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Limestone Builders Program
Develop With Us
Vacuum tube audio is built on curiosity, experimentation and passion. Many of the most interesting designs in the world do not come from large companies – they come from dedicated builders, engineers, DIY enthusiasts and vintage audio lovers who are constantly exploring new ideas. At Limestone Store we would like to actively support this community.
If you are developing a project that uses vacuum tubes, especially designs based on Ray Tubes, we invite you to share your work with us.
Who are we looking for
DIY audio builders
vintage audio enthusiasts
hobbyists developing tube circuits
small independent designers and experimenters
engineering students and educational laboratories
audio DIY communities and enthusiast groups
What You Can Receive
Exclusive discount coupons for purchasing Ray Tubes
Technical support and consultation for tube selection and operating points
Opportunity to feature your project on Limestone channels
Early access to selected Ray Tubes products
Participation in a growing community of tube builders
Build. Experiment. Share.
Together we can keep the vacuum tube tradition alive while pushing it into the future.
Submit your project through the form below:
The Limestone Builders Program is designed to support the DIY and enthusiast community within European Union (EU) countries. The program is intended for individual builders and hobbyists rather than commercial operations. As such, program discounts are not available to commercial amplifier manufacturers, professional audio equipment producers, companies purchasing tubes for serial production, distributors or resellers of vacuum tubes, or businesses seeking bulk or OEM purchasing conditions. Professional manufacturers and commercial partners are welcome to contact us separately to discuss commercial cooperation and distribution terms.
Participation in the program is subject to the General Terms and Conditions, Store Terms and Conditions, and Privacy Policy, and all benefits are subject to product availability. We reserve the right, at our sole discretion, to review applications, reject participation, or remove participants from the program at any time if eligibility requirements are not met or if the program terms are violated. By submitting the application form, participants confirm that they have read and agree to these terms and conditions.
