4.2 Additional useful tips
Depending on the respective application, the guitar amp can be used in various modes:
Stereo
Both power amp channels operate independently of
each other, each input (CHA and CHB) is amplified by
one channel, speakers are connected to both channels,
the volume for both outputs can be controlled sepa‐
rately.
Bridged
Both power amp channels are internally wired for pro‐
viding double the output power. Only the signal from
input CHA is amplified, speakers are only connected to
the accordingly labelled output. Use volume control
CHA to adjust the volume.
On each output of the amplifier, the overall impedance resulting from the individual impe‐
dances of the connected speakers must not fall below the minimum allowable impedance of
the amp's output. If you want to connect multiple speakers to one amplifier output, note the
following:
n
when connecting speakers in series, the impedances add up.
Available operating modes
Installation and starting up
GPA-400
15
Stereo Guitar Power Amp
