R2R 7HE (Regenerative power supply)(2018 version firmware)
(PCM / DXD / DSD Native support,
USB / RJ45 / HDMI inputs include) 

Fully Dedicated Discrete  Real Balanced  R-2R resistor ladders DAC
Built in 4 groups DA-7 R-2R modules
Built in FPGA processor , reject the jitter
DSD , DXD support from USB / RJ45 / HDMI
32bit / 384K Asynchronous Transfer Amanero Combo 384 with USB isolator
Built in OCC , TCXOs and Hi-End parts ,no upgrade options

Some advices for the unit have the life longer than 100,000 hours :
1, The R2R 7HE had built in full analog regenerative power supply, full class A power supplies and signal amps, these designs will produce 25 centigrade higher than the room temperature , we are advice shut down the unit for more than 2 hours after continuously working 12 hours  . The unit only need around 15 minutes for warm up.
2, Keep its top cover , side faces  had least 3 CM space and far  to other heat gears for better heat follow away .
3, Let it working in the room temperature lower than 30 centigrade . For better sound reproduce, we had applied the R core transformer but the power Consumption is large, so if the power supply over 235V or 125V may cause the transformers had hum.

Please note:
        The product even had burn in over 300 hours before shipping, but based on the other users feedback, it need least another 150 hours burn in for get the steady state, and the best state will be after 1000 hours burn in , it mean another 700 hours burn in .
        The product had easy and simply operate so the Use Manual only post on this page。
         The product had the most neutral sound quality, may can't had the best suite all users personal favorite or original audio systems but users can try to change the inside setting for get other sound flavors, and search the best match .
        There are some spare parts and short jumpers shipping with the unit in the package, please keep them well for future use if necessary.
        The product had the pure class A design, we are not recommend stack other products on its top directly, it need least 3CM room on its top side. Also we are not recommend stack it on the top of other hot products , it should place on the shelf .
        Please power off before connect or disconnect the inputs and outputs .
        Power on the product must had more than the half minute after last power off .
        User open the unit and change the inside setting without lost the warranty , but mean the unit working fine before open the unit.
        For the electric safe, user must pull off the AC power cable before open the product .


　

The display auto dark : 
        Push into the jumper for auto dark .The display will dark after user stop operate the buttons on front plate .
        Please operate while the unit had power off .
        For safe, user must pull off the AC power cable before take off the top cover.
        After setting the display auto dark, while the display auto dark, there is only one LED light for sign the unit is working.

DSP-1 Jumpers setting


　

2018 version firmware setting guide:

(The unit since 19th. July 2018 or had updated the 2018 version firmware.)

Note :     For the HDMI or IIS input, if the sources or transmit cause the signal had not enough good, the sound had noise or distortion, push into the jumper for fixed the issue.

S0 : For IN4 (HDMI)(If sound had issue, try to push into a jumper on S0. Default is OFF ) .

S1 : For IN5 (RJ45)(If sound had issue, try to push into a jumper on S0. Default is OFF ) .

S2 : For IN6 (USB) (In default with Amaoero as USB interface, it must OFF . If user modify with other brands USB interface , can change the setting find the best sound quality) .
　

BYPASS = OFF (OS mode) (In default it is 8x oversampling)

Jumpers Number

Jumper Setting

Functions describing

PLLEN

Inactive (OFF)

Active (ON)

PLL setting

DITH

Inactive (OFF)

Active (ON)

Data Dithering

 8X OS

2X OS

The sound will become smoother and warmer while setting lower oversampling.Default setting in the 8X OS which is the best neutral sound.

IPS1

 (OFF)

 (ON)

S1

Reserved

ATT0

Reserved

ATT1

Reserved

BYPASS  = ON (NOS mode) (In default it is NOS3)

Jumpers Number

Jumper Setting

Functions describing

PLLEN

Inactive (OFF)

Active (ON)

PLL setting

DITH

Inactive (OFF)

Active (ON)

Data Dithering

IPS0

Reserved

IPS1

S1

Reserved

ATT0

 (ON)

ATT1

 (ON)

2017 version firmware setting guide:

(before 19th. July 2018)

Note :     For the HDMI or IIS input, if the sources or transmit cause the signal had not enough good, the sound had noise or distortion, push into the jumper for fixed the issue.(While USB and SPDIF inputs,this had not function )(If the source signal not good, may can not support up to 384KHz)
　

S2 = OFF

Jumpers Number

Jumper Setting

Functions describing

BYPASS

Inactive (OFF)

Active (ON)

Note 2

PLLEN

Inactive (OFF)

Active (ON)

PLL setting

DITH

Inactive (OFF)

Active (ON)

Data Dithering

 8X OS

2X OS

The sound will become smoother and warmer while setting lower oversampling.Default setting in the 8X OS which is the best neutral sound.

IPS1

 (OFF)

 (ON)

S1

Reserved

ATT0

Reserved

ATT1

Reserved

S2 = ON

Jumpers Number

Jumper Setting

Functions describing

BYPASS

Inactive (OFF)

Active (ON)

Note 2

PLLEN

Inactive (OFF)

Active (ON)

PLL setting

DITH

Inactive (OFF)

Active (ON)

Data Dithering

IPS0

Reserved

IPS1

S1

Reserved

ATT0

 (ON)

ATT1

 (ON)