Home Audio

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.

D/A Converters (DAC)

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Part Number Document Ch # Res. S/N THD+N * Max
 fs *
DSD
Input *
Sound
Color *
Power
Consump.
Notes
      bit dB dB kHz MHz   mW  
AK4499EQ   4 32 134 (140 *) -124 768 22.4 6 types 667 VERITA
AK4498EQ
AK4191EQ
  2
2
-
64
128 (131 *)
153
-116
-153
-
1536
-
45.2
-
7 types
331
26
Analog only
Digital only
AK4497EQ Datasheet 2 32 128 (131 *) -116 768 22.4 6 types 346  
AK4493EQ
  2 32 123 (126 *) -113 768 22.4 6 types 203  
AK4490EQ Datasheet 2 32 120 (123 *) -112 768 11.2 5 types 145  
AK4462VN Datasheet 2 32 117 -107 768 22.4
6 types 70  
AK4468VN Datasheet 8 32 117 -107 768 22.4
6 types 245  
AK4452VN Datasheet 2 32 115 -107 768 11.2 5 types 50  
AK4454VN Datasheet 4 32 115 -107 768 11.2 5 types 97  
AK4456VN Datasheet 6 32 115 -107 768 11.2 5 types 140  
AK4458VN Datasheet 8 32 115 -107 768 11.2 5 types 181  

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

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

[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.