perfectly musical - for all those who love the extraordinary.

Woofer Chassis
The woofer is constructed on an extremely stiff chassis made of pressure-cast light metals. The cone diaphragm is made of a quality multilayer cellulose material, coated with a special synthetic layer for damping. The small, lightweight coils, made of best copper wire and which are therefore extremely low in resonance, feature a high constant power handling. In the case of floor standing speakers, the double woofers are pneumatically isolated from one another by means of separate chambers.
Cone Mid-Range Speaker
The range of fundamental tones between 300 and 3000 Hz, to which the human ear is particularly susceptible, have to be transmitted with the ulmost phase linearity. That is why this range is being reproduced by a sole driver a newly developed phaselinear basic speaker with an absolutely neutral sound Polypropylene diaphragm. With the interior 230 S the supronyl-dome-diaphragm has proved successful.

Tweeter Dome
For the high-ranges a special metal dome made of aluminium-mahganese is being used. The light, single-layer voice coils, the highly flexible supronyl suspension and its diffusor with pressure chamber effect allow the enormous range of 2 to 20 kHz. From the musical point of view this means high brilliance, impulse fidelity and great resistance without any sharpness in the reproduction of high frequencies.

Frequency Cross-over
The frequency crossover design shows an intelligent and ingenious construction in order to achieve minimum loss without any additional distortion during signal transmission. In practice this means.
An ingenious combination of air - core and ferrite-core coils, polyester capacitors and high-quality electrolytic capacitors with tight tolerances. The precision mounting of the components onto the circuit board with its engraved conductors ensure optimum decoupling of the components from each other.
Specifications
Type:  3-way floor standing
Drivers:
1 x KHC 19 M
1 x TMC 120
2 x TC 190
Music Power Handling:  200 watt
Nominal Power Handling:  140 watt
Nominal Impedance:  4 Ω
Frequency Response:  24 - 35,000 Hz
Efficiency (1W/1m):  88 dB
Crossover Frequency:  250/2500 Hz
Suitable for Amplifier Terminal Resistance:  2 - 8 Ω (60 - 150 watt sinus/channel)
Suitable for Rooms u to:  70 m²
Cabinet Finish:  Walnut , oak, Mahagany veneer. Ash-tree back or white; varnish black or white
Special Finish:  Piano black, Mahagany high
Dimensions (H x W x D):  950 x 240 x 275 mm
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