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Dear HECO Customer,
Congratulations on your fine new loudspeakers and thank you very much for choosing HECO! You
have made an excellent choice. The high-quality speakers produced by HECO are renowned all
over the world.
Please study the instructions and information below carefully before using your new loudspeakers.
GENERAL INFORMATION ABOUT CONNECTING YOUR HECO CELAN GT LOUDSPEAKERS
Please always use a good quality loudspeaker connection cable from an audio dealer. To prevent
impairment of sound quality, we recommend cables with cross-sections of at least 2.5 mm² for
lengths up to 3 m and at least 4 mm² for lengths above 3 m.
Always turn off the amplifier or receiver before connecting or disconnecting loudspeaker cables.
Place the loudspeakers in their planned positions and cut the cables to the right length. The cables
for both channels should always be exactly the same length.
Strip 10 – 15 mm of insulation from the ends of the cables. Twist the ends – this is much better than
tinning them with solder – insert them in the terminals and tighten the terminal screws firmly (fig.
1). Loudspeaker cables with CE-compliant banana or single-pin plugs (4 mm) or forked fittings can
also be used.
For good sound it is imperative that the cables must be connected in such a way that the speakers
are "in phase". This means that the black negative terminals on the speakers (-) must be connected
to the negative (-) terminals on the amplifier, the red positive (+) speaker terminals to the positive (+)
amplifier terminals. To make this easier one wire of most speaker cables is marked with a coloured
strip or a ridge in the insulation.
Before switching on the system double-check all your connections and make sure that the terminal
screws are tight and that there are no short circuits caused by stray wire filaments – this could
cause serious damage to your amplifier!
HECO CELAN GT - BI-WIRING AND BI-AMPING (CELAN GT 202, 302, 502, 602, 702, 902,
CENTER 32, CENTER 42)
Connector panel on the Heco Celan GT loudspeakers:
The connector panels on the Celan GT speakers are equipped with 5 terminal screws, enabling
bi-wiring/bi-amping in addition to conventional connection to an amplifier. The upper terminals are
connected to the treble and mid-treble side of the crossover and the lower terminals to the bass
side. An additional connector terminal enables a 2dB treble boost option.
Bi-wiring means using separate cables to carry the high and low audio frequencies. Bi-amping
takes this idea one step further and uses separate power amplifiers as well as separate cables for
high and low frequencies. Bi-amping in particular produces an additional improvement in sound
reproduction quality.
For conventional connections, metal bridges are installed as standard to make the +2dB
treble adjustment active. The bridge can be switched to the linear setting by unscrewing the
corresponding terminals. (Fig.2)
The terminals have to be removed for bi-wiring and bi-amping mode. Fig. 3 and fig. 4 show the
connection to the amplifier(s).
The right treble setting depends on the room, the positioning of the speakers and, of course,
personal taste. The +2dB setting is recommended for rooms with heavy upholstered furniture and
curtains, for example, which have a muffling effect.
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