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V.A.S.

MIC-PRE

Operating Manual

Fredenstein V.A.S. Microphone Preamplifier

The V.A.S. Microphone Preamplifier is a single channel stand-alone device. The V.A.S. MicPre

features top of the line performance, key component to achieve this performance level is our new

OPA2 discrete audio operational amplifier. As all Fredenstein products, it is not a copy of an older

design, but a completely new circuitry manufactured in SMT technology. Matched and integrated

dual input transistors guarantee vastly improved specifications compared to older designs. The

OPA2, following the tradition of well known manufactures, is socketed and can be exchanged

without tools. The industry standard pin-out makes it compatible with many manufactures. Another

very important sound shaping component is the American-made steel-core output transformer,

which has this smooth vintage sound without being dark or just “mid-rangy” and at the same time,

the V.A.S. MicPre is very quiet.

A 100K Ohms high impedance direct input is located on the front-panel, it accepts balanced and

unbalanced signals, the rear microphone input is automatically disconnected when a plug is inserted

in the DI connector.

The features include a maximum gain of 65 dB, Output-Level Control, a 20 dB Pad, switchable

polarity, selectable input impedance, switchable Low-Cut filter, and Phantom-Power support. Our

new eight LED Peak-Meter with a 50 dB range gives the user a precise reading of the operating

conditions. For added versatility, a hybrid headphone amplifier with separate volume control is

integrated to allow precise monitoring.

The balanced input and the balanced output are available on XLR and TRS connectors. An

unbalanced insert is also provided to connect effect equipment.

With the optional rack mount kit, two V.A.S. devices can be mounted together to form a 19 inch 1U

enclosure (table feet need to be removed).

For easy touring and recording around the world, the V.A.S. MicPre has a built-in universal power

supply ranging from 90VAC to 240VAC, 50 -60 Hz.

As all Fredenstein products, the V.A.S. MicPre is designed by a German-American team and

manufactured in Taiwan.

Fredenstein V.A.S. MicPre Manual V1.1 Oct. 2, 2014 Page 1

Fredenstein V.A.S. Microphone Preamplifier

Installation:

Electrical Safety Warnings:

Do not open the enclosure, hazardous voltages are present inside!

There are no user serviceable parts inside.

If you need to replace the mains fuse, make sure the replacement has the same

rating (0.5AT 250V).

Rear View:

Please connect your microphone input and the output first to the XLR or TRS

connectors located on the back panel. Connect the mains cable to the V.A.S. MicPre

and then to a grounded mains outlet. The power ON/OFF switch is located on the

back panel near the power cable connector (IEC). After the unit is powered on, the

PWR indicator on the front panel will be illuminated.

An unbalanced insert is also provided on the back-panel to connect effect equipment.

Fredenstein V.A.S. MicPre Manual V1.1 Oct. 2, 2014 Page 2

Produktspecifikationer

Varumärke:	Fredenstein
Kategori:	mottagare
Modell:	V.A.S. Mic-Pre
Diameter:	165 mm
Luidsprekers:	2
Impedans:	4 Ohm
Typ av högtalare:	2-weg
Diameter woofer:	144 mm
Diameter högtonenhögtalare:	25 mm
Toppeffekt:	250 W
Tweeter:	Ja
Märkeffekt:	125 W
Separerade komponenter:	Ja
Passiv crossover:	Ja
Typ av diskantmagnet:	Neodymium