DACs — FiiO M33 R2R

The M33 R2R is a portable digital audio player from FiiO, built with a distinctive R2R (resistor-ladder) conversion architecture rather than a conventional delta-sigma chip. The M33 R2R brings FiiO's alternative conversion philosophy to a portable digital audio player format.

Key specs that matter

The conversion type is R2R, a distinctive resistor-ladder architecture some enthusiasts specifically favour for its distinctive tonal character compared with mainstream delta-sigma chip-based designs.

Sound and use context

Expect a distinctive conversion character reflecting the R2R architecture, packed into a portable player format for buyers wanting this alternative conversion philosophy while on the move.

Pairing

As a portable digital audio player, the M33 R2R functions as both a source and headphone amplifier, connecting directly to headphones or via line-out to a separate amplifier.

Alternatives

FiiO's broader portable player catalogue, including conventional delta-sigma models, offers alternatives for buyers wanting to compare R2R against mainstream conversion philosophies.