No major sonic difference from Gen 2. Second owner, selling my Emotiva XPA-5 Amp. Unit is Gen 1 (I think it's 8 years old), purchased by original owner from Emotiva new. $699 OBO. I also have the UPA-200 for sale and am selling both and will then consolidate with an XPA-11. Both are kept in a smoke/pet/kid-free private screening room only ever used for film playback. Used to power Martin Logans and sounds great. Amp is 200wpc @ 8ohm and 350wpc @ 4ohm. Unit is in great condition. I will pay PayPal fees, buyer pays actual shipping cost. Prefer local buyer near the Philadelphia area to avoid UPS but if you like please keep in mind that shipping weight is 85 lbs. Ships UPS Ground Insured in original shipping boxes. Sale includes amp and standard cord. Any questions please ask. Thanks for looking.