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SAEQ Hyperion Ge and RAAL Requisite CA-1a | HFA - The Independent Source for Audio Equipment Reviews (hifi-advice.com)
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Stereophile/Herb Reichert - October 6, 2021
Gramophone Dreams #53: RAAL-requisite HSA-1b headphone/loudspeaker amplifier
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Audiophile Style/Rajiv Arora - September 13, 2021
Part 2: SR1a Monitor & HSA-1b Amplifier
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Audiophile Style/Rajiv Arora - September 3, 2021
Part 1: SR1a Monitor & HSA-1b Amplifier
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Musicalhead/Fidelio - June 8, 2021
Test RAAL-requisite HSA-1b
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Headphone.guru/Peter Pialis - February 15, 2021
HSA-1b Review "The Pinnacle Of Personal Audio"
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Headphones.com/Ian Dunmore - January 21, 2021
HSA-1b Switch Drive Amplifier Review
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