Passive PA kompletsæt søg...
  • Omgående disponibel
  • Sammenlign produkter
Kunde kommentarer
  • den 29.09.2011

    ukendt: "God service :-) Det er derfor jeg kun bestiller hos jer."

  • den 19.12.2011

    ukendt: "Jeg ved godt i er den bedste og billigste butik i verden."

  • den 04.05.2012

    ukendt: "Fine priser, fin side, det' hel' er bare fin nok!"

Online Guide Choosing a PA System
Introduction to Acoustics

 

The bad news is that every room is different. The good news is that a basic introduction to the
DiapasonOne of the three main categories of organ pipes that gives it the characteristic pipe organ sound. Also known as the principles along with the other sets reed, flute and strings.
principles
of acoustics should help you to solve most problems.

Sound waves prefer to travel in circles, like waves from a stone dropped into a pool. For PA purposes, this pattern is difficult to work with, so PA speaker
CabinetThe housing for a loudspeaker, often abbreviated to "cab".
cabinets
are engineered to direct sound in more manageable ways. Essentially, they project out into the auditorium before the sound begins to disperse into its natural pattern.

It’s worth trying to determine how your speakers radiate their sound, so you can place them to maximum advantage. And be careful how you place them in relation to each other - the sound from one speaker can cancel out the sound from another.

The one factor over which you have very little control is the room itself. Glass, concrete and tiles are the enemy of good sound, because they reflect sound waves all over place. Short of carrying your own supply of very thick foam rubber to fix to the walls, there's not much you can do, though you should try to place the speakers to keep the damage to a minimum.

A ‘sound check’ is essential, but take nothing for granted - a lot changes once people come in. The audience does at least help to reduce the reflected sound, but it’s vital for everyone on stage, and the sound engineer, to take note of the way the sound has changed and adjust their settings accordingly – it’s
NormalType of patchbay configuration in which a top row socket is internally connected by default to the corresponding bottom row socket; the connection may be broken by inserting a plug into one or both front panel sockets, depending on the type of normalling in use.
normal
to experience a substantial loss of high frequencies and
ReverbReverb is an effect that simulates the reflection of sound waves from the surfaces of an enclosed area such as a room or hall. After the initial direct sound arrives at the listener, reflections from the surrounding surfaces follow and gradually decrease in intensity as they are absorbed.
reverb
.

Your biggest challenge will come when playing in the open
AIRSome artists and producers believe that AIR - Always In Record - is a valuable technique, because it can capture moments of musical magic that may otherwise go unrecorded. It simply means that the tape or hard drive never stops running during a session.
air
. Sound waves lose their energy rapidly, so you will need a much more powerful system to cover a relatively small space.


DelayAn outboard unit used to create time dependent effects where a source signal is sampled/recorded and replayed later by a adjustable amount, either singly or in multiples. The amount of delay results in a range of effects from chorus and slap back to rhythmic echo. Also used for time correction in large PA systems.
Delay
line

In larger rooms, a
DelayAn outboard unit used to create time dependent effects where a source signal is sampled/recorded and replayed later by a adjustable amount, either singly or in multiples. The amount of delay results in a range of effects from chorus and slap back to rhythmic echo. Also used for time correction in large PA systems.
delay
line may be required. This is a system that delivers the sound to the back of the hall. However, for listeners sitting mid-way between the front and the back, or at the sides, there is a risk that the two speaker sets will conflict, creating a noticeable echo. In a
DelayAn outboard unit used to create time dependent effects where a source signal is sampled/recorded and replayed later by a adjustable amount, either singly or in multiples. The amount of delay results in a range of effects from chorus and slap back to rhythmic echo. Also used for time correction in large PA systems.
delay
line, a time
DelayAn outboard unit used to create time dependent effects where a source signal is sampled/recorded and replayed later by a adjustable amount, either singly or in multiples. The amount of delay results in a range of effects from chorus and slap back to rhythmic echo. Also used for time correction in large PA systems.
delay
is built into the signal path, equivalent to the distance from the front speakers, to ensure that the sound is delivered consistently to all areas.


Line array

Line-Array


A typical line array

Larger venues need larger sound-reinforcement systems, with more square inches of cone to push the
AIRSome artists and producers believe that AIR - Always In Record - is a valuable technique, because it can capture moments of musical magic that may otherwise go unrecorded. It simply means that the tape or hard drive never stops running during a session.
air
. The trouble is, the more speakers you have, the greater the risk that some of their frequencies will cancel each other out, and you will actually end up with a worse sound than from a single speaker. ‘Line arrays’ are designed to combat this problem, and have become the standard for larger arenas and outdoor events. They are built using speaker modules with clearly defined beam angles - that is, the breadth of coverage of the
AIRSome artists and producers believe that AIR - Always In Record - is a valuable technique, because it can capture moments of musical magic that may otherwise go unrecorded. It simply means that the tape or hard drive never stops running during a session.
air
pushed out. By aligning these modules carefully with each other, you can actually build a single, cylinder-like column of sound in which all frequencies are transmitted without conflicting with each other. You can also distribute a full sound to a large and scattered audience of the kind you get at festivals. Unless you are a professional sound engineer, however, you are unlikely to have to concern yourself with the complexities of line arrays. By the time you're playing venues where they matter, you can leave it to the roadies to sort things out!

 

[<< forrige side] [næste side >>]

 

Inholdsfortegnelse:

[Indhold] [Sound Sources & Signal Paths] [Microphones] [Cabling] [Mixers] [Amplifiers] [Loudspeakers] [Introduction to Acoustics] [Putting it all Together] [Examples] [Glossary] [Conclusion] [Hotdeals] [Feedback]