Roland SRA-200E - Manual (Page 8)

Connecting Other Devices
Stereo Connection
Channel A and Channel B may operate independently.
In this mode, the SRA-200E functions as a stereo power
amp, with 100 watts per channel (at 8 ohms).
● MODE switch: Set the MODE switch on the rear
panel to "STEREO."
● Connecting input: Connect the input carrying the left
signal to the Channel A INPUT connector, and the
input carrying the right signal to the Channel B INPUT
connector.
● Speaker connections: Connect the speaker for the left
channel to the Channel A speaker terminal, and the
speaker for the right channel to the Channel B speaker
terminal.
* Use speaker systems with a total impedance of 4
ohms or higher for each channel.
* Take care not to connect speakers to the terminals
with the polarity reversed.
● Adjusting the volume: Adjust the volume of the left
channel with the Channel A attenuator and the volume
of the right channel with the Channel B attenuator.
BTL Connection
If you need greater volume, you can connect a single
speaker to each SRA-200E. In this mode, Channel A
and Channel B are bridged internally by means of a
BTL connection. BTL stands for Balanced Transformer-
Less, and is a method in which the phase of one chan-
nel is inverted, and the output taken from the + jack of
both channels. This provides approximately double the
output voltage modulation, and in the case of the SRA-
200E allows it to function as a 300 W (8 ohm) monaural
power amp.
● MODE switch: Set the MODE switch on the rear
panel to "BTL."
● Connecting input: Connect the input carrying the
signal to the Channel A INPUT connector.
● Speaker connections: Connect the speakers to the
red Channel A and Channel B speaker terminals (BTL).
In this case, the polarity of Channel A is "+".
* Use speaker systems with a total impedance of 8
ohms or higher for each channel.
* Take care not to connect speakers to the terminals
with the polarity reversed.
● Adjusting volume: Adjust the volume with the
Channel A attenuator.
* The Channel B attenuator does not function in BTL
mode.
Signal
(Left Channel)
Signal
(Right Channel)
Left
Speaker
Right
Speaker
One SRA-200E connected to two speakers
Signal
Speaker
One SRA-200E connected to one speakers
8
Please refer to p. 10 and p. 11.