Avalon Design VP-737 User Manual

INPUT

Selects input source:

Line XLR balanced,
Instrument 1/4" jack

unbalanced, Mic

XLR balanced

PREAMP GAIN

Trims input level

Line -20 to +10dB (+18dB)

Inst -30 to +10dB (+28dB)

Mic 0 to +40dB (+58dB)

INPUT MODE

High gain

Line +8dB
Inst +18dB
Mic +18dB

Phase

inverts
the polarity of all
(3) input sources

+48v

phantom power

to Mic XLR input

THRESHOLD

Sets compressor

-30dB to +20dB

EQ to COMP

Places the
EQ pre the

compressor

METER

Selects gain-

reduction (in)

or output (out)

VT-737SP QUICK SET-UP OPERATING GUIDE

COMPRESSION

Sets ratio of
compressor

from 1:1 to 20:1

COMPRESS

Switch (in) engages

compressor into

signal path

VU METER

High quality

VU meter

indicates line

output level

or compressor

gain reduction

0 VU= +4dB

BASS

Boost-cut

sets amplitude

of low range

-24dB to +24dB

with center detent

at 0dB

Shelf response

LOW MID

Boost-cut

sets amplitude

of mid range

-16dB to +16dB

with center detent

at 0dB

Peak-dip response

HIGH MID

Boost-cut

sets amplitude

of mid range

-16dB to +16dB

with center detent

with center detent

at 0dB

Peak-dip response

TREBLE

Boost-cut

sets amplitude

of high range

-20dB to +20dB
at 0dB

Shelf response

OUTPUT

Trims final

output level

-40dB to +10dB

with center detent

at 0dB

0

3226

22 35

2

-

dB +

-

28 +9

v

737

t

sp

LINE

INSTRUMENT

HIGH Z INPUT

INSTRUMENT

1/4" unbalanced
mono phone jack.
1 meg ohm high-z

input for keyboards,

passive & active,

acoustic, bass and

electric guitars

INPUT

INSTRUMENT

LINE

3816
4210

45

HIGH PASS

FREQUENCY

60

55 70

45

40

35 120

30

140

Hz

FILTER

Variable

bass cut filter

6dB per octave

passive type

30Hz to 140Hz

INPUT
MODE

MIC

HIGH
GAIN

ON

PHASE

REV

+48v

ON PRE IN IN X10 IN X10 IN IN

FILTER

80

100

IN

HI PASS

engages bass

cut filter

Note: For the best sonic performance,

allow thirty minutes for warm-up.

When not in use, turn the ac off. This will

extend the life of the electronics . . Enjoy!

THRESHOLD

0

25

10 5

30 20

EQ COMP

FAST SLOW FAST SLOW

1015
1520

-

dB +

METER

ATTACK RELEASE

ATTACK

Variable attack

time for the
compressor

2mS to 200mS

(in)

Recessed

screwdriver

adjust for 0dB

when meter switch

(in) for gain-

reduction

COMPRESSIONPREAMP GAIN

65

4 7

1 20

RATIO

COMPRESSOR

VU

RELEASE

Variable release

time for the
compressor

100mS to 5S

VU

2

1

3

VU

0

1

2

3

+

83

102

5

10

7

20

-

decibels

AVALON

VACUUM TUBE

POWER LED

indicates ac

power is on

BASS

4-position switch

selects turnover

passive design

shelf frequency

15Hz to 150Hz

AVALON

Class A Vacuum Tube

DIRECT RECORDING SIGNAL PATH

VT-737SP

Avalon Design is a division of Avalon Industries, Inc. 2000

BASS

0

22

4 4

24 24

-

dB +

SHELF

30 60

15

Hz

66

1212

150

LOW MID

0

22

4 4

16 16

-

dB +

FREQUENCY

HI - Q

150 1k2

100 200

75

50

40 350

35

450

Hz

250

300

LOW MID

Vari frequency

35 to 450Hz

x10

350 to 4k5Hz

Bandwidth (Q)

(in) = narrow

(out) = broad

c

HIGH MID

0

21

3 4

66

1010

16 16

-

dB +

HI - Q

1k 1k4

550

350

250 2k5

220

2k8

Hz

HIGH MID

Vari frequency

220 to 2k8Hz

x10

2k2 to 28kHz

(Q=0.5)
(Q=0.2)

65

1010

1k6

2k

TREBLE

0

22

4 4

20 20

-

dB +

SHELFFREQUENCY

15k 20k

10k

Hz

32k

66

1212

OUTPUT

4 4

40 10

-

SC MIDS

TREBLE

4-position switch

selects turnover

passive design
shelf frequency

10kHz to 32kHz

EQ to SC

Routes the mid band

EQ sections (2) into the

compressor side-

chain for de-ess,

effects and frequency-

selective compression.

Note:

The bass and treble

EQ sections remain in

the audio path when

the EQ switch is (in)

0

22

66
88

dB +

EQUALIZER

AC

Note: Check

rear power input

connector for

correct local
ac voltage. Allow
forty seconds for

the tubes to

stabilize prior

AVALON

DESIGN

AC POWER

to use.