Heritage Audio OST-10 V2 10-Slot 500 Series Rack Chassis with On Slot Technology

Heritage Audio OST-10 V2: A 10-Slot 500 Series Studio Backbone

The Heritage Audio OST-10 V2 is a 10-slot 500 Series enclosure with On Slot Technology, giving each module its own individually regulated and isolated power supply. A 500 Series enclosure powers and connects the modular preamps, EQs, and compressors built to the 500 Series standard. Ten slots make this the largest enclosure in the OST line, enough to house an entire modular front end at once. For a busy studio, it is the backbone that keeps every module ready to go.

Ten Slots of Individually Regulated Power

On Slot Technology gives every one of the ten slots its own regulated and isolated power feed instead of a shared parallel bus. Isolation prevents a demanding module from drawing current away from its neighbors or injecting noise into the rack. Many 500 Series devices exhibit lower self-noise and better performance in this enclosure, especially microphone preamps. At ten slots, that clean power is what keeps a large rack quiet and dependable.

Full Power for an Entire Rack of Modules

Each slot supplies up to 400 mA of audio-rail current, with 140 mA of phantom power on tap for modules that need it. Filling a rack with power-hungry Class A or vacuum-tube modules can brown out a lesser enclosure, but independent regulation keeps every slot supplied. No single thirsty module compromises the performance of the rest. That reliability matters most when all ten slots are populated.

Channel Link for Multiple Signal Chains

Rear-panel Link buttons connect one slot's output directly to the next slot's input with no patch cables. Across ten slots you can build several independent chains, such as tracking, mixing, and mastering paths, side by side. Internal linking keeps the back of the rack uncluttered and the signal path short. It turns a full rack into a set of ready-made processing chains.

Universal Power and Rugged Build

A universal 100-240V AC supply powers the OST-10 V2 anywhere with only a mains cable. The chassis is built to the same rugged standard as the rest of the Heritage Audio range, ready for constant use in a working studio. Its size suits a permanent home in a studio rack rather than daily travel. Solid construction and clean power make it a long-term fixture.

Cleaner Performance at Scale

Individual regulation keeps interference and noise low even with all ten slots filled. A clean, isolated feed lets each preamp and dynamics module reach its full quiet potential rather than fighting a shared supply. Gold-plated balanced XLR connections keep every input and output reliable across the rack. The enclosure is designed to protect and elevate a large module collection.

Compatibility With Any 500 Series Module

The 500 Series standard has thrived for decades, and the OST-10 V2 hosts any module that follows it, including double-wide units and the most demanding Class A and tube designs. That broad compatibility lets you mix brands and processor types across all ten slots. There are no modules the rack cannot accommodate. It is a future-proof home for an ever-expanding collection.

Who the OST-10 V2 Is For

Commercial studios and engineers with large 500 Series collections will get the most from the ten-slot capacity and clean power. A mixing engineer can keep tracking, mixing, and mastering chains loaded simultaneously, while a facility can centralize its modular gear in one chassis. It suits anyone whose rack has outgrown smaller enclosures. For a serious modular studio, the OST-10 V2 is the flagship backbone.