Vienna Acoustics Bach Bedienungsanleitung

4. March 2004

CABINETS

Our speaker designs feature massive and inert cabinet

construction. Vienna Acoustics cabinets are designed with the

latest computer modelling techniques and use a combination

of amorphous materials in order to ensure that they are both

stiff and well damped. Additionally, our designs feature narrow

front baffles in order to promote accurate imaging. The

combination of precise build construction using furniture grade

finishing techniques and complex internal damping produce

designs capable of accurately rendering music.

CONNECTIONS

The massive Vienna Acoustics input terminals are designed to

accept banana plugs, spade terminals or bare wire connec-

tion. Make certain that all connections are well tightened

since poor contact between speaker cable and input

connector can lead to degradation of sound quality.

It is also a good idea to make a point of regularly cleaning all

connections in your system since oxidation will build up on a

regular basis. We use gold plated terminals which do not

oxidize, but contaminants or surface build-up on your spea-

ker cables and connectors may degrade sound quality.

While it is popular among some audiophile circles to fit

duplicate sets of binding posts for "bi-wiring", we have cho-

sen to follow sound engineering practises. Our crossovers are

configured as an organic whole, intended to optimize every

known aspect of driver integration.

It is our belief that with the high quality of wire currently

available, it is in most cases possible to obtain higher

performance from a single run of superior cable to two lesser

runs of cable. By keeping a single ground plane in our

crossover design, we are better able to control the many

variables that can be negatively affected by poorly executed

bi-wiring choices. The result for you is consistently superior

musical reproduction.

CABLING

We encourage and recommend the use of high quality speaker

cables and believe them to be an important tool for the

enthusiast in obtaining maximum enjoyment from their music

reproduction system. High quality cabling is a significant tool

in the finetuning of a system for performance. As with any

purchase, listen carefully and allow your ears to guide you.

It is beyond the scope of this manual to provide a useful

compendium concerning cables, or to make specific brand or

model recommendations. A number of high quality maga-zines

do in fact list cable recommendations.

AMPLIFICATION

Our speakers demonstrate outstanding sonic results with a

variety of amplifier types. They feature a combination of high

efficiency and gentle impedance curves that allow them to be

used with either solid state or tube electronics.

However, it is still important to select an amplifier with care

since the full potential of your system will only be revealed by

quality electronics. Amplifier designs do have distinct and

different sounds.

It is important to listen carefully to the match of amplifier and

loudspeaker to ensure that the combination works well

sonically for you. Though rated amplifier wattage bears little

correlation to either sound quality or drive capability the user

is cautioned that amplifiers of low wattage ratings, when

stressed beyond their limits will produce audible amounts of

distortion. This distortion can and will damage loudspeaker

components and will not be covered by warranty.

BURNING OR BREAKING IN NEW

LOUDSPEAKERS

Your loudspeakers contain a large number of precision built

moving parts. These parts require playing time initially to

develop their maximum smoothness and extension. Very

audible improvements can be observed during about 30 hours

of playing. Additional improvements will be evident after 100

hours of playing time, at which point the speakers have

reached their full musical potential.

POSITIONING

Room acoustics and positioning of the speakers within the

room have an important effect on sound quality. To find the

optimal position for your speakers we offer the following hints:

FREE AIR SET-UP

If the room is large and space permits, allow a minimum of 1

meter away from the rear wall (the wall behind the spea-

kers). Small movements of the speaker forwards and

backwards will establish where a speaker sits most com-

fortably. Find the location that gives a full balance without

sounding heavy.

Remember, in a free air set-up the distance from the rear wall

determines how low the speaker will go in a room and also

determines depth of image. Positioning too close to a

rear wall may boost the middle bass frequencies and rob the

speaker of some transparency and precision. In general, it is

best to avoid corner placement of loudspeakers since

the

bass tends to become exaggerated and corners rarely are an

optimal placement for image quality.

NEAR WALL POSITIONING

Many people will simply find it undesirable or disruptive to

place speakers in "free space", that is well away from the

back wall. Vienna Acoustics loudspeakers may be set-up close

to a rear wall, though keep in mind that less toe-in, as

described below, will probably be needed. When working close

to a rear wall, even the tiniest movements will have a

relatively important effect on sound quality. Work slowly and

methodically, following the instructions below and good sound

quality can be achieved.

DISTANCE BETWEEN THE

SPEAKERS AND TOE-IN

Most stereo systems are set-up with their speakers too close

together. As a rough guideline, the distance between spea-

kers should be about 70 % of the room width as a star-ting

point, assuming that your speakers are aiming down the

length of the room.

Too close together and they will create "ghost" images,

double images that blur clarity and focus. Too far apart and

they will begin sounding thin and in extreme cases, will create

separate left and right soundstages. Move them inwards and

outwards, again in small movements as though you were

adjusting the image on a pair of binoculars until a single well-

unified image is obtained.

Toe-In: In an ideal room, the speakers may be set-up so that

the speakers fire directly forward. For the rest of us, some

degree of toe-in, that is rotating the speakers cabinets until

they point at the listener is desirable. Toe-in reduces sidewall

reflections of the mid and upper frequencies. Though one

might reasonably conclude that aiming a speaker at the

listener would result in a brighter sound, this is actually NOT

the case. Toeing a speaker inward will result in a smoother,

warmer and usually more focused sound.

Important Tip:

The distance between speakers is interrelated to the degree

of toe-in. If a speaker loses clarity from toeing in, try

increasing the distance between them slightly. This will have

the effect of "opening up" the speaker and restoring clarity.

ROOM TREATMENT

Good sounding rooms have a well-balanced acoustic. This

does not mean that your home should look like a recording

studio. Commonly found furnishing such as bookshelves,

carpeting and furniture all exhibit beneficial amount of

absorption and dispersion. Rooms with little furniture,

carpeting or other surfaces will demonstrate poor damping and

will produce a hard, bright sound.

As a general rule, it is helpful to have more of these sorts of

things in the space immediately around the speakers than

scattered throughout the space. A thick carpet or area rug

mounted between your listening position and the speakers is

of tremendous benefit in controlling reflections off the floor.

Tapestries, hanging rugs and/or drapes on the side walls hung

slightly ahead of the speaker position will damp reflections off

these surfaces.

OPTIONAL SANDFILLING

Some of our floorstanding models feature an additional hidden

chamber accessible through the base that may be sand filled

for the final touch in system tuning. Sand filling is an

easy and cheap way to improve the reproduction of the bass

range. It raises the weight and stability of the system and

quiets the enclosures throughout a remarkable damping

effect. To fill in the sand, put the speaker on the top on a

soft cloth to protect the cabinet. Then fill in the sand through

the central hole at the base until the chamber is completely

filled up and seal it with the black stubble.

!Do not use moist sand -it can damage the wooden cabinet!

MAINTENANCE

Your speaker cabinets can be cleaned periodically with a soft,

slightly damp cloth. It is not necessary to wax them. Our

cabinets feature a smooth but strong finish. Still, please keep

them out of direct sunlight and heat, since the colour of the

veneer would pale. Should the bass drivers become dusty, it

is safe to use a soft brush to clean the woofers.

* Under NO circumstances should you attempt to clean dust

from the tweeter. Doing so will damage the delicate silk

domes.

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