A highly practical black Ozite (carpet) covering the 15mm 11-ply birch plywood cabinet construction ensures these cabinets are built to last a lifetime on the road or in a nightclub. For touring applications and installations where carpet may not be the preferred finish solution, Yorkville’s Ultrathane black painted finish is available on most Pulse models.

Advanced High Frequency Protection

Most Pulse cabinets use PTC™ circuit protection. PTC™ is an ingenious current sensing / self-resetting breaker that offers some serious advantages over current protection schemes used in many loudspeaker cabinets. This protection scheme, while always present in the signal path, remains inaudible until it becomes necessary for it to react. It kicks in at a point where it effectively reduces output to the horn and protects that diaphragm from damage due to excessive power input or signal distortion. Unlike a breaker it does not require a physical reset to allow signal back to the horn driver, and unlike a bulb or fuse, does not need to be replaced if the circuit is tripped, and the fuse is blown.

Where PTC™ shines is in heavy feed back environments where most horn diaphragm damage occurs. In rare situations even where a microphone might be dropped in a monitor, the sustained ‘squeal’ can destroy diaphragms in seconds. PTC™ will significantly reduce output level to the horn to protect the diaphragm. When the situation has been rectified, and the feedback eliminated the horn will return to full operating level within half a second.

Several cabinets in the Pulse line use the tried and true CTL™ protection scheme, specifically in speakers where lower power handling may not need the additional protection PTC™ can provide.

Pulse Features