Operation and
Controls
Page 16 Avalon Vt-737sp Operation Manual
Sets the compression ratio. Continuously vari-
able from 1:1 to 20:1.
When switch is engaged, the compressor is
inserted into the signal path. When disen-
gaged, the compressor section is hard
bypassed by a sealed silver-contact relay.
Can be selected with the METER switch to
indicate either output level (non-illuminated) or
compressor gain reduction (illminated). The VU
meter’s needle is also speed sensitive for mea-
suring gain reduction. This helps in setting the
ATTACK and RELEASE of the compressor
Sets amplitude (cut/boost)of bass band. Vari-
able +/-16dB, with center detent.
Sets amplitude (cut/boost) of low mid band.
Variable +/-20dB with center detent.
Sets amplitude of high mid band. Variable
+/-16dB, center detent.
Sets amplitude (cut/boost) of shelving treble
frequency band. Variable +/-20dB with center
detent.
Inserts both of the mid band filter sections of
the equalizer into the compressors’ control
path, allowing for frequency-selective com-
pression applications (e.g. de-essing vocals).
Adjusts the final output level. Variable -45dB to
+10dB, with center detent at 0 dBu.
Inserts equalizer into signal path. When disen-
gaged, equalizer section is hard wire bypassed
by a sealed silver-contact relay.
1/4” unbalanced phone jack. High impendance
input selected when INPUT is in INSTRUMENT
position. Also known as D.I. (direct input. Instru-
ments such as electric guitars and basses can
be directly plugged into this jack via a standard
shielded guitar cable.
Continuously variable rotary control that varies
the cut-off frequency of a passive high-pass
filter on the output of the preamp section. This
simple, smooth filter rolls off the low-end
frequencies and works well for reducing room
rumble, muddiness or microphone handling
noise.
Engages the preamp high pass frequency filter.
When the FILTER switch is not engaged, the
filter is hard wire bypassed.
48V phantom power is applied to microphone
input XLR. Both pins 2 and 3 carry 48V. Phan-
tom power is necessary for most condenser
microphones that do not have their own exter-
nal power supply.
A microphone that requires phantom power
will not work unless the +48V switch is
engaged.
8 COMPRESSOR
9 VU METER
10 BASS
11 LOW MID
12 HIGH MID
13 TREBLE
14 SC->MIDS
7 COMPRESSION (RATIO)
15 OUTPUT
16 EQUALIZER
17 INSTRUMENT (HIGH-Z INPUT)
18 HIGH PASS FREQUENCY
19 FILTER
20 +48v
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