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±28 V supply voltage: 0
many consumer and prosumer sources do not feature differential outputs
The main ±12 V output is provided by a pair of ultra-low noise linear voltage regulators from Texas Instruments
that are popular in DIY audio circles
The THD+N vs frequency plots for 100 W into 8 Ω and 4 Ω
HP-22 Board Option:Unpopulated PCB ±28 V supply voltage: 0Build a high performance headphone amplifier for less than $100! The HP 22 is an all DIY, low distortion headphone amplifier. It provides 200 mW into 300 at vanishingly low distortion and easily drives headphones down to 32 . With its ultra low noise floor, it the HP 22 also lends itself well to driving IEMs. With its ample output power and incredibly low distortion, the HP 22 provides a clean sound with a very realistic sound stage. Technical