Heritage Audio OST-6 V2 6-Slot 500 Series Rack Chassis with On Slot Technology

Heritage Audio OST-6 V2: A 6-Slot 500 Series Rack With Room to Grow

The Heritage Audio OST-6 V2 is a 6-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. Six slots strike a middle ground, offering meaningful capacity while staying compact enough for a desktop or a small rack. For a project studio whose module collection is maturing, it is the enclosure that keeps pace.

Six Slots of Individually Regulated Power

On Slot Technology gives each of the six slots its own regulated and isolated power feed rather than a shared parallel supply. Isolation stops a demanding module from stealing current from its neighbors or adding noise to the rack. Many 500 Series devices run quieter and perform better in this environment, especially microphone preamps. Across six slots, that consistency adds up to a noticeably cleaner rack.

Power for Demanding Class A and Tube Modules

Each slot delivers up to 400 mA of audio-rail current, with 140 mA of phantom power for modules that require it. Power-hungry Class A and vacuum-tube designs that can brown out a shared-supply rack run reliably here. Because each slot is fed independently, one thirsty module never compromises the others. The result is dependable performance from a mixed collection of modules.

Channel Link Builds Chains Instantly

A rear-panel Link button connects one slot's output straight to the next slot's input with no patch cables. That lets you assemble a chain such as preamp into EQ into compressor in seconds, and with six slots you can build two independent chains at once. Internal linking keeps the back of the rack clean and the signal path short. It turns a collection of modules into ready-made processing chains.

Universal Power and Solid Construction

A universal 100-240V AC supply powers the OST-6 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 daily studio use. Its six-slot size remains portable enough to move between rooms when a session calls for it. Reliable power and a solid build make it a dependable studio fixture.

Cleaner Modules Across Six Slots

Individual regulation lowers interference between modules and keeps the noise floor down, even with a full complement of six. A clean, isolated feed lets each preamp or dynamics module reach its full potential. Gold-plated balanced XLR connections keep every input and output reliable. The enclosure is designed to protect and elevate everything it holds.

Compatibility With the 500 Series Standard

The 500 Series format has stayed popular for decades, and the OST-6 V2 accepts any module that follows it, including double-wide units and demanding Class A or tube designs. That broad compatibility lets you combine brands and processor types freely across the six slots. There are no awkward modules the rack cannot host. It is a flexible home for a diverse collection.

Who the OST-6 V2 Is For

Project studios and engineers with a growing set of 500 Series modules will value the six-slot capacity and clean power. A mixing engineer can keep a preamp chain and a mastering chain loaded at the same time, while a producer gains headroom to expand. It suits anyone who has outgrown a four-slot rack but does not yet need ten. For a maturing modular rig, the OST-6 V2 hits the balance of size and power.