Plinius SA-250 Page 10 Instruction Manual Download

Page: 10 / 23

RCA BRIDGED MONO:

RCA BRIDGED MONO: This option configures your amplifier to drive one loudspeaker from one
unbalanced signal fed to the RIGHT RCA input. The loudspeaker is connected to both channels positive
(+) output terminals, giving an available power in this mode four times the rated output of the amplifier,
approximately 900 watts into 8 ohms. Special care must be taken in connecting the input signal and
loudspeakers to ensure safe operation and best possible performance.

XLR STEREO:

XLR STEREO: This option provides a stereo output signal from a balanced stereo input signal connected
to both the left and right XLR inputs. All the advantages of balanced line transmission will be realised with
good rejection of noise and some freedom from earth or ground loops (hum).

XLR BALANCED MONO:

XLR BALANCED MONO: In this mode both channels of your Plinius SA-250 combine to operate as a true
balanced mono amplifier, from input to output. This configuration provides the highest quality mono
performance from a balanced line input connected to the RIGHT BALANCED XLR INPUT. As with RCA
Bridged configuration, the loudspeaker is connected to both channels positive (+) output terminals.
Available power in this mode is four times the rated output of the amplifier, approximately 900 watts RMS
into 8 ohms. Special care must be taken in connecting the input signal and loudspeakers to ensure safe
operation and best possible performance.

BALANCED/UNBALANCED SIGNALS

Balanced or unbalanced input options will depend on the type of signal available from your preamplifier or
other equipment. The Plinius SA-250 provides both options to allow you to choose the most suitable
preamplifier for your purposes. Plinius Preamplifiers offer both balanced and unbalanced output options.

BALANCED LINE

BALANCED LINE is normally used to transmit signals in a professional environment. Because balanced
line effectively reduces or eliminates noise pick-up by the system cabling, it has become increasingly
more important in high-quality domestic high fidelity systems.

UNBALANCED

UNBALANCED leads such as single ended, RCA or coaxial are common and are used in the majority of
audio signal systems. The terminal plug and socket are most commonly called RCA and can be found on
your Plinius SA-250 for use as the standard input terminals for both left and right inputs.

OUTPUT TERMINALS - STEREO

Output connections for the loudspeakers are provided on the left and right hand side of the rear panel.
Two parallel pairs of binding posts for each channel are fitted – these provide ease of use with bi-wiring
and multiple cables requiring a large contact area.

OUTPUT TERMINALS - BRIDGED/MONO

In bridged/mono modes, the loudspeakers utilise only the positive (+) outputs of your Plinius SA-250. In
this configuration power output to the loudspeakers is dramatically increased (around four times as
much), and is commonly used in conjunction with another amplifier for amplification of each channel
from the preamplifier.