Quadral ALLGEMEIN - Manual (Page 6)

10
ENGLISH
11
Caution, clipping
Even if the rated output of an amplifier is significantly less than the load rating of the
connected boxes, the speakers can easily be damaged by improper operation. This is
because the rated output merely indicates how many watts the amplifier is capable of
supplying to the speakers without distortion. When an amplifier is overloaded, it not only
delivers a lot more power but also mixes in destructive direct current as well as high-
frequency oscillations. This phenomenon is known as clipping and can be heard in the
form of harsh distortion during loud passages. If you hear distortion, reduce the volume
immediately to avoid damaging the speaker units. Amplifier clipping is a typical overload
phenomenon that always occurs when you turn the volume and/or tone controls up too
high. Even in the middle setting of the tone control, normal amplifiers reach their limits
when loud pulses occur if you move the volume control significantly past the 12 o’clock
position.
Tips for better acoustics
1. Soft foam to prevent loud basses
Depending on the acoustic properties of the
listening room and the positioning of the
loudspeakers, bass notes can occasionally
appear too loud.
Some quadral speakers are therefore
shipped with pre-cut cylindrical pieces of
large-pore foam.
If low basses are unpleasantly loud in the
listening area, we recommend inserting
this foam cylinder into the bass reflex tube
of your quadral speaker. But avoid pushing it too far inside as you could have
problems removing it afterwards. A noticeable improvement in bass reproduction can
be achieved this way.
2. To achieve better acoustic isolation of the loudspeakers from the floor, some
floorstanding speakers are designed to accept spikes. Use of the spikes can be
advantageous, depending on the living room / floor.
3. To achieve better acoustic isolation of centre or shelf speakers from the surface on
which they stand, some of these loudspeakers are shipped with 4 self-adhesive rubber
feet.
Care of loudspeakers
Your quadral loudspeakers are best cleaned with a soft, dry cloth. The aluminium
housing is best wiped in a longitudinal direction with a damp cloth. Do not use solvents.
You should only clean the loudspeaker systems (woofer, midrange units, etc.) when they
have become very dirty (small amounts of dust have no effect on the acoustics). Use
a soft, dry cloth or a soft brush with very gentle pressure, otherwise there is a risk of
damaging the diaphragms.
We generally advise against cleaning the tweeter diaphragms because they are
extremely sensitive to pressure!
Light soil on the fabric front frame can be removed by tapping, with a vacuum cleaner,
or by using an adhesive tape when the front frame has been removed.
Heavier soil can be removed with a dry foam cleaner (such as Centralin spray). Never
use moisture to clean the front frame.
The technical details for your product can be found on the back of the speaker cabinet
or on the packaging!