iFi ZEN CAN Signature HFM & ZEN DAC Signature V2: Review

Does the iFi ZEN CAN Signature HFM & ZEN DAC Signature V2 combination make sense for a wide variety of headphones or just HiFiMAN models?

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iFi ZEN CAN Signature HFM & ZEN DAC Signature V2: Review

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iFi Zen DAC Signature V2 HiFi Desktop DAC (Digital Analog Converter) with USB3.0 B Input/Outputs 4.4mm Balanced/RCA : Electronics