AER amp one Panduan Pengguna - Halaman 8

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If you turn the balance control to the left (Fig. 2), the

bass range is further increased, but the treble is decrea-

sed by max. 0dB.

max

mid

min

100 Hz

balance in left position

A turning to the right (Fig. 3) affects an increase in treble

whilst at the same time reducing the bass.

max

mid

min

100 Hz

balance in right position

In its function and signal path the tone balance is deli-

berately designed as a somewhat „different" equalizer.

It offers a comfortable way of giving the original signal

more zip without distorting it. Especially on those occa-

sions, when the equalizer has to be used to suppress re-

sonance or feedback.

frequency

1 kHz

10 kHz

1 kHz

10 kHz

frequency

In use the signal level change can be kept constant at

a set ratio from a set threshold. The following figure

illustrates the correlation.

Fig. 2

threshold

On axes the input level (X axis = IN) and the output

level (Y axis = OUT) are shown in dB.

Along the 45° line the input and output levels are the

same – that means a compression (ratio) of 1:1 – there-

fore: no compression.

A compression of e.g. ratio 4:1 means that further in-

crease in level above the threshold will be maintained

at a constant ratio of 4:1. In other words: if the input

level increases by a factor 4, then the output level only

increases by a factor 1.

Fig. 3

This means that loud signals are muffled and the over-

all signal level becomes quieter. This difference in level

can mostly be compensated by increasing the master

setting without any difficulty. Then the signal is louder

and more compressed in total, because soft and loud

signals come closer together.

For a compression ratio of „infinite" to 1 (

we no longer talk about compression, but about limi-

ting. Die AER compressor switch here offers compressi-

on ratios of 1:1 to 5:1.

5.3 Compressor

A compressor is an electrical

circuit (a device) which you

can use to influence the dyna-

mic behaviour of a signal. The

aim can be, for example, to

minimise the risk of distortion.

ratio 1:1

ratio 2:1

ratio 4:1

∞

ratio

: 1

∞

)

ratio

: 1