Crest Audio HPW - Manual (Page 20)

p. 20
HPW TM owner’s manual
features overview 4
rear panel features
direct out 1/4" TRS jack - The input channel's signal is available at this output
jack. The default signal routing is derived Pre-fader/Post-EQ. This can be changed by an
internal option to Post-insert/Pre-EQ. The output jack is TRS, impedance-balanced.
insert jack - This switching 1/4” TRS jack allows an external signal processor to be
inserted into the signal path of the channel. The tip carries the SEND signal from the
channel, and the ring carries the RETURN signal back to the channel. The Insert-Send
point is located directly after the Lo-Cut filter on the
channel. The Return comes back into the channel at
the top of the EQ section.
Tip is Send, Ring is Return, Sleeve is Audio Ground.
Send (output) impedance is 50Ω
Return (input) impedance is 5KΩ
Nominal Operating Level is +4dBu
NOTE: To avoid any degradation of the HPW’s
channel signal, any processing gear patched into the
channel insert should have a low impedance output
(<100Ω) and must be capable of cleanly driving a
2KΩ load to +21dBu.
line in - The Line Input is a 1/4” balanced (TRS) 10k ohm input. The tip is the
positive input, which should be used for unbalanced inputs. It has less gain than the
XLR input and does not have Phantom Power available. The Mic and Line inputs
should not be used simultaneously.
balanced XLR input connector - This balanced female XLR accepts a low-
impedance microphone signal, or a line-level signal, depending on the position of the PAD
switch on the front panel. NOTE: Pin 2 on Crest Products will always be Hot for both
in and out connections.
NOTE: Directly adjacent to the stereo inputs
(rear panel) there are four channels of mono inputs.
On these four channels, there is a combo line/mic
input jack. The line input accepts a 1/4” balanced
(TRS) input or 6.3 mm plug.
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In situations where the
preamp circuitry is not
needed, the Insert Return
can be used as the channel’s input,
such as when using an expensive,
outboard tube mic preamp, for
example.
In these cases, the Tip contact of
the plug should not be connected.
The signal from the external pre-
amp should feed the Ring contact
(the Sleeve contact is the ground
return).
+
T he insert jack can also
be used as an additional
channel output when a Post-low
cut filter, Pre-EQ, Pre-fader signal
is needed. A “Borrow” plug can be
made by connecting the Tip and
Ring contacts together. The signal
obtained will be the Insert-Send
signal, but the channel signal path
will not be interrupted.
+