The PTM-11 is an entry level mono IEM system while the PTM-10 is more advanced and has more features. The PTM-10 is a stereo IEM system with balance function, focus function, limiter function and more. What's more, the PTM-10 has better anti-interference ability that makes it more reliable during performance.
Feel free to check out both units here:
PTM-11: https://phenyxpro.com/products/ptm-11
PTM-10: https://phenyxpro.com/products/ptm-10
Oct 24, 2024