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391Audio GD SA-31 head amp/ preamp . A powerfull Head Amp with Diamond Difference design .
87TEAC HA-501 Headphone Amp
32Head Fi's Favourite Amp for the Audeze LCD 2: $200-$1000 [POLL]
5Amps with SWITCH between line-out and headphones?
2Audio-gd SA-31, Project Sunrise 2 or Lake People G109S for HE-500 and HD600?