MQA through Toslink

You may consider Bluesound Node 2 which retail for $499.00. But I am not sure if you will hear full MQA unfold through its Toslink output. 

I own a Vault 2 and using its analog (RCA) output for MQA playback. 

Can you tell us more about your implementation? Why Toslink? What is the digital source? What is the amplification?  If I have a full picture, I can be of more help :-)

My understanding is Node2 supports MQA though its coax digital, probably through Optical as well but I am not sure. Of course, the downstream DAC will need to also support MQA in order to hear MQA quality content. Analog RCA is a sure bet without the need for an external DAC.

@marktomaras 

hi, the source is Tidal and FLAC, transmitted over WiFi to multiple Airport Expresses, which feature an mini-Toslink output. 

They currently go via Toslink into Fiio D03 DACs and then to the integrated amps via RCA. 

I’m looking to improve the DAC section of the chain. My goal is a more 3D soundstage. The Fiio DAC sounds great in tone, rhythm and separation. But it doesn’t have the depth/texture I desire. Budget is $200-$400

Does the airport express also have the option to output via ethernet and even USB?  This will remove your toslink limitation.  Toslink is not particularly desirable by the way.  Something like the Meridian Explorer 2 can accept a USB signal from the Airport if the airport can use the USB port to output audio.  Usually hifi via ethernet is more desirable.  A previous poster mentioned Bluesound Node 2.  This is a killer option for you.  Forget toslink, go ethernet, and use the Bluesound.  The version 2 is $500 new.  You just have to find a deal on one, which seems possible.  Bluesound has a great control app for android and iOS so you can control with any device and stream Tidal, etc.