“My eyebrows were initially raised because this diminutive speaker filled my test room very easily and ran loud, to boot via an AAC stream from my iPhone 8. The room spanned around 21 x 13 feet (6.5 x 4m) with an eight foot (2.5m) ceiling. The Rockster allowed All The Lovers from Kylie Minogue to shake the windows.”
“My eyebrows continued to rise because of the sheer quality of the music. To be honest, I think of Teufel and I think of bass. Sometimes too much bass. Not here. The Rockster offered clarity and transparency with a 3D soundstage sitting layered with a front to back effect. That is, Minogue’s voice was pushed forwards with the backing instruments a measured distance behind. This helped diction and the emotion in the vocal to come though.”
“There was plenty of instrumental detail, though, with a bass that was happy to sit within the mix. Hence, delicacy was never swamped or masked. I heard plenty of acoustic guitar strumming, tambourines and even a cello making an appearance. For a lossy file, the effect was surprisingly rich."
“I then connected my MacBook via Bluetooth (sharing the connection with my iPhone) and played St Thomas from Sonny Rollins at 24bit/96kHz. Played via Audirvana Plus, I didn’t expect to hear too much detail. Streaming is more of a convenience than a transport for audio quality yet the Rockster displayed a fair bit of that. Yes, there were the usual streaming-inspired uncontrolled elements in the upper mids but also a lot of focus during the mid-song drum solo with impressive transient ability while the Rollins sax was impressively breathy and reedy for a stream. Organic in other words. The sense of clarity in this stream mode was quite startling for a Bluetooth speaker at this price point, highlighting the value for money.”
“[…] The Teufel Rockster XS is not exactly low in price but, condsidering the sonic output, it still displayed excellent value for money. Surprisingly good in its streaming performance with an appreciative sonic improvement in wired mode, refreshingly lacking in EQ gimmicks and other toys, this Bluetooth speaker is a fine performer indeed.”