Unlike other bassy earphones I've listened to, the In-Ear2's bass is forceful but not overpowering. The In-Ear2s are punchy, but only in a metaphorical sense - unlike some earphones which can leave you feeling like you were literally just kicked in the head.
Listening through Nirvana's In Bloom and Lithium the In-Ear2's reproduced the guitars with their trademark grunginess in tact, while kick drums and cymbals punctuated the mix with plenty of presence. A fairly logical progression into the Foo Fighter's Monkey Wrench resulted in the same conclusion: if you're into heavier music these 'phones are a good match.
This low end performance isn't just good for rock music. Switching to Frou Frou's Let Go and the In-Ear2's lend great nuance to Imogen Heap's voice and her string accompaniment alike. Similarly the orchestral tones of Fleet Fox's self-titled album were well reproduced.
This low-end bias does have the knock-on effect of leaving the In-Ear2's lacking slightly in sparkle at the high end of the frequency spectrum. That isn't to say that they're terrible, or that this will necessarily have a negative impact on all genres of music, because this isn't the case. Plus, it's worth remembering that increased performance comes at an increased price and these aren't cheap 'phones as it is.
I'm not entirely convinced, however, that the In-Ear2's cost over a number of other earphones is buying you better sound quality. The Klipsch Image S4 also offer a warm, clear, bass-friendly sound signature, and can be picked up for less than £70. The Aurvana In-Ear2's have a nice look and feel to them, but I imagine most buyers will listen to their earphones more than they look at them.
The Aurvana In-Ear2 headphones' good design and aesthetics aren't in dispute. Whether they're worth paying over the odds for will depend upon how much those aspects matter to you - those not bothered will find similarly good performance for less cash elsewhere.