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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 740 loudspeakers

About The Aesthetics Of Sound
Just as serious listeners will strive for aural perfection, so Heco have added the dimension of visual perfection. This creates a harmonious product.
Heco is standing at the crossroads of science, technology and art.. The aim is demanding - to achieve the perfect, neutral reproduction of sound and to present it in a high-class design.
This has been a constant channenge; requiring knowledge, experience and creativity.
Heco has been building loudspeakers for many years and we have now come near to the ideal, both in aesthetics and in sound. A highly qualified staff along with advanced manufacturing procedures and innovative technology has been needed to achieve this. The result - a sound performance which equals the joy of art - today and tomorrow.
Integrated Subwoofer System ISS
Heco's new ISS technology skillfully blends and integrates an entire subwoofer system into each loudspeaker it incorporates a totally separte acoustic volume chamber within the cabinet and steep low-pass filtering for the subwoofer signal (18 dB/octave slope to 24 dB/octave slope according to model) with decoupling between 150 Hz and 250 Hz. All Superior models 9excepting the Superior 620) and the Interior models 330 S, 430 S, and 535 s can therefore be considered  as "cum basso continuo system" . The driver itself is suspended in a rigid casting of solid aluminium with a polypropylene cone.

Wide Bandwidth Midrange
When you listen to music the most critical area is the midrange, the frequencies between 300 and 3000 Hz. If this area is not correct, even the best woofers and tweeters can not save the sound.
Heco research has developed a new technology to reproduce this crucial region of music a new midrange driver which covers this entire range alone - without having to cross over to the woofer or tweeter
This design produces absolutely perfect phase coherency throughout the region. You can hear the result; smooth, clear natural voices and instruments.
Aluminium-manganese dome tweeter
Heco use their finest metal dome tweeters in the "Superior" and "Interior" models. Developed and manufactured by Heco, these drivers have exce[tional frequency response and power handling as well as a wide dispersion. They ensure smooth upper frequencies.
Specifications
Type:  3-way floor standing
Drivers:
1 x KHC 19 M
1 x TMC 170
1 x TC 170
Music Power Handling:  160 watt
Nominal Power Handling:  120 watt
Nominal Impedance:  4 Ω
Frequency Response:  28 - 35,000 Hz
Efficiency (1W/1m):  88 dB
Crossover Frequency:  150/3000 Hz
Suitable for Amplifier Terminal Resistance:  2 - 8 Ω (50 - 130 watt sinus/channel)
Suitable for Rooms u to:  60 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):  850 x 220 x 255 mm