Vertigo Sound VSP-2 Operation Manual

Thank you for purchasing a VERTIGO SOUND PRODUCT.

The VSP-2 is VERTIGO SOUND’s third BIG IMPACT DESIGN and is setting
a new benchmark in microphone amplification.

The Vertigo Sound VSP-2

Dual Mic Preamp 1976

Operation Manual

The heart of this unit is Vertigo Sound 100% discrete Twin Op Amp circuit
called the OPA (operational amplifier) 1976.

These in house engineered and built discrete amplifier stage is combined
with Jensens world famous JT-16 Mic transformers and provide a smooth warm
and defined sound from the lowest bass to the the the very top end of the
sonic spectrum.The JT-16 transformer can handle very high input levels and provides
a very linear phase behaviour because of low capacitance problems due to it’s
low ratio of 1 : 2. Further the low ratio of the transformer forces the
discrete OP Amp to provide most of the amplification in the VSP-2. This full throttle,
pedal to the floor circuitry enables a unique, rich, full and charcterful sound.

Controls and Features

LED green:

– 6 dBu to 19 dBu at the output of the VSP-2

➞

reasonable output level

LED red:

+19 dBu at the output of the VSP-2

➞

close to clipping level.

Please use the Pad for the gain Settings
12 dB – 18 dB – 24 dB and 30 dB on !
The Pad does not effect the sound of your
signal but settings like 54 dB with Pad engaged
e.G. will worsen your signal to noise ratio.

LED green:

– 6 dBu to 19 dBu at the output of the VSP-2

➞

reasonable output level

LED red:

+19 dBu at the output of the VSP-2

➞

close to clipping level.

PHASE:

Reverses the polarity of the pre amp’s output.

02

Gain control:

10-position Grayhill Rotaryswitch with 6db step
increments. The full range of the unit is 12 – 72 db

Fine Gain control:

41 click Alps 0 – 6 db fine gain trim

120Hz / off / 80 hz:

Switch that engages lowcut input filter 12 db / oct
at 80 hz or 120 hz.

Signal and Clip LED:

This LED either indicates Green for a reasonable
signal level presence at the output or red for close
to Overload. There is no inbetween orange state
to indicate clipping clearly.

INSTRUMENT IN:

This is an unbalanced input for guitar, bass, samples,
etc. This unbalanced input goes directly to the
TWIN OPA input without using any circuitry inbetween.
(Real DI Input)
Simply throw the toggle switch and you’re off.
The output is muted when switching to avoid loud
clicks in your monitors.

48 V:

48 V switches ramped phantom power.

20 dB:

Pads the input signal 20 dB down. The pad does
not affect the input impedance of the VSP-2 !
The pad circuitry is switched out of the Input stage
completley when disabled.

> NOTE

The maximum output of the VSP-2 is
+ 24 dbU, the red clipping led indicates
the maximum capable input level of most
common converters and analog gear.