FiiO
FiiO K13 R2R Desktop DAC & Headphone Amp
Best For: R2R desktop flexibility
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A desktop resistor-ladder DAC and headphone amp with Bluetooth, NOS/OS modes and parametric EQ.
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Product Overview
The K13 R2R is for buyers who specifically want an R2R design with flexible desktop inputs. NOS and OS modes let you choose the decoding approach; they do not establish that it will sound better with every headphone. Its XLR and RCA outputs connect to powered speakers or a separate amplifier. Choose a simpler DAC if you will not use these extra features.
Key Features
- DAC: FiiO four-channel 24-bit R2R
- Inputs: USB-C, optical, coaxial, Bluetooth
- Headphone outputs: 6.35mm single-ended; 4.4mm balanced
Technical Specifications
| Type | Desktop DAC / headphone amp |
| DAC | FiiO four-channel 24-bit R2R |
| Inputs | USB-C, optical, coaxial, Bluetooth |
| Headphone outputs | 6.35mm single-ended; 4.4mm balanced |
| Line outputs | RCA; balanced XLR |
| Bluetooth | Yes, LDAC supported |
| Power supply | AC mains or suitable 12V DC supply |
| Sound controls | NOS/OS modes; 10-band parametric EQ |
Research Sources
Selected from published specifications; not a hands-on review.
Pros
- R2R conversion with selectable NOS/OS modes
- Bluetooth and balanced line outputs
Cons
- Higher entry cost than a basic desktop DAC
- No battery or headset microphone input
Price & Availability Disclaimer: Catalog source last checked on September 5, 2026. Confirm the exact model and specifications with the manufacturer. Retailer prices and stock levels can change. The price, availability, shipping terms, taxes, returns, and warranty terms shown by the external retailer at the time of purchase will govern the sale.