About Marcus

Marcus Tran didn't plan to become an audiophile. In March 2022, working from home and tired of his ATH-M50x sounding harsh on six hours of Zoom calls, he spotted a Sennheiser HD600 deal on Drop. Reddit r/headphones had been recommending it for years. He bought it. He plugged it into his laptop, heard a soundstage he didn't know existed, and spent the next three months reading every frequency response chart he could find.

Three years later, he owns four headphones, two IEMs, a Schiit Modi+/Magni+ stack, a Qobuz Studio subscription, and a Mac mini he set up as a dedicated listening machine in the spare bedroom he shares with his partner Hannah's bookshelves and work-from-home setup. His Sundara (October 2023, 2022 revision) is his daily driver — the upgrade that finally made him stop second-guessing the HD600 he'd been nursing for a year and a half. The HD600 is still plugged in. He uses both.

The IEM journey ran through a Kiwi Ears Quartet and a 7Hz Timeless before landing on the Moondrop Blessing 3 as a keeper. He sold the others without much regret. A Moondrop HEXA covers commuting and anything that doesn't need the Blessing 3's technicalities.

For portable use, he runs a FiiO BTR7 paired with his phone — and a Qudelix 5K when he wants to dial in EQ on the IEMs. He's tried three Bluetooth dongles; the BTR7 stuck.

Undisclosed Sounds is where Marcus writes the guides he needed when he started. Not a professional review outlet, not a measurements-only resource, not a community forum. A site written from the perspective of someone actively in the hobby, with the honest limitations that entails: strong opinions on gear he's actually used, careful hedging on gear he's heard briefly, and straightforward deference to Crinacle, ASR, Resolve, and Currawong on territory outside his experience. He doesn't accept loaner gear. He doesn't review what he hasn't heard. The site name came with the domain — an ambient music label from a previous era — and he kept it because he liked the way it sounded.