Diana TC Signature
headphones
$4,995
Used market: $3,895*
Specifications
3 of 5 values have a recorded sourceExpert Audio Engineering Commentary
Tonal Profile
90 dB/mW at 72 ohms is the voltage-hungry end of the planar world: reaching 110 dB needs roughly 2.7 V, which most dongles can produce and few can sustain into a load that draws real current on peaks.
What the datasheet actually says
Quoted verbatim from the manufacturer’s own page, with the date we checked it. We state what is printed, not what anyone intended by it.
«Impedance: 72 Ω nominal | Recommended amplifier power: 2-8 watts (@50 ohms) | Sensitivity: 90 dB/mW»
The same specification block gives the headphone a nominal impedance of 72 ohms and states the recommended amplifier power at 50 ohms. Power ratings are load-dependent, so a figure quoted into 50 ohms does not describe what this 72-ohm headphone will receive: the same amplifier voltage delivers about 1.4 times less power into 72 ohms than into 50.
checked 8/5/2026* Estimated with the depreciation fallback (~78% retained value). · checked on 8/5/2026