Why would anyone want to lower the LO voltage on a 340 if the max voltage is only 2Vrms in Bal LO and only 1Vrms in single ended LO? Just keep the 340 at max LO voltage, and hope you don’t need a higher LO voltage to your amps (like 4 Vrms)………unless you want to connect 12v DC to your 340, switch to super gain, and increase max LO voltage that way (because by your hearing observations, max LO voltage is increased above iBasso’s current spec sheet with the Amp15 card in super gain).340 pairs with many Amps with amazing quality, despite the amp15 is a preamp LO
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