ACC Dolphin Topside Control Panel ESP-55A Introducing the ACC Dolphin Topside Control Panel ESP-55A — a durable, reliable interface for spa and hot tub control. Designed and manufactured by Applied Computer Controls (ACC) in the USA, it’s built for professionals and DIY enthusiasts who want dependable ACC system performance. Model: ESP-55A — Dolphin top-side control panel designed for ACC spa systems. Made in USA: Proudly designed and manufactured in Azusa, California. In‑house engineering: ACC develops and builds its electronics, ensuring solid compatibility and straightforward parts availability. Industry heritage: Part of ACC’s legacy since the early 1980s, continuing a tradition of reliable spa controls. Ideal application: Suitable as a replacement or upgrade component for ACC hot tub and pool/spa control interfaces. With decades of experience behind it, the ESP-55A brings a trusted control experience to your spa—streamlining operation, maintenance, and troubleshooting. It’s the kind of component you install once and rely on for years, backed by ACC’s USA‑based design and manufacturing ethos and supported by a network of spa specialists familiar with ACC electronics. Applied Computer Controls (ACC)® products are well known throughout the pool and hot tub industry. They started the revolution of using electronic controls to control hot tubs back in the 1980's. Their tradition of designing quality products continues today. All of their products are designed and manufactured in house, in their state of the art facilities in Azusa, California. WHY USE APPLIED COMPUTER CONTROLS (ACC) PRODUCTS? In 1982 Applied Computer Controls was established to design, manufacture and sell electronic controls to the spa industry. Today they are still designing and manufacturing electronics. Their first product was the SC-100. It was introduced at the 1983 NSPI convention - The Moscone Center in San Francisco. All Applied Computer Controls products are proudly made in the USA. Bath & Spa Parts Online carries a select line of Applied Computer Controls (ACC) products, readily available for immediate delivery. If you have any questions about their products, please feel free to ask us for assistance. You can reach our Product Specialists via telephone, chat or e-mail during normal business hours. WHY USE APPLIED COMPUTER CONTROLS (ACC) PRODUCTS? In 1982 Applied Computer Controls was established to design, manufacture and sell electronic controls to the spa industry. Today they are still designing and manufacturing electronics. Their first product was the SC-100. It was introduced at the 1983 NSPI convention - The Moscone Center in San Francisco. All Applied Computer Controls products are proudly made in the USA. Bath & Spa Parts Online carries a select line of Applied Computer Controls (ACC) products, readily available for immediate delivery. If you have any questions about their products, please feel free to ask us for assistance. You can reach our Product Specialists via telephone, chat or e-mail during normal business hours.
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