Heritage Audio OST-4 v2.0 500 Series 4-Slot Rack with OS Technology

SKU: HAOST4V2 MFR: HAOST4V2
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Key Features

  • Unlock pristine audio with this 500 Series rack, perfect for studio microphone preamplifiers.
  • Experience ultra-low noise performance, ensuring clean recordings with your favorite preamps.
  • Enjoy versatile connectivity with XLR inputs/outputs, ideal for any studio recording setup.
  • Get stable & reliable power for your modules, thanks to the robust OS Technology in this rack.
  • Achieve optimal gain staging with a high-quality Heritage Audio preamp in your 500 series.
  • This 4-slot rack provides a solid foundation for expanding your collection of preamps and EQs.
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Special Order?Estimated to Ship: 08/19/2025
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Heritage Audio OST-4 v2.0 Specifications

  • Connections

    4 x XLR Input
    4 x XLR Outputs

  • Number of Rack Slots

    4x

  • Maximum Current

    400 mA per rail per slot, 1.6 A total, 1.8 Non-Continuous

  • Phantom Power

    Maximum Phantom Power Current: 140 mA

  • Operating Voltage

    Universal 100 to 240 VAC

  • UPC Code

    609832678069

About Heritage Audio OST-4 v2.0

Discover the superior functionality and design of the OST-4 V2.0 500 Series 4-Slot Rack with OS Technology. This advanced enclosure is meticulously engineered to accommodate any 500-series modules and devices, including 'double wide' modules and the most power-intensive class-A and vacuum tube designs.

The OST-4 V2.0 500 Series Rack is equipped with Heritage Audio's innovative On Slot Technology, offering unparalleled protection, filtering, and isolation for each individual channel. Unlike many 500-series enclosures available, which utilize a basic power supply design feeding every channel in parallel, the OST-4 V2.0 Rack ensures each channel has its own isolated and regulated power supply. This unique feature guarantees optimal performance of every 500-series module installed, without the risk of a 'power hungry' or faulty module compromising the performance of others.

Experience enhanced audio quality with the OST-4 V2.0 Rack, as many 500-series devices, particularly mic preamps, exhibit lower self-noise and improved performance when housed in this enclosure. The V2.0 model introduces the innovative Link feature, which allows for seamless linking of each channel to the next at the push of a button, eliminating the need for patch cables.

Crafted at the Heritage Audio headquarters in Spain, the OST-4 V2.0 500 Series Rack embodies the brand's commitment to cutting-edge manufacturing and design techniques without compromising on audio quality. This durable, portable enclosure is an ideal solution for both professional and home studios looking to expand their collection of 500 Series modules.

The OST-4 V2.0 Rack not only provides a safe and compatible housing for your 500 Series modules but also enhances their sonic potential. It offers the broadest range of compatibility, ensuring that even the most 'demanding' modules receive the power they need while keeping adjacent modules unaffected. Elevate your audio experience with the OST-4 V2.0 500 Series 4-Slot Rack with OS Technology.

Heritage Audio OST-4 v2.0 Features

  • Audio Links: Link output with input of adjacent slot
  • Outputs: On gold plated XLRs
  • External Power input: On gold plated XLRs
  • Inputs: On gold plated XLRs
  • Compressor Links: On gold plated pin headers
  • On Slot Technology: Individual power per slot
  • Slots (4): On gold plated edge connectors

Product Documents

User Manual

Key Features

  • Unlock pristine audio with this 500 Series rack, perfect for studio microphone preamplifiers.
  • Experience ultra-low noise performance, ensuring clean recordings with your favorite preamps.
  • Enjoy versatile connectivity with XLR inputs/outputs, ideal for any studio recording setup.
  • Get stable & reliable power for your modules, thanks to the robust OS Technology in this rack.
  • Achieve optimal gain staging with a high-quality Heritage Audio preamp in your 500 series.
  • This 4-slot rack provides a solid foundation for expanding your collection of preamps and EQs.

What's in the box:

  • Heritage Audio OST-4 v2.0 500 Series 4-Slot Rack with OS Technology
  • 5-Pin XLR Power Supply
  • Heritage Audio 1 Year Limited Warranty