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Mic

Impedance

Mic

In

Balanced

Out

Line Out

12VAC

50

200

Insert

Tip=Send

Ring=Return

48

Volt

Meter

Input

Gain

Line In

Tube

Blend

Output

Level

Studio Projects

Tube Mic Pre

-8 0 +8 +15

-20

6

0

6

12

70Hz

Output

4

2

=

2

4

3

3

1

1

Line

In

Pol

Rev

Level

Input

HPF

SS

Tube

6

30

50

60

0

20

40

25

+

TIP

RING

SLEEVE

TO RECORDER:

RECORD-IN

FROM RECORDER:

PLAY-OUT

TO MIXER:

TAPE-IN

TO MIXER:

LINE-IN

-OR-

RING= Hot

SLEEVE= Ground

Studio

Projects

C1

Studio Condenser

STUDIO PROJECTS

(OR OTHER HI-QUALITY)

MICROPHONE

VTB-1
REAR CONNECTIONS

VTB-1
FRONT CONTROLS

INPUT GAIN: SETS THE LEVEL OF

SIGNAL FEEDING THE RECORDER

HI-PASS FILTER: AFFECTS SIGNAL

GOING TO THE RECORDER

TUBE-BLEND: ONLY AFFECTS THE SIGNAL

RETURNING FROM THE RECORDER

METER SELECT: LETS YOU VIEW THE

SIGNAL GOING TO THE RECORDER (IN),

OR FEEDING THE MIXER (OUT)

OUTPUT LEVEL: SETS THE AMOUNT OF

RETURNED SIGNAL FEEDING THE MIXER

POLARITY REVERSE: INVERTS THE
POLARITY (PHASE) OF THE SIGNAL

FEEDING THE MIXER

RECORD

PLAY

STUDIO PROJECTS

Because of its specially designed signal path, the VTB-1 can be used to both feed and
monitor a recorded track using its Insert Jack. The insert point is after the HPF, but
directly before the Blend Control. The signal feed from the insert jack is before any tube
circuitry, so the recorded signal will always be a SS only signal. The Playback output
from the Recorder uses the return path of the insert jack which directly feeds the Tube
Blend control and then the Output Level pot. By using the Blend control, the user can
add the desired amount of Tube Sound at the final mix stage instead of when tracking.
This allows for more variety during mixdown and contributes to less finger-pointing when
it’s decided that the sound you originally recorded is not really what you want now.

VTB-1 HOOKUP DIAGRAM

Using the VTB-1 for clean

recording, with the option of

adding “Tube Sound” to the

track during mixdown.

NOTE: The VTB-1 meter is calibrated
for Pro level operation (+4dBu). The
meter may stay in its lower ranges when
driving semi-pro gear (-10dBV levels).
If your equipment has a level-select
switch, set it for +4 operation for best
results and quietest operation.

NOTE: RCA connections shown, but use the correct

cable and connectors for your particular setup.

TIP= Hot

SLEEVE= Ground

Connections to the 1/4” TRS Insert Plug:

NOTE: Microphone
input shown, but this
setup works the same
way for Line-In signals.
Use the front-panel
jack and switch to bring
instruments into the
VTB-1.

Using the VTB-1 for feeding and

monitoring a recorded track

Insert
Return

Insert

Send

NOTE: Plugging into the Insert
Jack interupts the normal signal
flow thru the VTB-1. If the
recorder is OFF, or no playback
is available, no signal will show
in the meter (OUT) or be
present at the Bal Out or Line
Out of the VTB-1.

1/4” TRS

Insert Plug

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