Porta Pro

Tonal Profile

In production unchanged since 1984 and still one of the few consumer headphones whose datasheet names the unit: 101 dB SPL/1mW at 60 Ω. Open, supra-aural, with a folding steel headband and a bass shelf that has outlived every fashion in tuning.

Amplification Warning

60 Ω is high for a portable, and that is deliberate: it makes the Porta Pro tolerant of a bad jack and quiet on a noisy one. 101 dB/mW gives about 113 dB from a volt, so no source in this catalogue struggles — but a phone dongle at half volume is already loud enough to matter for hearing.