Custom Car & Home Audio Atelier in Kraków

Jullia is an atelier for custom car audio and home audio, working out of Kraków. We rework premium factory sound systems from the inside — the car looks exactly as it left the showroom, and every change lives in the sound alone.

Car audio, reworked from the inside

Our car audio commissions start with the factory system already in the car. The amplifier comes out, the power-supply circuit is reworked, key components are replaced, and everything is returned exactly where it was. No new speakers are bolted in for show, no visible hardware is added — the dashboard stays the dashboard the owner bought. Alongside the electronics, we correct sound insulation and factory defects that quietly work against clean sound, and we finish with DSP tuning built around the cabin itself. Two commissions from the atelier, a Mercedes GL 550 and a Chevrolet Volt, are documented in full on our car audio page.

Home audio, built on the same restraint

A productized home audio line is coming, built on the same philosophy as our car work: the same hand, the same restraint, systems designed around a room and how someone actually listens rather than around a spec sheet.

A quiet, personal way of working

Jullia works by introduction, not open enrollment. A listening is a quiet hour spent in a fully reworked car or room before anyone commissions their own system — read more about why on our philosophy page, or request a listening directly. There is no sales pitch and no rush, only the sound, played in a car that gives no visible sign of what changed inside it.

The atelier is based near Kraków and reachable directly: call Oleksandr, the founder, or Mark, who manages listening requests, on our contacts page. Every commission — car audio or, soon, home audio — begins the same way, with a conversation about what someone has stopped hearing in their own car or their own room.