From the German HiFi-Magazine AUDIO 9-2020, pg. 62:Are there any internal pictures?
The AUDIO-Magazine gave no details about the used components. But they gave twice the advice to buy the Volcano along with the Ultrasone Edition 15 Headphone since the Volcano is acoustically and optically optimized for the Edition 15 Headphone. In the AUDIO-ranking the Volcano got 145 out of 145 points - the same as the new T+A HA 200.
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