Hifiman Sundara with DIY Lehm*** headphone amp kit + BT5.0 connection

Описание: This is a DIY kit Lehmann headphone clone kit that I made a few months ago, with the addition of a SQ867 solid Bluetooth board with CSR8675 support LDAC aptx to provide i2s digital data output received by ES9018q2m dac and IV preout BB opamp. I add this path of input from Lehmann.

Sundara headphones from HIFIMAN are in the midle class with 32ohm impedance which certainly gives difficulties in selecting amps, to get optimal performance. with the hope that this Class A can provide a linear output and enough to drive.

for Song from the World's Greatest Vol
2 Chesky Record, Camille Thurman - Cherokee. it is my favorite recording for the device test, because this is a live recording, so many details are there from the sound in the environment, such as at 0:44 such as the sound from a mobile phone vibrate, and there are still many sounds that can be heard and the ability of the device to reveal it.

For test the perfect ability of headphones can not be done like placing the mic on the speakers. for that I made my own box to place a large AT2020 mic and provide a chamber to lead to the membrane plannar headphone driver, this is made from MDF material and additional to the dampening chamber (foam). the result: quite good recording all the sound from the driver with a little distortion.


how do it instal the board of BT SQ867?
link:
   • Видео