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The V22 INFINIUM is a Class A amplifier. 

Class AB amps are push-pull with the soundwave split in half and each of the two power tubes are driving one half of the soundwave.

However, in Class A, the entire soundwave is being amplified by the power tubes.  

Class A push-pull is just TWO Class A amps, each amplifying the entire soundwave, but one is inverted.  So it is PUSHING electrons through the speaker while the other is PULLING, then they reverse.