Can any stereo amplifier be bridged?
All stereo amplifier channel pairs on Director and Architect amps are capable of being bridged. IMPORTANT NOTE: When bridging channels, do not use a speaker rated at less than 8 ohms. When bridging amplifier channels each channel of the bridged pair “sees” one half of the speaker load.
What happens if you bridge a non bridgeable amp?
Bridging them will work but won't change output voltage - therefore won't change output power. In order to bridge amplifier phase of one channel has to be inverted.