Loaded pocket rocket – If it were an Italian sportscar, it might be an Alpha-Romeo 4C Spider? As a portable headamp from Italy, it's Audma's Brioso PHPA1. What makes it loaded is packing the company's proprietary crossfeed circuity called Elisa for Electronic Loudspeaker Imaging Simulating Amplifier which builds in adjustable time delay and gain for the counter-phase injection. Those controls including bass compensation sit on elegantly retracting pots. Push on them to spring free, adjust, push in flush. Analog inputs are on 3.5/4.4mm, digital uses USB-C allied to a combo of AKM AK4499EXEQ and AK4191EQ. 32Ω headphone power is 2wpc which doubles into 64Ω and still swings 2.7wpc into 150Ω. Headphone ports are 3.5/4.4mm and voltage gain is switchable in 8dB increments from 0-24dB. The rechargeable 1'600mAh/7.4V battery is claimed to run up to 5 hours. Permanent power comes via dedicated USB-C power inlet. This portable amp measures 8.1 x 1.9 x 13.8cm and weighs 240g.
