T+A PA1230 R, Руководство пользователя

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Glossary
AUX
Universal pre-amplifier input ( AUX = auxiliary input) for
connecting high-level signal sources (i.e. signal sources
with an output level between 0.25 V and 4 V).
Balance
The balance control provides infinite adjustment of level
between right and left channels (shift of stereo centre),
e. g. to compensate for asymmetric speaker positioning.
To avoid any adverse effect on the sound, the balance
range is limited to +6 dB / -8 dB. It is never desirable to
reduce the volume of one stereo channel to zero.
Buffer amplifier
A buffer amplifier is used to provide an optimum match
between the pre-amplifier and any source devices with a
high-impedance output. However, they do represent an
additional stage in the signal path. High-quality Hi-Fi
units with a low-impedance output (< 100°
Ω
) do not
require such impedance matching. This applies to all
 source devices.
dB
The unit of measurement for electrical levels is the deci
Bel (dB).
FLAT
In FLAT mode the signals pass along the shortest
possible signal paths within the unit. All sub-assemblies
which are not absolutely essential (e. g. the tone
controls) are by-passed by means of high-quality gold-
contact relays in this mode. The frequency response and
phase response of the unit are absolutely linear in this
mode of operation. This means that the
FLAT setting
provides the most faithful reproduction and the highest
possible quality, and it should always be selected if the
tone controls are in the centre position in any case.
Loudness
A volume-dependent tone control ( Loudness ) circuit
which compensates for the frequency-dependent sensi-
tivity of the human ear at very low volume levels. At very
high volumes the loudness circuit has absolutely no
effect, but as volume is reduced the bass and upper
treble are lifted, in order to compensate for the reduction
in sensitivity of the human auditory system at low levels.
MC
Some analogue turntables are fitted with dynamic sound
pick-up systems (
MC = M oving C oil). The amplifier can
be fitted with an optional high-quality MC phono pre-
amplifier module whose input impedance and input sen-
sitivity can be adjusted to match all currently available
dynamic pick-up systems.
MM
Some analogue turntables are fitted with magnetic
sound pick-up systems (
MM = M oving M agnet). The
amplifier can be fitted with an optional high-quality MM
phono pre-amplifier module whose input impedance and
input sensitivity can be adjusted to match all currently
available magnetic pick-up systems.
RC
Control interface for  devices which are not fitted
with the R
LINK
system. The amplifier can be combined
both with RC units and R
LINK
units to form an integrated
Hi-Fi system.
R
LINK
Control interface for remote control of

source
devices, surround decoders and output stages. The pre-
amplifier / integrated amplifier receives the remote
control signals and passes them to the currently selected
source device via this interface.
Source device
The term source device refers to those elements of a Hi-
Fi system which provide a sound signal, such as tuners,
CD players, recorders etc. (signal sources). We have to
differentiate between listening sources and recording
sources.
•
A listening source is the device to which you are
currently listening. This device can be remote-
controlled.
•
A recording source is a source from which a recor-
ding can be made using a recorder (TAPE). A recor-
ding source cannot be remote-controlled.
Surround
Some signal sources (e.g. DVD or digital TV) supply
multi-channel sound using the DOLBY or dts standard.
Your
 stereo amplifier can be expanded with a
supplementary decoder to form a high-quality multi-
channel Hi-Fi surround system. Please ask your specia-
list

dealer for advice; he will gladly advise you con-
cerning multi-channel technology.