33
Environmental aspects - care and maintenance
In the development of  loudspeakers we concentrate 
on innovative solutions to problems, and solid, well 
thought-out designs, but these are not our only concerns.
We place equal importance on the maintenance of all German and European safety norms 
and standards.
We are able to guarantee that our products are of the 
highest quality, and meet all our specifications in full, 
because we carry out strict quality checking of all materials, employ painstaking production methods controlled 
by highly qualified staff, and carry out a fully automatic, 
computer-controlled final quality control procedure.
At the earliest stage of development we also emphasise 
the importance of avoiding environmentally harmful materials and methods of working.
For example, we avoid the use of materials which are 
injurious to health, such as chlorine-based solvents and 
CFCs.
We also aim to avoid the use of plastics in general, and 
PVC in particular, in the design of our products.
Instead we rely upon metals and other non-hazardous 
materials which are easy to recycle.
Electronic sub-assemblies such as valve output stages 
are shielded by solid metal housings.
This excludes any possibility of external sources of interference affecting the quality of reproduction. From the 
opposite point of view our products’ electro-magnetic 
radiation (electro-smog) is reduced to an absolute minimum.
The particle board which we use meets the E1 quality 
standard in full. The board is manufactured without the 
use of chlorides, other halogens and timber preservative, 
and its formaldehyde content is checked at regular intervals by independent monitoring laboratories.
In ecological terms particle board is environmentally 
sound, because its use represents a significant ecological use of wood as a renewable raw material.
The sound-absorbent wadding used in our loudspeakers 
is made of 100 % polyester fibres, in conjunction with a 
binding fibre.
This material has been tested for harmful ingredients to 
Eco-Tex Standard 100; the same test is used for 
clothing, bedclothes, pillows, mattresses, household 
textiles etc.
The wadding we use has passed the „textiles tested for 
harmful materials“ test and fulfils the currently valid 
humane-ecological requirements. It has even successfully met the very exacting requirements of the standard 
test for baby clothing.
For loudspeaker transport we have selected a form of 
styrofoam packing which gives excellent protection and 
is environmentally non-harmful, because:
- Styrofoam is not foamed using CFC-based propellants,
but with pentane, which is a pure hydro-carbon.
- Styrofoam packaging is 100 % recyclable; it can be
disposed of, free of charge, at material collection 
centres and community recycling points.
- Styrofoam packaging requires for its manufacture 85 %
less raw material and 50 % less energy than comparable packaging made from other materials.
- Styrofoam packaging consists of up to 98 % air, and
2 % pure hydro-carbon.
- Styrofoam packaging has no harmful effect on ground
water.
- Styrofoam packaging helps to reduce freight costs and
transport damage.
Note:
The carton containing the styrofoam packaging has been 
designed specifically for our loudspeakers.
It forms a safe container if you ever need to transport the 
speakers, and helps to maintain their resale value.
Care and maintenance:
The surface of the loudspeaker cabinets should be cleaned simply by wiping with a soft, dry cloth.
Never use powerful cleaning agents or solvent cleaners!
If necessary, the front grille can also be cleaned carefully 
using a vacuum cleaner.
Please note that the drive units of some loudspeaker 
models are mounted immediately behind the cover, so 
don’t press too hard on them with the vacuum cleaner, 
otherwise you could damage the delicate loudspeaker 
chassis.
Loudspeaker cabinets finished in genuine hardwood 
veneers should be set up in a location away from direct 
sunshine; real wood changes colour when subjected to 
sunlight.
The only permissible method of disposing of 
this product is to take it to your local collection centre for electrical waste.