Commercial Audio Products & Custom Electronic Design Services

Southwestern Microsystems specializes in designing and building commercial multiple-channel audio distribution products.  We also provide custom electronic design and prototyping services.  All of our audio products are designed and assembled in the USA.

How can we help you?

We can solve any electronic design problem that you may have.  Our design team has over 50 years of combined electronic design and manufacturing experience.  Contact us for more details.


Our team has over 50 years of combined electronic design experience. We can design to custom specs and/or modify existing designs. Our mission is to use as many USA based vendors as possible.


This includes prototypes and pre-production product development and testing. We can have cases fabricated, custom painting / labeling, packaging, etc. Basically all the steps leading to full production.

Music Systems

For nearly 20 years the ADS Multiple-Channel Commerical Music Distribution System has been in active production. Used by 1000's of businesses - Salons, Spas, Restaurants, etc. It is a highly reliable, budget friendly system for commercial music distribution

Tanning Salons

Per a customer request, we solved a design flaw in a tanning bed's communication system that has existed in the tanning industry since the 1990s. The solution eliminates a failure mode that causes salon shutdown and unhappy customers!

Simple & Reliable

Our mission is to provide electronic designs for our music systems and custom electronics at are easy to install and maintain. In the end our products are installed as tools to create a positive customer environment.

Help & Support

This is where we shine! Since the support team is also involved with the system design - We know our systems from the inside out. All of our support staff is based in the USA with email & phone support. Also, we can fix everything we sell.


These are some of the products that we have designed & sold over the years.

ADS Model 8x10 Audio Distribution System (active production)
Music-in-a-Flash 4 Channel Music Player (out of production)
Data Protection System for Tanning Salon Tanning Beds (active)
4 Channel Music Player Pre-Amp for Multiple Channel Music Distribution System (active)

Our Customers

We have been a primary supplier to the Tanning Industry since the 2008 and many of our clients have been acquired by Palm Beach Tan Brand. In 2016 we expanded into offering custom Electronics Design Services. 

Meet Our Leadership

Eric Holst

President & Owner

Wayne Holst

Lead Design Engineer
(He asked for No Picture)

Would you like to start a project with us?

Please contact Eric to discuss your project.  Please complete our Contact Us Form and he will gladly have a conversation with you.  He looks forward to learning more about your project.