Top Hat M4 is a rack headphone monitoring system with engineer and producer talkback. It combines four headphone amplifiers, individual mixes and external producer boxes.

• Four headphone amplifiers, each with a three-input mixer.
• Two producer boxes with microphone and communication destinations.
• Five master talkback circuits.
• Mix interruption for engineer or producer communication.

Main format19 inch rack, 1UAmplifiers4 independentMix inputsInput 1/2, external and cue/clean feedConnectionsXLR and D-sub according to circuit