After more than 30hours run in, the sound is better now, more soft and clear especially for Mezzo-soprano, it is very sweet I like it very much

I can not believe that it use 32pcs OPA2134 chips, I just receive this headphone amplifier yesterday I get it from a friend and I will only try it for one week and will ship it back   Now it is running in, hope the sound will be better, I will make it work with my T1 headphone :)

This is very interesting DAC based on 8pcs AD1955 chip & Xmos USB Audio The sound is very clear with analog taste   1. XMOS asynchronous USB sound card, this is the basic function for all popular DAC for PC 2. FIFO memory cache architecture which is adaptive technology (I think it is...

This is very interesting full ballanced headphone amplifier which use 32pcs OPA2134UA chips also adopt 2pcs MUESE72320 chips to control the volume, the structure is very interesting    But I only regret that the chassis is not so good ,though the sound is amazing!    

Any Body heard these brand audio machine from china?

These days I bought several Audio device, All are DIY Machine from China   The DAC logo is L.K.S Audio , it is a DAC based on ES9018 chip,   ORAVA Headphone Amplifier,    First I admit that the DAC can offer very clear Sound and it also support DSD, it offer very good PC hifi solution  ...

Miguel, Any other people listen to the SMK-II DAC, Hope to see more information and advice!

Quote:      Wonderful MOD job, Miguel  

     If you have philips big caps, you can try to replace the main power caps and the sound will be better! also you can try to replace the OP275 with OPA627   Quote:  

Quote:      Yes, correct!  

Quote:      I think it is difficult to change the mode of digital filter  

Quote:      Sound is similar to Matrix mini      Matrix mini is good DAC with a small chassis, But HLLY SMK3 is easy for MOD      (I mean you can replace the OP AMP or capacitors)  

Quote:      OPA627(signal to double transform) , there is two OPA627 in one little PCB          

  Quote: We tried OPA2132 / OPA2604 / OPA627(signal to double transform) , the sound is better than OP275, Just try and you can select one which you fell good! :)    

Get the new version DMK-IV PCB now, the USB is update to support 24Bit 96K also replaced the SMT caps in analog circuit and the sound will be better!   The new version DMK-IV will be available in 2 months!