Avalon VT-747SP Quick Setup Manual

LF and HF THRESHOLD
Range -15dB to +15dB, detent at 0dB,
INPUT GAIN
clockwise rotation raises the threshold
Trims input level
(less compression) and counter clockwise
-20dB to +8dB
rotation lowers the threshold (more compression)
detent at 0dB
at the frequencies set by the LF (low frequency)
(+18dB with +10dB IN)
and HF (high-frequency) spectral frequency
controls located directly below
THRESHOLD
+10dB switch
Sets compressor
Boosts input
input threshold
EQ to COMP
amplifier by
from -30dB to
Inserts the
+10dB for extra
+20dB
six (6) band
tube over-drive
EQ pre the
compressor
INPUT THRESHOLD
0
1 1 +2 3
0
3 2 6
6 4 -10 10
10 6 15 16
v
20 8 20 20
- dB + - dB +
t
GAIN
TSP
+10dB EQ COMP
IN IN IN
747
sp
ATTACK TUBE RELEASE
SIGNAL
PATH
FAST SLOW FAST SLOW
TSP
Twin Signal Path
ATTACK
Inserts spectral
Switch (in) swaps
Variable attack
three (3) tubes
time for the
into the audio
compressor
path from discrete
2mS to 200mS
Class A amps.
Variable release
TSP
time for the
TWIN SIGNAL PATH
compressor
100mS to 5S
Note:
For the best sonic performance,
a l l o w t h i r t y m i n u t e s f o r w a r m - u p .
When not in use, turn the ac off. This will
extend the life of the electronics . . Enjoy!
COMPRESSION
Blue LED SC Listen
Indicates Switch (in)
compressor for Spectral EQ
speed and into audio path
activation to monitor SC
SIDE-CHAIN THRESHOLD COMPRESSION
CONTOUR
5 6
4 7
3 8
2 10
1 20
-15 +15 -15 +15
LF HF
RATIO
METER
SIDE-CHAIN GR SC LISTEN COMPRESSOR
IN IN IN
CAL
GR
MAKE-UP
200 2k
160 250 1k6 2k5
+2 +6
100 300 1k 3k
80 400 800 4k
70 600 700 6k
60 1k 600 10k 0dB +10
Hz Hz
GAIN
SIDE-CHAIN
MAKE-UP
SPECTRAL
EQ into side-
0dB to +10dB
Sweep frequency
chain
variable gain on
for LF and HF
opto-compressor
bands, used with
RELEASE
above threshold
METER
controls
Recessed
screwdriver
adjust for 0dB
gain-reduction
meter trim.
STEREO SPECTRAL OPTO-COMPRESSOR WITH TSP
V T - 7 4 7 S P Q U I C K S E T - U P O P E R A T I N G G U I D E
FI
Boost-cut
sets amplitude sets amplitude
Sets ratio of
compressor of low-bass
-24dB to +24dB
from 1:1 to 20:1
detent at 0dB
15Hz
COMPRESSOR
Switch (in) engages shelf
compressor into
signal path
(hard-wire bypass)
AVALON
VA C U U M T U B E
POWER LED METER
Indicates ac High quality
power is on VU meter
indicates
gain reduction
0dB to -20dB
AVALON
Class A Vacuum Tube
VT-747SP
Avalon Design is a division of Avalon Industries, Inc.
SIX (6) BAND PASSIVE CLASS A, PROGRAM EQUALIZER
F2 F3 F4
Boost-cut Boost-cut Boost-cut
sets amplitude sets amplitude
of mid-bass of low-mid of mid-range
-8dB to +8dB -4dB to +4dB -4dB to +4dB
detent at 0dB detent at 0dB detent at 0dB
125Hz 500Hz 2kHz
peak-dip peak-dip peak-dip
3
2
1
+
0
-
1
2
3
CLASS A PROGRAM EQUALIZER
OUTPUT METER OUTPUT LEVEL
Fast LED meter Stereo output
indicates both L-R level control
spectral content -20dB to +6dB
and output level detent at 0dB
-30dB to +30dB
Note:
c 2000
F5 F6
Boost-cut Boost-cut
sets amplitude sets amplitude
of presence of treble
-10dB to +10dB -20dB to +20dB
detent at 0dB detent at 0dB
5kHz 32kHz
shelf shelf
OUTPUT
SIGNAL
0
1 1
2 2
30 4 3
24
8 4
18
12 AVALON
20 6
- dB +
6
+
0
EQUALIZER
-
6
IN
12
DESIGN
18
24
30
L R
dB
LEVEL
EQ
AC POWER
Switch (in)
Note: Check
activates 6 band
rear power input
passive EQ into connector for
correct local
audio path
ac voltage. Allow
(hard-wire bypass)
forty seconds for
the soft-start
procedure to
activate the
the audio
signal path.
Knob settings shown represent
starting positions only.