I'm looking at getting into headphone amps and the Archel2 looks great. I currently use a Sennheiser GSX 1000 DAC/amp with Drop+Sennheiser HD 58X Jubilee cans.
Would there be any point using the Archel2 after the GSX 1000 (i.e double amped) given that the 58X are 150ohm and are already "loud...