I didn't find much on the Internet about that amplifier, but from what I found, it's mono.
You can't bridge a mono amplifier.
...Except some amplifiers are built as bridge amps (two opposing "hot" signals to the speaker with no ground to the speaker). You CAN have a stereo amp with two permanently bridged outputs. Or, some 4-channel amps can be bridged to make a stereo amp.
If it's a stereo amp, I wouldn't bother unless it has a "bridge" switch built-in (to flip the polarity of one channel). Or, if it has balanced inputs it would be relatively easy to solder-up a polarity-inverting adapter. But... I probably still wouldn't do it.
And you need to check the owners manual to make sure the impedance of your speakers are compatible with bridged mode. The minimum impedance is doubled when bridged. If the amp is rated for 4-Ohms in regular stereo mode, you can't have less than 8-Ohms when bridged.