DISCLAIMER
I bought the KA13 at a discounted price from Fiio. It can be gotten here:
https://www.aliexpress.us/item/3256805865925636.html (no affiliate links).
SPECIFICATIONS/COMPATIBILITY
- DAC chip: dual CS43131
- Op-amp: dual SGM8262
- Dimensions: 56.3 x 22 x 10.5 mm
- Weight: 18.5 g
- Supported audio formats: up to 384kHz/32bit, DSD256
- USB connector: Type-C USB 2.0
- Ports: 3.5 mm (single-ended), 4.4 mm (balanced), 3.5 mm coaxial out
- Output power (single-ended): L+R ≥170 mW +170 mW (32 Ω/THD+N<1%)
- Output power (balanced): L+R ≥ 550 mW + 550 mW (32 Ω/THD+N<1%)
- SNR (single-ended): ≥123 dB (32 Ω/A-weighted)
- SNR (balanced): ≥ 122 dB (32 Ω/A-weighted)
- Noise floor: PO<1.7μV (A-weighted); BAL<3.1 μV (A-weighted)
- Output impedance (single-ended): <1.7 Ω (32 Ω load)
- Output impedance (balanced): <1.8 Ω (32 Ω load)
- THD+N (single-ended): <0.0005% (32 Ω)
- THD+N (balanced): <0.0005% (32 Ω)
- Tested at $75.99 USD
The KA13 supports various file types and sampling rates:
PCM: 384kHz/32bit
DSD DoP: 64/128
DSD Native: 64/124/256
Coaxial: 384kHz/32bit
It is also compatible with the Fiio Control app (on Android devices), where one can play around with settings such as digital filters, change lighting options and SPDIF outputs. On Windows 10 and above, the KA13 is plug-and-play, with no need for installation of additional drivers.
ACCESSORIES
Other than the KA13 dongle, these are included:
- 1 x USB-A to USB-C cable
- 1 x USB-C to USB-C cable
- 1 x lightning to USB-C cable
The accessories are pretty generous. Many dongles do not include lightning adapters, so our Apple users out there will be chuffed to note that Fiio has included one here. Basically other than legacy phones that use micro-USB ports, most other Android and Apple phones and laptops should be covered in terms of compatibility.
For folks who want to get a leather case for the KA13, this is sold separately by Fiio at $4.99 USD here:
https://www.aliexpress.us/item/3256805892786925.html
DESIGN/FUNCTION
Fashioned from CNC metal, the KA13 comes in a sleek rectangular body. Consumers can opt between a silver or black hued variant during ordering.
The design is quite futuristic looking, with a large "X" carved onto the chassis.
This DAC/Amp is sturdy and robust, no complaints from a build point of view. Measuring 56.3 x 22 x 10.5 mm
and weighing in at 18.5 g, it is small and extremely portable.
There is a anti-scratch glass panel on the top of the dongle, where one can see an LED light, which changes colours depending on the file format/bit rate:
- Blue: 48 kHz and below
- Yellow: Above 48 kHz
- Green: DSD
On one end of the fuselage, we have the 3.5 mm (single-ended) and 4.4 mm (balanced) ports. The 3.5 mm port also functions as a 3.5 mm coaxial out.
On the opposite end, we have the USB-C port for powering this baby.
On the side, we have the volume controller, which also functions as a skip track button if held longer. Once a firmware update is applied, the KA13 boasts of an
independent volume controller, something that even higher-end dongles like the Questyle M15 do not have. The volume steps are quite fine, unlike some other dongles that have too wide steps.
Also on this side panel, is the KA13's secret sauce - the desktop mode ("D. mode") button - which we will talk about in the following section.
SOUND/PERFORMANCE
I tested the KA13 with a few Android phones and on Windows laptops and PCs. Apologies, as I am not an Apple user, I can't vouch for their performance with Apple devices.
This dongle is quite
neutralish; it doesn't overly colour the frequency response and lets the connected transducer do the colouring. There is good sub-bass and upper treble extension.
Timbre is quite natural without being overly sterile, though note weight is a tinge on the thinner side; one can play with the filters on the Fiio app to perhaps adjust this area to your liking.
The KA13 is quite
technical for a sub-$100 dongle - acceptable micro-detailing, accurate imaging and superb instrument separation greets the listener. Soundstage is about average in depth but is above average in width, and nothing sounds congested or compressed, even on complex tracks with competing riffs.
This DAC/Amp has 3.5 mm (single-ended) and 3.5 mm coaxial out, with a 4.4 mm balanced port if more power is desired. Indeed, on the desktop mode, this dongle can output a whopping
550 mW!! That's even more than some DAPs can provide, and it handily beats most other dongle competitors in this area! Understandably, the massive power may be an overkill for regular IEMs, so no biggie toggling off the desktop mode unless you have low sensitivity +/- high impedance transducers to drive.
My usual acid tests for sources include 3 of my hardest to drive gear:
1) Final Audio E5000 (low sensitivity at 93dB/mW)
2) Sennheiser HD650 (high impedance at 300ohm)
3) Yinman 600 ohm (600 ohm impedance and 87db/mW sensitivity)
I'm glad to report that on desktop mode, the KA13 drives these 3 behemoths well, without needing to crank up the voume. When underpowered, these transducers will sound bloated and one-noted in the bass, with a lack of dynamics. The KA13 powers these tough customers quite well, almost equivalent to some desktop amps. Most portable sources cannot drive the Yinman 600 ohm properly, so kudos to Fiio for creating so much power inside a little device. A literal Mighty Mouse!
This dongle
doesn't hiss even with fussy high sensitivity IEMs, but it has an
output impedance of 1.7 ohms on single-ended and 1.8 ohm on the balanced port. Hence, the KA13 may not be be the best pairing with fastidious low impedance IEMs such as the infamous Andromeda (based on the rule of eights), as the frequency response might be skewed with IEMs that have an impedance of < 13ish ohms.
POWER CONSUMPTION
We can't go against physics, and with big power on offer, there is unfortunately going to be some form of battery drain. These are the advertised specs for power consumption, which is a bit more than regular dongles:
- 140 mA (standby)
- 150 mA (PO/40 mV)
- 150 mA (BAL/40 mV)
Bear in mind once again, that the 550 mW output of the KA13 is one of the best in the market for a budget dongle, and this nifty device can give more expensive and larger sources a run for their money in terms of sheer power output.
It behooves the user to probably keep to the regular mode on-the-go or with a phone, or if one is just using run-of-the-mill IEMs; users can reserve the desktop mode for PCs/laptops where there is a power supply on hand, and you need to drive demanding transducers. You should also not leave the dongle on standby mode as there is still power draw even if no music is played through it.
During usage, especially on desktop mode, the KA13 does get slightly warm, but not scalding (unlike some other power hungry dongles).
COMPARISONS
Comparisons were made with some other dongles residing in the $50 - 100 USD range.
Truthear Shio
The Shio's engine is a dual Cirrus Logic CS43198 chip. This dongle is warmer in tuning, with a more pronounced mid-bass, and some treble roll-off. It has a thicker note weight too.
The Shio is a league behind in technicalities, with inferior soundstage, imaging, edge definition, micro-details and instrument separation. It has less power on tap too.
E1DA 9038D
The E1DA dongle houses an ESS Sabre ES9038Q2M chip. It is dead neutral and more sterile in note weight. The E1DA is a bit harsher and more sibilant in the treble.
The E1DA has quite a lot on power on tap for a single-ended source (200 mW @ 40ohm), though it pales in comparison to the desktop mode of the KA13. The E1DA also gets noticeably much hotter than the KA13 during usage.
The E1DA unfortunately does not have a volume controller, and comes only with a 3.5 mm port. There is a firmware mod to modify the sound, in addition to giving it a tube-like sound variant.
Both dongles are similar in technicalities, though the E1DA is a tinge smaller in soundstage width.
Colorfly CDA M1
The CDA M1 utilizes a customized ESS DAC chip, the Colorfly α. It is also a neutralish dongle, with 3.5 mm and 4.4 mm outputs. Likewise, it has independent volume controls that are quite fine-tuned.
The M1 does not have as much power (hitting 200 mW @ 32Ω on balanced), but it has slightly better instrument separation and micro-detailing. Soundstage is a hair better on the KA13.
CONCLUSIONS
The KA13 is not just a vapid weekly dongle release for regular IEMs and easy to drive transducers. On desktop mode, it is transformed to a
Mighty Mouse that can trump some pricier and larger sources in terms of absolute power.
Indeed, at the point of writing, the KA13 is a benchmark for the sheer amount of power it brings to the table, and in such a compact Lilliputian form! I am pleased to have finally found a portable source that does justice to demanding gear like the Final E5000, Sennheiser HD650, and the notorious Yinman 600 ohm.
The KA13 has solid build and is very portable, with generous accessories and a fine-tuned independent volume controller. Technical chops are nothing to be sniffed at, and it is quite neutralish, so as to let the connected transducer do the imbuement. I do not note any hiss with high sensitivity suspects, though the highish output impedance on both ports is perhaps not the best synergy with some finicky IEMs.
The huge power on tap will definitely contribute to some battery drain on phones, but this can be mitigated somewhat by toggling off the desktop mode when using the KA13 with regular IEMs, and only utilizing the desktop mode once there is a charging source nearby.
The KA13 is one of the outstanding budget dongles I have had the chance to listen to in my audio journey, and it wholeheartedly gets my recommendation, the exception perhaps being audiophiles using some outlier low impedance transducers like the Andromeda.