Deqx HDP-4 - Profile Selection; Volume

Chapter 3. The Front Panel
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3.3 PROFILE SELECTION
The P1, P2 and P3 buttons are used to select a profile. Each profile contains a set of
correction filters and room EQ, so switching between profiles can be used to audition
different correction filters and for different listening situations. Use a single button to
select Profiles 1 to 3 and any two buttons to select Profile 𝟢.
x PreMATE+ and HDP-5: Press and hold the button or buttons for two seconds.
x PreMATE, HDP-4, and HDP-Express II: Press the button or buttons and release
immediately.
The LEDs light white to indicate the currently selected profile:
3.4 VOLUME
Press the up and down buttons to increase or decrease the master volume. The change
in volume on each button press depends on the current volume setting:
Current volume
Volume step size (approx.)
−24 to 0 dB
1 dB
−36 t0 −24 dB
2 dB
−48 t0 −36 dB
3 dB
−120 t0 −48 dB
6 dB
Below −120 dB, the DEQX is effectively muted. The Volume LED provides an indication
by color of the volume setting in 10 dB ranges, as illustrated in the diagram below.