V4 Roadster 4-Module 500 Series Rack

The Tonelux V4 Roadster is a 4-slot VPR Alliance-compliant 500-series lunchbox that will power up to 4 500-series modules.

What is the VPR Alliance?
API Audio's VPR Alliance is a program of standardization and consistency guidelines for approved manufacturers wishing to design products for API's 500-series rack format. The program provides complete design specifications for manufacturers interested in producing third-party modules that physically fit and electronically conform to API's rack specifications.

The creation of the VPR Alliance was encouraged by the overwhelming popularity of API's 500-series racks, including the 10-space 500V and the six-space lunchbox, which led to a proliferation of third party modules that fit the API format. Typically installed into API racks, these third party modules had raised issues of warranty and interaction with API-manufactured modules in the same rack.

Because of the variables related to those third party modules, API had previously been forced to declare that inserting any third-party modules into a 500V or lunchbox voided the warranty on that rack. Through the VPR Alliance, API is now able to eliminate confusion as to which third-party products definitively do and do not void the API warranty. The VPR Alliance is a straightforward resolution that saves the company time and money while promoting goodwill to API customers.

Our customers benefit from the VPR Alliance with the knowledge of exactly which products are approved for placement in API racks; customers have a wider range of module choices for their racks that have been tested by API staff for specification compliance.

VPR-approved manufacturers benefit by earning the right to sell API racks and power supplies at dealer pricing to support sales of their products. Alliance membership additionally eliminates third-party research and development costs and production expenses associated with creating an alternate rack solution.

Members can further benefit from the exposure API generates by promoting the VPR Alliance through the strength of the company's various advertising, marketing and public relations channels, including the listing of all members on API's website. Members are encouraged to reciprocate by displaying the VPR Alliance logo on product information, public relations materials and websites.