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CONNECTOR PANEL ON THE HECO BELLADONNA LOUDSPEAKERS / BI-WIRING AND BI-AMPING
The connector panels on the BellaDonna 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 crossover and the lower terminals to the bass side. An additional connector terminal
enables a 2dB treble boost option. (Fig. 3B, 4B, 5B)
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.
SINGLE WIRING OPERATION
Please fit the cable bridges provided as shown in Fig. 3A/B. To do this, loosen the respective screw
terminal and push the cable lug into the contact surface area. Then re-tighten the terminal screws.
Image A shows the connection for linear high-frequency reproduction, and Image B for high-frequency
reproduction increased by 2dB.
The speaker cable from the amplifier should always be connected to the lower pair of terminals!
BI-WIRING/BI-AMPING OPERATION
The cable bridges provided are not required. The connection to the amplifier(s) is shown in Fig. 4A/B
and 5A/B.
The appropriate setting depends on the listening space, on where the loudspeakers are placed and
naturally on personal taste. In rooms with high absorption (e.g. heavily upholstered furniture and
curtains), the +2dB tweeter setting is recommended.
HOW TO AVOID DAMAGE TO YOUR VALUABLE SPEAKERS
All HECO loudspeakers are designed and built for optimum sound reproduction with the tone controls
in the central position – i.e. with “linear” amplifier output. Turning up the bass and treble controls too
far delivers more power to the woofers and/or tweeters, and at high volumes this can actually destroy
the speaker units!
If the output of your amplifier is significantly higher than the rated power handling capacity of your
speakers extremely high volumes can physically destroy your speakers. This doesn’t actually happen
often but you should be aware that it is possible.
Weak amplifiers with low output ratings can actually be more dangerous for your speakers at medium
volumes because weak amplifiers may overload much faster than powerful ones and this causes
measurable and audible distortion, which is extremely dangerous to your loudspeakers.
Always turn the volume down immediately as soon as you hear distortion! If you like listening to loud
music make sure that your amplifier can deliver at least as much power as the speakers’ power-
handling rating.
THE SOUND YOU CAN’T HEAR..
Amplifiers, tuners and CD players can all produce inaudible high-frequency signals – and this doesn’t
only apply to cheap products. If your tweeters fail at low or medium volumes you should have a qualified
technician check your system components for dangerous inaudible signals.
