H A R D W A R E I N S T A L L A T I O N C H A P T E R 1
(13) Line-Out and Line-In Audio Jacks
Consumer level (-10 dBV) audio connections. Audio levels can be set on the FLEX-5000 Mixer Form
(see page 148).
Line-Out can drive external sound card-based applications if VAC is not, or cannot be used. It
can also provide audio for external audio equipment such as recorders and audio spectrum
analyzers. Line Out impedance equals 600 Ohms.
Line-In allows the connection of external audio equipment, VAC or an external sound card,
e.g. to play back prerecorded audio over the air. Line In impedance equals 5 kOhms.
(14) Balanced Line Input
1/4” TRS jack to connect to audio processing equipment supplying balanced audio (+4dBμ max), such
as a microphone preamplifier or (chain of) equalizers, compressor/limiters, aural exciters and other
effects processors. This jack can be used instead of the Microphone connector on the front panel.
However, unlike the front panel Microphone connector, there is no 20dB preamp in line. The Pin-Out is
shown in Table 6 below. Balanced Line Input input impedance is >50 k Ohms.
Table 6: Pin-Out of Balanced Line-In Connector
Contact Description Connector
Tip
Positive phase for balanced
mono signals or mic (+)
Ring
Negative phase for balanced
mono signals or mic (-)
Sleeve Ground or shield connection
Connecting to a Balanced XLR Connector
The most common way to use the balanced line-in connector is when using a balanced microphone,
usually having a male XLR connector (see Table 7 below).
Table 7: XLR Male and Female Connector Pin-out
Contact Description Connector
Pin 1 Ground or shield connection
Pin 2
Positive phase for balanced
mono signals or mic (+)
Pin 3
Negative phase for balanced
mono signals or mic (-)
11 2003-2008 FlexRadio Systems
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