Emotiva XPA-1 Gen 2 Monoblock Power Amplifier Review Chris Heinonen and David RichOctober 20, 2014 The Emotiva XPA-1 Gen 2 is an update to Emotiva's XPA-1 500 watt monoblock amplifier. Improvements include more power (600 watts RMS into 8 ohms), and 60 watts of Class A bias. Power Amplifiers