About Us

Andy Marshall Designs is a company specializing in products for the music industry, specifically tube amplification and products catering to tube amps. We sell direct to end customers anywhere in the world.  We invite you to look at our products page for more information on what we do.  While you're at it, download a product sheet from the lit and reviews page, and let us know if you have any questions.

Thanks for visiting our site!

Contact Information

Andy Marshall Designs
4704 113th Ave SE
Snohomish, WA  98290-5560

Sales and Technical Support by Phone:
Sales and Technical Support by Email:

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All sales are direct and facilitated through our eBay Store. We will sell and ship to any country: if you happen to live in a country that eBay doesn't service, please email your order to sales@thdelectronics.com.


A Few of Our Favorite Things...

Check out our links section for some of the people and products we love.