Heco Concerto Grosso specifications

Brand : Heco

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Tech nical data

Special equipment

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Manufacturer: Heco
Model: Concerto Grosso
Versions: First and second version (Mk II)
Years of construction: 1989 - 1993
Manufactured in: Schmitten/Taunus, Hesse, Germany
Color: Walnut, oak, Black, white, piano lacquer black, sanding lacquer white, others for an additional charge
Dimensions: 415 x 1605 x 460 mm (W x H x D)
Weight: approx. 60 kg /box
Original price approx.: 10.000,- DM (RRP pair)

Type of construction: 3-way closed, floorstanding speaker
Chassis:
- Woofer: 3x 220 mm (cone, TC 220)
- Low-mid tone: 2x 170 mm (cone, TMC 170)
- High tone: 1x 19 mm (dome, KHC 19 M)
Load capacity (nominal/musical b.): 250/400 Watt
Efficiency: 88 dB
Frequency response: 16 - 35,000 Hz
Transition ranges: 180/3000 Hz
Impedance: 4 Ohm s

Woofer: 3x 220 mm (cone, TC 220)
Low-midrange: 2x 170 mm (cone, TMC 170)
Tweeter: 1x 19 mm (dome, KHC 19 M)

hexagonal LS housing for minimizing interference
black velvet flocked baffle
19 mm metal dome tweeter chassis (upper cut-off frequency >35 kHz)
Woofer and woofer midrange chassis each have a large square "frame" made of aluminum, which is an integral part of the construction of the speaker chassis, die-cast aluminum baskets, voice coils of large diameter, as well as oversized magnets
"Brilliance" switches for adjusting the tweeter level in the LS connection panel (only on the first version of the speakers)
Personal certificate for first-time buyers
Manufacturer's plaque, on request with the name of the first buyer
Plaque with the designation "Anniversary Edition 1989" and "Concerto Grosso No. ..." (Production number)

Special model for the 40th company anniversary of Heco in Schmitten/Taunus, Hesse
Limited edition of only 500 speaker pairs worldwide

Heco Concerto Grosso - first version - was only equipped with a low-midrange chassis
During the first version, the High-frequency chassis installed at the very top of the speaker.
In the following and revised version of the loudspeakers (Mk II), this is now in the type of d'Appolito arrangement between both cone woofers at the usual installation height.