<https://www.bursonaudio.com/lovely-cube-lehmann-clone-with-burson-v6-classic-opamp-upgrade/#richSnippet>
<http://schema.org/description>
"Replaced the NE5532 in the headphone amplifier. Not an immediate difference noticeable to be honest but after several times swapping back and forth over a"
<https://www.bursonaudio.com/lovely-cube-lehmann-clone-with-burson-v6-classic-opamp-upgrade/>