Home Audio

VELVET
SOUND

Spatially Immersive Sound

Home Audio

VELVET
SOUND

Spatially Immersive Sound

Home Audio

VELVET
SOUND

Spatially Immersive Sound

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.

FEATURED PRODUCTS

VERITA AK4499EQ

Flagship D/A Converter

New Product

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

Dynamic High-Resolution Playback with Incredible Detail

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

AK4497EQ

Premium High-end D/A Converter

128dB 768kHz/32-bit 2ch Premium High-end D/A Converter

AK4497EQ

The AK4497 is a premium 32-bit DAC based on AKM’s VELVET SOUND architecture, ideal for high-resolution playback. The AK4497 maximizes the performance of switched-capacitor audio DAC technology. The larger current-drive capability provided by VELVET SOUND design techniques enables greatly enhanced signal-to-noise performance.

Key Features

Maximum Sampling Frequency, Bit rate : PCM 768kHz/32-bit, DSD 22.4MHz
SNR : 128dB (Mono mode: 131dB)
THD+N : -116dB
Sound Color Digital Filter : 6 types

AK4493EQ

Premium High-end D/A Converter

123dB 768kHz/32-bit 2ch Premium High-end D/A Converter

AK4493EQ

An upgrade from 2014’s best-selling AK4490EQ, the AK4493EQ employs AKM’s VELVET SOUND audio design and manufacturing process. As with all VELVET SOUND devices, the AK4493 demonstrates excellent low-frequency noise performance, dynamics, and data integrity, leading to faithful acoustic sound expression.

Dynamic Sound Playback with Maximum Data Content

Even Higher Performance than the AKM’s Best Selling AK4490

Key Features

Maximum Sampling Frequency, Bit rate : PCM 768kHz/32-bit, DSD 22.4MHz
SNR : 123dB (Mono mode: 126dB)
THD+N : -113dB
Sound Color Digital Filter : 6 types

D/A Converters

A/D Converters

Sample-Rate Converters

D/A Converters (DAC)

LINEUP

DAC: Product Portfolio

* Bubble Size = "Sound Quality"

Premium D/A Converters

Part Number	Status	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	ES	4	32	134 (140 *)	-124	768	22.4	6 types	667	5.0/3.3 or 1.8	HTQFP-128	VERITA
AK4497EQ	MP	2	32	128 (131 *)	-116	768	22.4	6 types	346	5.0/3.3 or 1.8	TQFP-64
AK4493EQ	MP	2	32	123 (126 *)	-113	768	22.4	6 types	203	5.0/3.3 or 1.8	LQFP-48
AK4490EQ	MP	2	32	120 (123 *)	-112	768	11.2	5 types	145	5.0	LQFP-48
AK4452VN	MP	2	32	115/111	-107/-95	768	11.2	5 types	50	5.0/3.3	QFN-32
AK4454VN	MP	4	32	115/111	-107/-95	768	11.2	5 types	97	5.0/3.3	QFN-32
AK4456VN	MP	6	32	115/111	-107/-95	768	11.2	5 types	140	5.0/3.3	QFN-48
AK4458VN	MP	8	32	115/111	-107/-95	768	11.2	5 types	181	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)

LINEUP

ADC: Product Portfolio

* Bubble Size = "Sound Quality"

Premium A/D Converters

Part Number	Status	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	MP	2	32	127 (130 *)	-108	768	―	3 types	455	5.0/3.3	LQFP-44
AK5572EN	MP	2	32	121 (124 *)	-112	768	11.2	4 types	148	5.0	QFN-48	VERITA
AK5574EN	MP	4	32	121 (127 *)	-112	768	11.2	4 types	275	5.0	QFN-48	VERITA
AK5576EN	MP	6	32	121 (128 *)	-112	768	11.2	4 types	411	5.0	QFN-64	VERITA
AK5578EN	MP	8	32	121 (130 *)	-112	768	11.2	4 types	536	5.0	QFN-64	VERITA
AK5552VN	MP	2	32	115 (118 *)	-106	768	11.2	4 types	83	5.0	QFN-48
AK5554VN	MP	4	32	115 (121 *)	-106	768	11.2	4 types	140	5.0	QFN-48
AK5556VN	MP	6	32	115 (122 *)	-106	768	11.2	4 types	206	5.0	QFN-64
AK5558VN	MP	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)

LINEUP

SRC: Product Portfolio

* Bubble Size = "Sound Quality"

Premium SRCs

Part Number	Status	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	MP	2	32	186	-150	8 to 768	8 to 768	4 types	3.3/1.8	LQFP-48	PCM/DSD converter	VERITA
AK4136VQ	MP	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.

About VELVET SOUND

VELVET SOUND is a sound philosophy and brand concept for AKM’s next-generation audio devices, featuring new chip architectures and core technologies.

*VELVET SOUND Logo™, Audio 4 Pro™ and Audio 2 Go™ are trademarks of Asahi Kasei Electronics Corporation in Japan, Europe and the United States.

velvetsound.akm.com
by ASAHI KASEI MICRODEVICES

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