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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





Visualizzazione post con etichetta HECO. Mostra tutti i post
Visualizzazione post con etichetta HECO. Mostra tutti i post

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

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

Heco Precision 400 loudspeaker


Heco precision Series loudspeakers feature a patented woofer duet claimed to ensure accurae bass response. For prcise midrange and high frequency sound, both soft dome midrange drivers and tweeters utilize a special polymer material made exclusively for Heco.
To prevent the effects of spurious vibrations, the acoustic suspension cabinets are built of particle board that is "five times more dense than usually used for speaker cabinets".
All models have two environmental contour controls, a nominal DC impedance of 8 ohms, and an efficiency control rated at 91 dB/SPL at 1 m/1W.

Specifications
Type:  3-way acoustic suspension
Power Handling:  120 - 200 watts
Frequency Response:  25 - 25,000 Hz
Impedance Nominal :  4 ohms
Crossover:  600 Hz / 3,000 Hz
Drivers:
LF :  300 mm(12 inch) Woofer
MF :  50 mm (2 inch) Midrange
HF :  19 mm (3/4 inch) Tweeter
Volume:  66,0 litre
Dimensions (H x W x D):  650 x 375 x 270 mm

Weight:  19,0 kg

Heco Precision 300 loudspeakers


Heco Precision Series Model 300 

Specifications
Type:  3-way acoustic suspension
Power Handling:  100 - 170 watts
Frequency Response:  25 - 25,000 Hz
Efficiency Control Rated:  91 dB/SPL at 1 m/1W.
Impedance Nominal :  4 ohms
Crossover:  700 Hz / 3,000 Hz
Drivers:
LF : 245 mm (10 inch) Woofer
MF :  50 mm  (2 inch) Midrange
HF :  19 mm (3/4 inch) Tweeter
Volume:  41,8 litre
Dimensions (H x W x D):  500 x 310 x 270 mm
Weight:  16,5 kg

Heco Precision 200 loudspeakers


Heco precision Series loudspeakers feature a patented woofer duet claimed to ensure accurae bass response. For prcise midrange and high frequency sound, both soft dome midrange drivers and tweeters utilize a special polymer material made exclusively for Heco.
To prevent the effects of spurious vibrations, the acoustic suspension cabinets are built of particle board that is "five times more dense than usually used for speaker cabinets".
All models have two environmental contour controls, a nominal DC impedance of 8 ohms, and an efficiency control rated at 91 dB/SPL at 1 m/1W.

Specifications
Type:  3-way acoustic suspension
Power Handling:  80 - 140 watts
Frequency Response:  30 - 25,000 Hz
Impedance Nominal :  4 ohms
Crossover:  700 Hz / 4,000 Hz
Drivers:
LF :  230 mm (9-1/4) inch Woofer
MF :  50 mm (2 inch) Midrange
HF :  19 mm (3/4 inch) Tweeter
Volume:  31,1 litre
Dimensions (H x W x D):  460 x 290 x 233 mm
Weight:  12,5 kg




Heco Precision 100 loudspeakers


Heco Precision Series Model 100

Specifications
Type:  3-way acoustic suspension
Power Handling:  60 - 110 watts
Frequency Response:  35 - 25,000 Hz
Efficiency Control Rated at 91 dB/SPL at 1 m/1W.
Impedance Nominal :  4 ohms
Crossover:  1,000 Hz / 3,500 Hz
Drivers:
LF :  200 mm (8 inch) Woofer
MF :  38 mm (1-1/2 inch) Midrange
HF :  19 mm (3/4 inch) Tweeter
Volume:  21,2 litre
Dimensions (H x W x D):  400 x 250 x 212 mm
Weight:  9,7 kg