FIIO K9 AKM DAC AK4499EX Headphone Amplifier

FIIO K9 AKM AK4499EX Amplificateur Casque 2x THX-AAA 788+ Bluetooth aptX-HD LDAC 32bit 384kHz DSD256 MQA
FiiO offers us the evolution of their K9 model. The K9 AKM is a versatile DAC model integrating analog and digital inputs, and can be used in USB DAC mode. This model features a latest-generation AKM DAC coupled with its Delta-Sigma modulator, enabling music playback at resolutions of up to 32 bits / 768kHz and DSD512 file decoding. These two THX amplifiers, meanwhile, can deliver up to 2000 mW at 32 ohms for efficient powering of any headphones or earphones, thanks to balanced and unbalanced outputs.

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529,00 €tax incl.

440,83 € tax excl.
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Shipping date: 25-04-2024.

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FIIO K9 AKM AK4499EX Headphone Amplifier 2x THX-AAA 788+ Bluetooth aptX-HD LDAC 32bit 768kHz DSD512 MQA

FIIO K9 AKM : Front view

FIIO K9 AKM in a nutshell

FiiO offers us the evolution of their K9 model. The K9 AKM is a versatile DAC model integrating analog and digital inputs, and can be used in USB DAC mode. This model features a latest-generation AKM DAC coupled with its Delta-Sigma modulator, enabling music playback at resolutions of up to 32 bits / 768kHz and DSD512 file decoding. These two THX amplifiers, meanwhile, can deliver up to 2000 mW at 32 ohms for efficient powering of any headphones or earphones, thanks to balanced and unbalanced outputs.

FIIO K9 AKM : A 32 bits / 768 kHz et DSD512 DAC

Highly versatile, the Fiio K9 AKM headphone amplifier / DAC adapts to any type of input, analog or digital, and can be easily connected to all your sources. USB-B and asynchronous USB-C ports are available for processing Windows and Mac sources. These are linked to a high-precision XMOS XUF208 controller, guaranteeing optimum playback of your files. Conversion, meanwhile, is entrusted to an AK4191 DAC associated with its AK4499EX Delta-Sigma modulator, allowing total separation of digital and analog sections. To ensure correct data addressing and optimal conversion of 32-bit / 768kHz music, a dual 49 and 45 MHz clock has also been integrated.

FIIO K9 AKM: AK4499EX et AK4191EQ
FIIO K9 AKM: power supply

FIIO K9 AKM : THX AAA amplification

At the DAC's output, Fiio's K9 AKM integrates two THX AAA 788+ amplifier modules. These combine the best of both worlds, offering amplification power and sound close to the best Class A amplifiers, while consuming as much power as Class D amplifiers. THX AAA technology ensures perfectly accurate reproduction with zero noise. The incredibly low harmonic distortion (THD) of 0.00027% and a frequency response ranging from 20Hz to 50kHz make it indispensable for appreciating all the details of a High Definition recording. The Fiio K9 AKM amp / DAC is therefore naturally Hi-Res Audio certified.

FIIO K9 AKM : High output power

On the output side, the Fiio K9 AKM offers an single-ended 6.35mm headphone output and two balanced outputs, one 4.4mm jack and one XLR. The unbalanced output is rated at 1500mW at 32 Ohm, while the balanced outputs are rated at 2000mW at 32 Ohm. Thanks to its design, Fiio's headphone amplifier can power any type of headphone or pair of headphones, even high-impedance ones. Furthermore, to guarantee perfect compatibility, you'll find three gain settings on the front of the K9 AKM.

FIIO K9 AKM : A versatile DAC

In addition to its USB ports, the K9 AKM offers two digital inputs (one optical and one coaxial), and a 4.4mm jack input. This makes it possible to connect a wide range of sources, such as CD players, network players and TV sets. It can therefore be easily integrated into any Hifi system, where it will act as a USB DAC and Audio DAC. Furthermore, thanks to its Bluetooth 5.1 receiver, Fiio audio's K9 AKM can handle music from a smartphone, tablet or computer. On the codec front, support of SBC and AAC guarantees compatibility with all sources, while the aptX HD and LDAC codecs ensure high listening quality. Finally, the aptX Low Latency and aptX Adaptive codecs are also on board to avoid any sound/image mismatch if you want to broadcast audio from a video.

FIIO K9 AKM : Simplicity of use

Finally, Fiio's K9 AKM is not only easy to control from its physical front panel interface, but can also be remotely controlled via the Fiio mobile app. While you can adjust the volume, gain level, source and front-panel output connectors, you can set many other parameters and create your own equalization curves to adjust sound reproduction to your preferences.

Technical characteristics

Specifications
Product typeDAC
Amplifier
Preamplifier
DAC ChipAK4191 + AK4499EX
InputsBluetooth
1x USB-B
1x USB-C
1x RCA stéréo asymétrique
1x Jack 4.4mm symétrique
1x Fibre optique
1x Coaxial
Outputs1x RCA stéréo asymétrique
1x Jack 6.35mm asymétrique
1x jack 4.44mm symétrique
1x XLR3 stéréo symétrique
1x XLR4 sysmétrique
USB InterfaceXMOS XUF208
Bluetooth chipQCC5124
Low Pass Filter2x OPA1612
Volume controller2x NJU72315
Amplification chip2x THX AAA788+
Channels balanceL12~R12 (0.5dB par niveau)
GainL (Low)
M (Medium)
H (High)
FiiO ControlSupported
Supported Bluetooth codecsAAC, SBC, aptX, LDAC, aptX HD, aptX LL, aptX Adaptive
Bluetooth codecs indicatorsSBC : Blue
AAC : Cyan
aptX HD : Yellow
aptX : Purple
aptX LL : Purple
LDAC : White
aptX Adaptive : Green
Supported sampling rates768k 32bit / DSD512
Recommended headphone impedance8~350Ω
SINGLE-ENDED LINE OUTPUT PERFORMANCES
Total harmonic distortion (THD)<0.00027% (1kHz/-0.7dB@10kΩ)
Signal-to-noise ratio (SNR)≥119dB (dBA)
Crosstalk≥112dB (1kHz@10kΩ)
Bottom noise<2.9μV (dBA)
Frequency response20Hz~50kHz(-3.5dB)
Line Output Level2.3Vrms (1kHz@10kΩ)
BALANCED LINE OUTPUT PERFORMANCES
Total harmonic distortion (THD)<0.00020% (1kHz/-1dB@10kΩ)
Signal-to-noise ratio (SNR)≥128dB (dBA)
Crosstalk≥122dB (1kHz@10kΩ)
Bottom noise<1.9μV (dBA)
Frequency response20Hz~50kHz(-3.5dB)
Line Output Level4.7Vrms (1kHz@10kΩ)
SINGLE-ENDED HEADPHONE OUTPUT PERFORMANCES (JACK 6.35MM)
Output power1000mW 16Ω, THD+N<1%
1500mW 32Ω, THD+N<1%
200mW 300Ω, THD+N<1%
Output impedance<1Ω (32Ω)
Crosstalk≥76dB (1kHz@32Ω)
Total harmonic distortion (THD)<0.00026% (1kHz/-1.3dB@32Ω)
Bottom noise<3.0μV (dBA)
Signal-to-noise ratio (SNR)≥127dB (dBA)
Frequency response20Hz~50kHz(-3.5dB)
Max output voltage>21Vp-p
PERFORMANCES SORTIE CASQUE SYMÉTRIQUE (JACK 4.4MM, XLR4)
Output power1000mW 16Ω, THD+N<1%
2000mW 32Ω, THD+N<1%
780mW 300Ω, THD+N<1%
Output impedance<1Ω (32Ω)
Crosstalk≥116dB (1kHz@32Ω)
Total harmonic distortion (THD)<0.00029% (1kHz/-9.5dB@32Ω)
Bottom noise<5.2μV (dBA)
Signal-to-noise ratio (SNR)≥124dB (dBA)
Frequency response20Hz~50kHz(-3.5dB)
Max output voltage>42Vp-p
General
Supply voltageAC 100-120V / AC 220-240V
Dimensions200x 224.5x 72mm
Net weight2.65 kg
Case materialAluminum
ColorNoir
 
Data sheet
InputRCA
InputBluetooth
InputJack 4.4mm
InputUSB
InputSPDIF
InputOptical Fiber
OutputJack 6.35mm
OutputXLR
OutputJack 4.4mm
OutputRCA
DAC / ADC ChipAK4499EX
Max sampling rate768kHz
ColorBlack
ClassClass D / T
NetworkingNo
Remote ControlNo
 
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FIIO K9 AKM DAC AK4499EX Headphone Amplifier 2x THX-AAA 788+ Bluetooth aptX-HD LDAC 32bit 768kHz DSD512 MQA
FiiO offers us the evolution of their K9 model. The K9 AKM is a versatile DAC model integrating analog and digital inputs, and can be used in USB...

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