Plinius Audio SB-301 - Manual (Page 11)

9 POWER AMPLIFIER
2. AMPLIFIER CONFIGURATION SELECTOR (ACS)
The Amplifier Configuration Selector (ACS) is a unique switching method that exploits all of
the operational features of your Plinius SB-301 MKII Power Amplifier. By using this switch it
is possible to operate your amplifier with either balanced or unbalanced signals.
The ACS switch options are:
•
RCA STEREO: This option provides a stereo output via both left and right output
channels from a stereo signal connected to both left and right input RCA inputs.
• XLR STEREO: This option provides a stereo output signal from a balanced stereo
input signal connected to both the left and right XLR inputs.
BALANCED/UNBALANCED SIGNALS
Balanced or unbalanced input options will depend on the type of signal available from
your preamplifier or other equipment. The Plinius SB-301 MKII 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 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 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 SB-301 MKII for use as the
standard input terminals for both left and right inputs.
3. OUTPUT TERMINALS
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.
4. MAINS SWITCH
This heavy-duty rocker switch in the centre of the panel turns the Mains/Line Power
to the amplifier ON or OFF. An LED in the centre of the front panel indicates that
the power is on. When first switched on the power LED will vary in brightness for
ten seconds – this is an initialisation sequence, after which the power LED remains
lit. The amplifier draws a moderately high current when switched on. Despite the
“Soft Start Circuit” within the amplifier reducing current demand on the mains as the
amplifier is switched on, it is not good practice to rapidly turn the Mains switch on and
off repeatedly.
5. MAINS POWER CORD IEC CONNECTOR
This connector is where the mains supply cable from your wall connects to the