About Us

Modulus Industries combines two audiophile reference brands into a single organization. Audible Illusions has been producing reference-quality preamplifiers and phono preamplifiers for more than four decades. Butler Audio is well-known for studio and home audio products. BK Butler's latest designs create a new class of amplification that brings musicality to a previously unattainable level. Our goal was to combine the strengths of both companies into a single US-based brand, creating reference products that look as good as they sound. Our company was founded on the idea of helping people reproduce great music in their homes with reliable and beautiful products. Our products are the result of decades of engineering, design, and studio experience.