ZERO:RED

Tonal Profile

Dual dynamic, 10 mm plus 7.8 mm, tuned with Crinacle. The least efficient of the Truthear line on paper — 117.5 dB/V is roughly 4 dB below GATE — which for once means a phone will not be sitting at three clicks off zero.

Amplification Warning

The box includes a 10 Ω impedance adapter. That is the manufacturer telling you, without saying it, that the earphone is sensitive enough for source hiss to be a real problem — the adapter attenuates and raises the load the source sees. Using it changes the frequency response too, since the dividing network is the earphone's own impedance curve.