A three-band unit that fully cuts individual frequency bands rather than just attenuating them.
An isolator is a three-band processor, either a dedicated unit or a mixer section, that uses steep band-reject filters to remove low, mid, or high frequencies entirely at minimum position. Unlike a standard EQ that reduces by a fixed number of decibels, an isolator cuts to silence.
Why it matters
Full-cut isolation lets the DJ perform clean frequency-band swaps: pulling the bass completely out of an outgoing track while adding it to the incoming one avoids low-end buildup that a standard three-band EQ cannot fully prevent.
