Heco Superior 740 specifications

Brand : Heco

General

Tech nical data

Special features

Volume: x liters Other models of the same series:

Light center sink, slightly weaker than the Superior 840.

These floorstanding speakers were tested in "Stereoplay" 7/89: points 29-31, top class III. The Heco Superior 1040 (reference class) got 8/89, 33-35 points.

ISS is a subwoofer system developed by Heco . The low-frequency systems work in completely separate acoustic chambers and become extremely steep-sided (18-24 dB / Oct.), decoupled between 150-250 Hz. The result: a precise, extremely deep bass. All Superior models(except Superior 620)can therefore be regarded as "cum basso continuo system". The basis of the ISS technology is a low-midrange loudspeaker, the so-called fundamental driver. The fundamental range between 300 to about 3000 Hz, which is particularly critical for hearing, must be reproduced as true to phase as possible. If the fundamental range is not transmitted in a time-accurate and sound-neutral manner, the overall reproduction of instruments and voices may not be reproduced true to the original and be free of discoloration. Therefore, this range is reproduced by only one phase-stable converter. This low-midrange speaker is equipped with a low-resonance, true-to-sound polypropylene cone diaphragm, which is installed in a torsion-resistant die-cast light metal chassis.

Test in Stereoplay 7/1989: Top class III

Manufacturer: Heco GmbH
Model: Superior 740
Years of construction: from 1989 - around 1990
Manufactured in: D-6384 Schmitten/Ts.1 Federal Republic of Germany
Color: Walnut veneer, oak veneer P 43, mahogany veneer P 36, ash black, ash white; Special version sanding varnish black, sanding varnish white, others on request
Dimensions: 850 x 220 x 255 mm (H x W x D)
Weight: 16 kg
Factory price approx.: 2000,- DM / pair

Type of construction: 3-way closed, floorstanding speaker
Chassis:
- Woofer: 1x 170 mm (cone, TC 170)
- Midrange driver: 1x 170 mm (cone, TMC 170)
- Tweeter: 1x 19 mm (dome, KHC 19 M)
Power handling (nominal/music): 120 / 160 watts
Efficiency: 88 dB/1W/1m, maximum sound pressure: 102 dB/1m
Transmission range: 28 - 35,000 Hz
Transition ranges: 150 / 3,000 Hz
Impedance: 4 ohms

Woofer: 1x 170 mm (cone, TC 170)
Midrange driver: 1x 170 mm (cone, TMC 170)
Tweeter: 1x 19 mm (dome, KHC 19 M)