Our references

	Stereophile/Herb Reichert - October 6, 2021 Gramophone Dreams #53: RAAL-requisite HSA-1b headphone/loudspeaker amplifier
	Audiophile Style/Rajiv Arora - September 13, 2021 Part 2: SR1a Monitor & HSA-1b Amplifier
	Audiophile Style/Rajiv Arora - September 3, 2021 Part 1: SR1a Monitor & HSA-1b Amplifier
	Musicalhead/Fidelio - June 8, 2021 Test RAAL-requisite HSA-1b
	Headphone.guru/Peter Pialis - February 15, 2021 HSA-1b Review "The Pinnacle Of Personal Audio"
	Headphones.com/Ian Dunmore - January 21, 2021 HSA-1b Switch Drive Amplifier Review