The KA15 fits into 52 x 25 x 11 mm for 21 grams, in a metal body milled, then anodised and polished. An LCD shows the sampling rate in use, and the USB-C cable detaches. A lanyard hole lets you attach a cord.
Conversion relies on two Cirrus Logic CS43198, one per channel. The 3.5 mm output delivers 290 mW into 16 ohms and 180 mW into 32 ohms; the balanced 4.4 mm output rises to 510 then 560 mW into the same loads. Stated signal-to-noise ratios reach 122 and 123 dB into 32 ohms.
The USB-C input accepts up to 768 kHz at 32-bit as well as DSD64, DSD128 and DSD256. The 3.5 mm socket doubles as an SPDIF output, up to 384 kHz. FiiO recommends impedances of 16 to 150 ohms single-ended and 16 to 300 ohms balanced.
A ten-band parametric equaliser works without loss, with import, export and sharing of curves. Volume adjusts in sixty coarse or one hundred and twenty fine steps. A patented desktop mode raises the available power, and the 3.5 mm socket recognises CTIA in-line controls and their microphone.
Data sheet
Specific References
The FiiO FT13 is a closed-back over-ear headphone with amaranth wood ear cups, a 60 mm dynamic driver, and a W-shaped diaphragm, and is Hi-Res Audio certified.
The FiiO FT5 in black are open-back over-ear headphones with a 90 mm planar magnetic driver, supplied with four interchangeable audio plugs.
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