[docentore]

Anyone can explain the buttons on the M400+ or take photo of manual please? Got one with no manual but can't change source to usb

 

[alexeisk]

Anyone can explain the buttons on the M400+ or take photo of manual please? Got one with no manual but can't change source to usb

Hi!
1 - balanced out 4.4, volume controlled
2 - 3.5 out, volume controlled
3 - 3.4 line out
4 - USB in
5, 6 - track forward and back, should be supported with software, i.e. works not everywhere
7 - short press - stop/play, works if supported with software, long press - switch bluetooth on or off
8 - gain control (amplification level)
9 - on/off, when on - short press changes digital filters

charge port on the back, DAC may not work when charging. Also mike and bluetooth LED are on the back.

My m400+ switches itself to USB automatically when USB port connected onto port 4 at the picture.

My m400+ works with the phone only via OTG cable, not with regular usb-c cable.

 

[docentore]

So need to get USBC otg cable. Right.
Altough i'm fine so far with LDAC.

Thanks.

PS. Track control is all over the place, but not sure if I'll ever need. It is not going to leave my home. Using xDSD as portable on the go

 

[docentore]

Hi!
1 - balanced out 4.4, volume controlled
2 - 3.5 out, volume controlled
3 - 3.4 line out
4 - USB in
5, 6 - track forward and back, should be supported with software, i.e. works not everywhere
7 - short press - stop/play, works if supported with software, long press - switch bluetooth on or off
8 - gain control (amplification level)
9 - on/off, when on - short press changes digital filters

charge port on the back, DAC may not work when charging. Also mike and bluetooth LED are on the back.

My m400+ switches itself to USB automatically when USB port connected onto port 4 at the picture.

My m400+ works with the phone only via OTG cable, not with regular usb-c cable.

Actually the DAC works while charging i my unit.

Any firmware upapdates etc available?

 

[alexeisk]

So need to get USBC otg cable. Right.
Altough i'm fine so far with LDAC.

Thanks.

PS. Track control is all over the place, but not sure if I'll ever need. It is not going to leave my home. Using xDSD as portable on the go

The easiest way is to plug an OTG adapter like the one pictured into the phone and then you may use regular type c to usb cable. As for me, cabled connection outperforms bluetooth substantially.

 

[alexeisk]

Actually the DAC works while charging i my unit.

Any firmware upapdates etc available?

I seem to have a very early version of the m400+. Support told me that the firmware update will only happen if serious bugs are detected in the device.

 

[johnchpark]

I would just like to point out something I noticed about the YinLvMei M400 Plus.

I always knew that the M400 Plus increased IEM's bass and reduced the treble response. But I thought it was just an internal DSP they added.

However, testing all of the output ports of the M400 Plus, I realize that it may not be a DSP filter, but rather simply due to the Output Impedance of each port.

The LO port adds the least amount of color to the IEM sound, but still has reduces the treble, compared to the Fiio M11 "neutral" sound.


I'm contacting YinLvMei to clarify, but everyone should be aware that the M400 Plus is going to add varying level of "color" (increased bass & rolled treble) compared to other devices such as the iPhone dongle or DAPS.

 

[alexeisk]

I would just like to point out something I noticed about the YinLvMei M400 Plus.

I always knew that the M400 Plus increased IEM's bass and reduced the treble response. But I thought it was just an internal DSP they added.

However, testing all of the output ports of the M400 Plus, I realize that it may not be a DSP filter, but rather simply due to the Output Impedance of each port.

The LO port adds the least amount of color to the IEM sound, but still has reduces the treble, compared to the Fiio M11 "neutral" sound.


I'm contacting YinLvMei to clarify, but everyone should be aware that the M400 Plus is going to add varying level of "color" (increased bass & rolled treble) compared to other devices such as the iPhone dongle or DAPS.

Thank you, very interesting charts! Can you do the same for the different filters, at least for a couple or three of the seven available?

 

[Infoseeker]

I would just like to point out something I noticed about the YinLvMei M400 Plus.

I always knew that the M400 Plus increased IEM's bass and reduced the treble response. But I thought it was just an internal DSP they added.

However, testing all of the output ports of the M400 Plus, I realize that it may not be a DSP filter, but rather simply due to the Output Impedance of each port.

The LO port adds the least amount of color to the IEM sound, but still has reduces the treble, compared to the Fiio M11 "neutral" sound.


I'm contacting YinLvMei to clarify, but everyone should be aware that the M400 Plus is going to add varying level of "color" (increased bass & rolled treble) compared to other devices such as the iPhone dongle or DAPS.

I always thought this was some kind of innate always-on Crossfeed DSP effect. But your interpretation seems believable.

But I like to source roll, and this audiophile colored presentation makes for a unique experience for so. (I use audiophile here as in "not hi-fidelity" but for enjoyment-targeted subjective playback)

 

[johnchpark]

Thank you, very interesting charts! Can you do the same for the different filters, at least for a couple or three of the seven available?

I tested all the different filters on Gain 2. The turquoise one is Filter 1 on Gain 1.

None of them makes an impact on IEM's frequency response

 

[alexeisk]

Thank you! Surprisingly, I think I can hear the difference between some of them. Perhaps it has something to do with the dynamic performance.

 

[docentore]

The easiest way is to plug an OTG adapter like the one pictured into the phone and then you may use regular type c to usb cable. As for me, cabled connection outperforms bluetooth substantially.

Got that adapter, it does work with my phone unfortunately. I'll stick to BT connection.

 

[wwyjoe]

I tested all the different filters on Gain 2. The turquoise one is Filter 1 on Gain 1.

None of them makes an impact on IEM's frequency response

May I know if these tests/charts are based on M400plus (AKM version) or M400E (ESS version)?

 

[alexeisk]

Got that adapter, it does work with my phone unfortunately. I'll stick to BT connection.

https://xduoo.net/product/type-c-to-type-c-cable/ This one works fine for me.

 

[docentore]

Apologise if this was made clear before but anyone knows if the M400+ coax can be used as spdif IN?