User Manual: PSM2420
4+2 Channel Stereo Rack Mixer
V2.00 (05-2014) © Hill Audio
6
4. Main 1 stereo output. This is a balanced stereo output carrying the main
output signal controlled by (32).
5. Main 1 stereo output. This is an unbalanced output carrying the same signal
as output (4).
6. Subwoofer output. This is a balanced mono output for connecting an amplifier
driving a subwoofer system. Please note that the subwoofer output runs in
parallel to the Main 1 output, hence while the subwoofer upper frequency limit
can be adjusted by means of control
(7), no lower frequency limit is introduced
to the Main 1 output (4&5).
7. Crossover frequency adjustment of internal active crossover. Together with
the level control (8), this allows to set the upper frequency limit of the
subwoofer output (6). Choosing an appropriate crossover frequency will avoid
unpleasant interference effects with your main program speakers. Check your
subwoofer system specification to determine a suitable frequency.
8. Level control for subwoofer output (6).
9. Main 2 stereo output. This is an unbalanced output carrying the Main 2 signal
controlled by (33). This output can be used for a 2
nd
zone which needs
independent volume control, such as the DJ booth or the seating area of a
club.
10. Record output. This is an unbalanced stereo output carrying the same signal
as the Main 1 output (4/5), but not influenced by the main volume control (32).
This is normally used for recording the output to an external tape, CD or
memory device.
11. Phono Inputs. Depending on the position of the selector switches (13), these
RCA connectors provide the following inputs: (A) Position “PHONO”: input for
phono-level signals to the assigned channels, featuring the necessary RIAA
equalization. (B) Position “LINE”: input for line-level signals to the assigned
channels. Note that if the Phono inputs are not used and the sensitivity is
switched to “PHONO”, the inputs shall be terminated with the supplied
termination plugs (as factory-inserted at delivery).
12. Line inputs. These RCA connectors provide inputs for line-level signals to the
assigned channels.
13. PHONO/LINE selector switches for PHONO inputs. These switches change
the sensitivity of the PHONO inputs between PHONO (RIAA equalized) and
LINE level.
14. Microphone input for MIC1. This is a balanced XLR & ¼” TRS Combo
connector without phantom power provision, hence only suitable for dynamic
microphones.
15. Microphone input for MIC2. A ¼” TRS socket without phantom power
provision for microphone 2.
16. Talkover threshold control. The setting of this control determines at which
microphone level the automatic talkover starts to reduce the master output
level. In addition, the amount of reduction can be determined with the top
panel TALKOVER control (34).
User Manual: PSM2420
4+2 Channel Stereo Rack Mixer
V2.00 (05-2014) © Hill Audio
7
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Top Panel
17. Microphone equalizer. Allows the adjustment of the tonal balance for each of
the two microphone inputs in three voice-specific frequency bands with an
adjustment range of ±12dB.
18. Microphone level control. Sets the microphone level, provided that the
microphone(s) is/are switched on by means of switch(es) (18).
19. On/Off (ON AIR) switches for microphone channels.
20. Input selector for stereo channels. Switches between the inputs as indicated
on the front panel. A LED indicates the pressed position.
21. Gain control of input channels. Allows adjustment of the input sensitivity to
compensate for different source volumes.
22. 0dB LED. Facilitates proper setting of input gain levels. The LED lights up
when the signal after the Gain control (21) reaches 0dB.
23. Stereo channel equalizer. Allows the adjustment of the tonal balance for each
of the stereo inputs in three music-specific frequency bands with an
adjustment range of -26/+12dB, thus providing a virtual “kill” function for each
frequency band if set to extreme attenuation.
24. Channel fader for input channels. A high-grade dual rail 60mm fader
determines the volume of the respective channel.
25. PFL switch for stereo channels. Assigns the respective channel to the
headphone bus for pre-fader-listening (PFL). A LED indicates the pressed
position.
26. Crossfader assignment switch. Allows to route the respective channel either to
A (left crossfader side) or to B (right crossfader side) or directly to the master.
