Is wired better than the bluetooth (to listen to MQA)?
Absolutely.
Bluetooth is limited to 16/44.1 (24/48 with aptX HD, which the Bose 700 do not support) and MQA can unpack to 352.8kHz. Any MQA unpacking will bottleneck before it hits your ears.
Go for wired and you’ll get the full MQA performance, though as many people have mentioned, MQA doesn’t always do the music justice so it may be worth comparing the two to find what you prefer.
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