RH-2500
headphones
$80
Used market: $60*
Specifications
3 of 7 values have a recorded sourceExpert Audio Engineering Commentary
Tonal Profile
Closed 40 mm monitoring headphones for the booth, successor to the RH-2400. The published sensitivity sits far above the rest of the category and is flagged in the spec-claims section below; whichever scale it belongs to, the practical answer is the same — anything drives these loudly.
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.
«Sensitivity: 118 dB +/-3 dB at 1 kHz (1 mW)»
Read as printed, this says 118 dB of sound pressure from one milliwatt into 32 Ohms — roughly 15 to 20 dB above every other 32-Ohm dynamic headphone in this catalogue, which cluster between 95 and 103 dB/mW. The arithmetic is worth stating: at 32 Ohms the volt scale and the milliwatt scale differ by 10·lg(1000/32) = 14.9 dB, so 118 dB per milliwatt is numerically what 103 dB per milliwatt becomes when expressed per volt. Reloop's other sheets in this catalogue (RHP-20, RHP-15, RHP-5) all name the milliwatt reference and all fall in the normal range. The +/-3 dB tolerance is also unusual on a sensitivity line. We state only what the document says; the reader draws the conclusion.
checked 8/5/2026* Estimated with the depreciation fallback (~75% retained value). · checked on 8/5/2026