Hardware manual

ManualsBrandsCrest Audio Manualsaudio & home theatreNEXSYS - VERSION 3.0

Crest Audio Inc. NexSys v. 3.0

9. Controlling Ampliﬁers

9.1 Ampliﬁer Controls

Double clicking on an ampliﬁer channel in list view (in a group or in the Plan Inventory)

will open its control panel. Selecting Device | Control from the menu is another way to

open a control panel. The ﬁgures below show the single ampliﬁer control panel. Variations

of this control panel appear in the group console view, the most comprehensive of which is

depicted in the ﬁgure on the right. Note that the descriptive callouts in the ﬁgures below

apply to both variants of the control panel.

Single ampliﬁer control panels

Ampliﬁer Level Control

Each ampliﬁer channel’s attenuator operates within a range from no attenuation (0dB) to full

attenuation (-83dB). For convenience, the fader functions in three ways. The fader’s “knob”

or “thumb” itself may be grabbed and continuously raised up and down. For quick and large

steps, clicking in the area above or below the thumb will change the level in 10dB incre-

ments. For ﬁner 1dB steps, click the arrows at the top and bottom of the fader.

Pressing the left mouse button on the fader changes the cursor to a hand. This indicates that

the cursor cannot be moved off of the fader until the left mouse button is released -- pre-

venting undesirable gain changes from occurring accidentally.

Ampliﬁer Mute Control

Pressing the mute button will fully attenuate the channel. Releasing the mute button will

restore the level to that shown by the fader. A channel may have been muted by some other

object in NexSys (see Section 9.4 on Control Hierarchy.) If so, pressing the mute button will

unmute it. This is because NexSys gives control changes at the ampliﬁer control level the

highest priority. Therefore, a channel that has been muted at the ampliﬁer cannot be unmut-

ed by a group or the plan.

VU’s

Input Level (on left) &

Output Level (on right.)

Hand cursor constrains

the mouse from moving

off of the fader until the

mouse button is

released.

Mutes this channel.

Solo’s this channel by

muting ALL other

channels in the plan.

Current gain.

+1 dB

+10 dB

-10 dB

-1 dB

Audio Return Monitor (for systems

with optional load monitoring)

Continuous

Heatsink Temperature

Polarity

Software Manual Page 9.1

Double-click the Heatsink

Temperature to change it

between Celsius and Fahrenheit.