Classic Series - Beat
Patented single-layer Optimised Shielding Plus One technology, OS+1
High-end Series - Songbird
High-performing single-layer Patented Optimised Shielding Plus One technology, OS+1
High-end series - Rhythm
Sophisticated two-discrete-layer patented Advanced Optimised Shielding Plus Two technology, AOS+2
Ultra high-end Series - Resonant
Ultra-high quality three-discrete-layer patented Advanced Optimised Shielding Plus Three technology, AOS+3
Ultra high-end series - Melodious
Flagship five-discrete-layer patented Advanced Optimised Shielding Plus Five technology, AOS+5

All CFM Audio Cable products are meticulously handmade in Hong Kong