GZLOZONE AK4497EQ DAC Board / Kit Official Standard Balanced Line I2S/DSD Decoder

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Brand Name
GZLOZONE
Maximum Power Per Channel
10W
Model Number
AK4497EQ
Channels
2 (2.0)
Package
Yes




AK4497EQ Official Standard Balanced Line Decoder! Support pure DSD decoding! . . . . .   



AK4497 PCB size: 10 * 10cm

Balanced to single-ended  board size: 4.8x4.8cm

works voltage: 

 Analog power supply DC+/-15V ( note: must be DC, can not connect AC)

 Digital power supply AC single 9-12V  ( this voltage can be AC)

The balanced-to-single-ended converter board power supply is output from the 4497 Pout


. . . Listening! . . AK4497 compared to AKM previous generation 4495 sound enhancement significantly (the official standard balanced line + balance to single-ended conversion board test). Sound more clear; better resolution; high-frequency more clearly not in the slightest; sound background is quieter; IF density, Naiting; listen to the human voice is more real, like singers in the live concert; sound layering better; Control is better, just right retractable; three very balanced! Is a rare good decoding!


 This version supports I2S / DSD decoding 

Pure soft control (onboard MCU)! Independent design using I2S / DSD signal input!

I2S maximum support 32bit data 768KHz sampling rate! Note: I2S requires I2S format (Philips format) data, does not support left-aligned or right-justified format (right-aligned is Sony format). Support DSD decoding (native support DSD decoding! Not  DSD to PCM! Please do not be misled!), Support 2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz DSD sampling rate!

AK4497 board with mute function, with the Italian interface can be achieved without noise for the DSD!


Support soft control volume (VOL port 10K single potentiometer to achieve, the default is not connected the potentiometer with short-circuit cap for the maximum volume)!

4497 board  Each channel a dual op amp OPA1612 sound very good! Balance to single-end board with 5534, are designed to use the original AKM op amp, to ensure the effect!


Detailed features:

1: the digital filter settings
 total  8 kinds through the  K1 K2 K3 set as shown below:


 1-5.jpg


2: DSD sample rate setting

Four sampling rates corresponding to DSD64 DSD128 DSD256 DSD512 through  K4 K5 settings as shown below

 1-6.jpg


3: DSD filter settings

Setting via (K6):

K6 Set the cutoff frequency of the DSD filter: Low frequency is cut off, High frequency is shorted (K6 should be disconnected if shorted in DSD mode or noise may occur)

4:
Gain setting

Setting via (K7):

K7 Set the gain: Disconnect is 2.8Vpp, Short is 3.75Vpp (K7 in the DSD mode when shorted please disconnect K6 Otherwise it may cause noise)

PS: In the DSD mode, K6 and K7 can not be shorted at the same time. Otherwise, the noise may occur. There is no effect in PCM mode.

5:
DSD / PCM mode setting

With the K8 setting:

K8 short for the PCM mode, not connect is the DSD mode! It is also possible to set the DSD / PCM via pin 1 of the I2S interface. The I2S interface inputs low level to PCM mode and the I2S interface inputs high level to the DSD mode.

PS: When using I2S interface 1 foot switch PCM / DSD should be K port 8 disconnected, in the use of K8 switch PCM / DSD I2S interface 1 foot should be disconnected, otherwise it may lead to external signal source damage! . .


6:
Mute settings

MUTE: MUTE pin will play normally when it is low level, mute when it is high level.

MUTE foot access to the Italian interface, the output signal can be quietly DSD mode for the song without noise! (Other devices have not tested this feature for the time being)


I2S interface definition:

1 DSDON; 2 GND; 3 DATA / DSD; 4 BCK / DCLK; 5 MCLK; 6 LRCK / DSDR



Board analog part of the official evaluation version IV LPF circuit. as follows. . .



 1-7.jpg





package inlucde:      Assembeld AK4497EQ DAC board   X 1

                                Balanced to single-ended conversion board X1

Shipping CompanyShipping CostEstimated Delivery Time
DHL3 - 7 days
UPS Expedited3 - 7 days
EMS5 - 14 days
Post Air MailFree Shipping15 - 45 days
Return PolicyIf the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller ServiceOn-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).