SCHOEPS V4 U - Handbuch (Seite 10)

SCHOEPS GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 721 943 20-0 · Fax: +49 721 943 2050
www.schoeps.de · [email protected]
Applications for the V4 U / Startup
10
English
Applications for the V4 U
The V4 U is the ideal microphone for vocal
and instrumental solo work in recording and
broadcast studios. It offers the typical SCHOEPS
sound quality, with warmth and fidelity to detail.
It is extremely resistant to overload, since its
amplifier circuitry can handle very high sound
pressure levels (up to 144 dB SPL) without
distortion. That is a far higher level than
occurs at the bell of a trumpet, for example
(ca. 130 dB SPL).
The capsule head features a sturdy yet ele-
gant swivel joint which allows the capsule to
be tilted. Thus the microphone can remain ver-
tically oriented even when the sound source is
above or below the capsule.
Pop Screening
The V4 U has a two-layer screen built in. The
coarser layer offers protection from accidental
damage, while the finer layer guards the trans-
ducer from plosives and air movement.
For very close placement, a conventional
popscreen should also be used.
Capsule Swivel
The microphone capsule can be tilted ±20° by
means of a swivel joint, which does not require
(or permit) any lubrication.
Filters
When designing the V4 U, SCHOEPS consciously
chose to omit any switchable filters or attenu-
ators. The microphone’s very high maximum
SPL makes it practically overload-proof. But
low-frequency disturbances, due to plosive
sounds or handling noise for example, could
produce disproportionately large signal ampli-
tudes at the output. For this reason the V4 U
has a third-order filter which effectively sup-
presses noise below 40 Hz.
From a technical point of view, the V4 U is
built as a combination of two main compo-
nents: a transducer (capsule) and a microphone
amplifier.
The capsule is the component that converts
sound into a varying electrical voltage. It also
determines the polar pattern and, for the most
part, the sound quality of the microphone.
The amplifier of the V4 U generates the
voltage needed to polarize (charge) the capaci-
tive capsule. Its audio circuitry only amplifies
the current, making the signal low-impedance
so that it can be sent through a cable. The
output is electrically balanced in order to elimi-
nate electromagnetic interference in the cable.
This also prevents "AC hum,“ for example. The
V4 U has a transformerless output stage with-
out coupling capacitors, which allows both the
output impedance and the distortion to be
kept very low. Special RFI filtering prevents any
radio frequency energy picked up via the cable
(e.g. from mobile phones) from entering the
microphone’s output circuitry.
Startup
The amplifier of the V4 U is electrically active
and requires operating current. This will most
often be supplied by the inputs of a mixer,
preamplifier or recorder with suitable micro-
phone powering built in.
Like most modern, solid-state professional
microphones, the V4 U uses a standardized
powering scheme known as “phantom power-
ing.” Most recording equipment offers a 48-Volt
supply for such microphones.
Please note: Our microphones are developed
for, and tested with, power supplies that con-
form to the requirements of this standard.
Proper operation with non-standard power
supplies cannot be guaranteed. Circuit arrange-
ments that deviate from the standard can cause
operational problems (i.e. distortion or partial
loss of signal), particularly at high sound pres-
sure levels.