Ashly CLX-52 Specifications download pdf (Page 6)

Page - 6 Operator Manual – CLX-52 Compressor/Limiter

Physical Description

The CLX-52 is 1RU, and weighs eight pounds.

CLX-52 Front Panel

1. Gain – The Gain control adjusts incoming

signal level to the VCA circuit. It is always

active, so switching out the limiter function has

no effect on this control. This control should

normally be left at "0" to achieve accurate

Threshold calibration.

2. Threshold - The Threshold control has a range

of -40 to +22 dB, allowing applications from low

level compression to high level limiting. The

Threshold control determines the audio level

above which Gain Reduction occurs. When the

signal peaks exceed the selected threshold, the

LED comes on and gain reduction is occurring.

3. Ratio- This control determines the ratio of

change in output level to changes in input level

for signals above threshold. The numbers

printed around the Ratio control are calibrated

in db and indicate the increase in input (above

threshold) required to produce a 1db increase

in output. This can be expressed conveniently

as a ratio. If the output remains constant no

matter how high the input level, we have an

infinite (∞) input/output ratio. It should be

remembered that the Ratio control has no

effect on signals which are below threshold.

4. Attack Time - The response of the

compressor/limiter to signal levels above

threshold is further defined by the Attack Time

control. Attack time is the amount of time that

the unit takes to attenuate the output level after

threshold has been reached. This unit provides

continuously variable attack times from 200

microseconds to 20 milliseconds.

5. Release Times - Release time, is the time

required to restore system gain to normal after

the input signal has fallen below threshold

level. Proper release time will depend on the

type of program material being processed and

the way in which the limiter is being used.

6. Output Level - Output Level control is provided

to fully cut or restore up to 18 dB of system

gain. For unity gain, set the control to 0

7. In/Out Switch - This switch enables you to

quickly hear the CLX compressor/limiter in or

out of the audio chain. When the switch is in

the OUT position, all limiting and compression

controls and functions are bypassed, with the

exception of the Gain and Output controls,

which continue to function.

8. Stereo Tie Switch - This switch allows for Gain

Reduction on a stereo signal with no

degradation of the stereo image. When pressed

in, the Stereo Tie Switch combines each

channel's internal detector outputs so that the

channel with the loudest signal will determine

the action applied to both channels. Leave this

switch out for normal operation.

9. Threshold/Gain Reduction Display - As soon

as the threshold level is reached, the yellow

LED illuminates. Depending on how far the

input level rises above threshold, successive

red LED’s will illuminate, indicating gain

reduction. Gain Reduction can best be

described as the difference between input level

and the resulting change to output level. For

signals above threshold, output level will

increase only to the extent that the ratio control

allows.

10. Input/Output Meter Select - The While the

Gain Reduction display accurately represents

the action of the limiter, comparing input to

output levels in real time is somewhat more

intuitive, and is made simple using the Input/

Output Meter Select switch. The Input meter

takes its signal just after the Gain control, and

will indicate input signal level regardless of CLX

output levels or limiter settings. The output

meter display takes its signal from the actual

output of the unit, so every control that affects

the output will also have an effect on output

meters. Used in conjunction with the gain

reduction meters, Input/Output meters prove to

be an extremely useful diagnostic tool when

working with system dynamics and level

control.

A unique feature of Ashly Compressor/ Limiters is the incorporation of a double release-time constant. When a

conventional compressor/limiter is adjusted for slow release times, transients such as mic “pops” may cause a severe

reduction in gain followed by a slow fadeup, making the action of the limiter very obvious. With the double time constant,

release from gain reduction after a brief transient is always fast, with a slower release after a sustained overdrive.

Introduction - 4

CLX-52 – 5

Connectors & Cables – 5

Physical Description - 6

Front Panel

Rear Panel

Installation – 7

Typical Applications - 8

Troubleshooting - 9

Dimensions - 9

Specifications - 10

Warranty - 11

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Ashly CLX-52 Specifications Page 6

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