Assembly Masters is a quality manufacturer of custom toroidal transformers. We use advanced production and test equipment that allows us to meet and exceed our customers’ specifications.
All of our transformers are 100% tested using micro ohmmeters, LCR meters, turns counters and hi-pot testers that are calibrated and traceable to the high national standards set by our industry.
Industries Served
- Audio
- Broadcast
- Electromechanical
- Electronic
- Lighting
- Power Transmission
Committed to High-Quality Components
Assembly Masters is committed to producing high-quality assemblies.
Advanced Production & Testing
At Assembly Masters, we are proud of our track record of exceeding our customers' expectations with quality assurance, diverse manufacturing, and on-time delivery.
Established in 2000, Assembly Masters is committed to providing our customers with high-quality products, since our founding, we have made right on that promise and continue to with our attention to detail and adherence to the high standards set by our industry.
At Assembly Masters, we use advanced production and testing; our precision custom assemblies will meet or exceed your requirements.

We offer built-to-spec products that precisely meet your needs. RoHS compliant products are available as required.
- High return on investment
- Reduced inventory investment
- Lower inventory risk
- Reduced space and labor
From the Midwest, across the Americas, and worldwide, our manufacturing has earned a reputation for consistency and superior quality in our products.
Bring us your design, and let us show you what we can do!
To learn more about our toroidal transformers,
contact the professionals at Assembly Masters or call (574) 293-9026.
Competitively priced, quality-driven toroidal transformers.