4 Operation
After connection to the correct mains voltage, the ES 10 can be switched on using the <POWER
ON/OFF> switch.
The various functions of the system will now be described one after one.
4.1
Input Attenuators
The input attenuators consist of two 21-detent conductive plastic potentiometers. 11 of the
detents are calibrated in dB. The attenuators are used to mute the input signal or to adjust the
sensitivity of the ES 10 to other amplifiers. The sensitivity in the 0 dB position is +6 dBu for 35
V output (300 W into 4
Ω
). The relative sensitivity to other Stage Accompany amplifiers is:
ES 20:
-3 dB
ES 40:
-6 dB
SA 800:
0 dB
SA 1600
-3 dB
PPA 1200:
-3 dB
Attenuation in the complete counter clockwise position (-
∞
) is > 90 dB.
Warning:
For bridge mode operation, always set the input attenuators in the same position. If the
attenuators are not in the same position, either:
•
the amplifier can not deliver its maximum power
•
the most attenuated channel can run hot
•
at maximum power, the most attenuated channel will limit its output current first, result-
ing in distortion
4.2
Bridge Mode Switch
The <BRIDGE MODE> switch toggles the amplifier between stereo and bridge mode. In stereo
mode, the channel 1 input feeds the channel 1 amplifier, and the channel 2 input feeds the
channel 2 amplifier. In bridge mode, the channel 1 input connector feeds both amplifiers. The
channel 2 input is not used and is decoupled from the amplifier.
To prevent difficult output connections, the ES 10 is equipped with a unique separate bridge
OPERATION
stage accompany
R
ES 10 USER MANUAL
4-1
