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All in the name of ultimate Real Live Sound

Leading a new era of High-resolution audio

The new circuitry found in VELVET SOUND devices is designed to maximize dynamics and ensure pure, unaltered audio data, prioritizing the accurate capture and reproduction of the source material in order to achieve high performance and rich musicality. These devices were designed specifically for the high-resolution digital audio era.

FEATURED PRODUCTS

VERITA AK4499EQ

Flagship Premium D/A Converter

AKM’s VERITA audio devices target high-end and boutique audio equipment. These devices integrate cutting-edge features ideal for the Hi-Fi and high-resolution audio markets.
VERITA AK4499EQ

The AK4499EQ current-output DAC is AKM’s latest VELVET SOUND VERITA product, following on from the previous flagship device, the AK4497EQ.

Current-output DAC Achieves Best-in-Class Performance

AKM’s Low-Distortion Technology has been optimized for the AK4499’s current-output architecture, resulting in a THD+N measurement of -124dB. The AK4499EQ achieves SNR of 140dB in mono mode.

Dynamic High-Resolution Playback with Incredible Detail

The AK4499EQ is produced using the same Premium Audio LSI process and Non-Magnetic Packaging technology originally developed for the AK4497EQ. These techniques dramatically improve noise performance, especially in the traditionally problematic lower frequency range.

Key Features

  • Maximum Sampling Frequency, Bit rate : PCM 768kHz/32-bit, DSD 22.4MHz
  • SNR : 134dB (Mono mode: 140dB)
  • THD+N : -124dB
  • Sound Color Digital Filter : 6 types

D/A Converters (DAC)

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Premium D/A Converters

Part Number Document Ch # Res. S/N THD+N * Max
 fs *
DSD
Input *
Sound
Color *
Power
Consump.
Vdd Package Notes
      bit dB dB kHz MHz   mW V    
AK4499EQ   4 32 134 (140 *) -124 768 22.4 6 types 667 5.0/3.3 or 1.8
HTQFP-128 VERITA
AK4497EQ Datasheet 2 32 128 (131 *) -116 768 22.4 6 types 346 5.0/3.3 or 1.8
TQFP-64  
AK4493EQ
  2 32 123 (126 *) -113 768 22.4 6 types 203 5.0/3.3 or 1.8
LQFP-48  
AK4490EQ Datasheet 2 32 120 (123 *) -112 768 11.2 5 types 145 5.0 LQFP-48  
AK4452VN Datasheet 2 32 115/111 -107/-95 768 11.2 5 types 50 5.0/3.3 QFN-32  
AK4454VN Datasheet 4 32 115/111 -107/-95 768 11.2 5 types 97 5.0/3.3 QFN-32  
AK4456VN Datasheet 6 32 115/111 -107/-95 768 11.2 5 types 140 5.0/3.3 QFN-48  
AK4458VN Datasheet 8 32 115/111 -107/-95 768 11.2 5 types 181 5.0/3.3 QFN-48  
AK4468VN Datasheet 8 32 117/113 -107/-100 768 22.4
5 types 245
5.0/3.3 QFN-48  

[Notes]

* S/N (Mono mode)
* THD+N: Total Harmonic Distortion plus Noise
* Max fs: Maximum Sampling Frequency
* DSD: Direct Stream Digital
* Sound Color: AKM original digital filter

* Schedules of Samples and Production are subject to be changed without notice.
* The information in the datasheet is subject to be changed without notice.

A/D Converters (ADC)

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Premium A/D Converters

Part Number Document Ch # Res. S/N THD+N * Max fs * DSD
Input *
Sound
Color *
Power
Consump.
Vdd Package Notes
      bit dB dB kHz MHz   mW V    
AK5397EQ Datasheet 2 32 127 (130 *) -108 768 3 types 455 5.0/3.3 LQFP-44  
AK5572EN Datasheet 2 32 121 (124 *) -112 768 11.2 4 types 148 5.0 QFN-48 VERITA
AK5574EN Datasheet 4 32 121 (127 *) -112 768 11.2 4 types 275 5.0 QFN-48 VERITA
AK5576EN Datasheet 6 32 121 (128 *) -112 768 11.2 4 types 411 5.0 QFN-64 VERITA
AK5578EN Datasheet 8 32 121 (130 *) -112 768 11.2 4 types 536 5.0 QFN-64 VERITA
AK5552VN Datasheet 2 32 115 (118 *) -106 768 11.2 4 types 83 5.0 QFN-48  
AK5554VN Datasheet 4 32 115 (121 *) -106 768 11.2 4 types 140 5.0 QFN-48  
AK5556VN Datasheet 6 32 115 (122 *) -106 768 11.2 4 types 206 5.0 QFN-64  
AK5558VN Datasheet 8 32 115 (124 *) -106 768 11.2 4 types 261 5.0 QFN-64  

[Notes]

* THD+N: Total Harmonic Distortion plus Noise
* Max fs: Maximum Sampling Frequency
* DSD: Direct Stream Digital
* Sound Color: AKM original digital filter

* Schedules of Samples and Production are subject to be changed without notice.
* The information in the datasheet is subject to be changed without notice.

Sample Rate Converters (SRC)

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Premium SRCs

Part Number Document SRC 
Ch #
Res. DR * THD
+N *
Input fs*
(FSI)
Output fs*
(FSO)
Sound
 Color *
Vdd Package Others Notes
      bit dB dB kHz KHz   V      
AK4137EQ Datasheet 2 32 186 -150 8 to 768 8 to 768 4 types 3.3/1.8 LQFP-48 PCM/DSD converter VERITA
AK4136VQ Datasheet 2 32 176 -140 8 to 384 8 to 384 4 types 3.3/1.8 LQFP-48
   

[Notes]

* DR : Dynamic Range
* THD+N: Total Harmonic Distortion plus Noise
* DSD: Direct Stream Digital
* Sound Color: AKM original digital filter

* Schedules of Samples and Production are subject to be changed without notice.
* The information in the datasheet is subject to be changed without notice.