Mackie M48 Single-Channel 48V Phantom Power Supply for Condenser Microphones

Mackie M48: 48 Volts of Phantom Power Wherever You Need It

The Mackie M48 is a single-channel 48V phantom power supply that adds true condenser-microphone power to any signal chain that lacks it, patching in-line between the microphone and the preamp over standard XLR. Powered by the included AC adapter or an optional 9-volt battery, it runs in the studio or in the field with equal ease. For anyone whose mixer or interface came up short on phantom power, it is the small box that quietly saves the session.

Clean, Standard-Compliant Phantom Power

The M48 delivers a full 48 volts, within plus or minus 3 volts, at up to 40 milliamps of current, the standard specification that virtually every studio condenser microphone expects. A transparent, low-noise circuit passes the microphone signal through without coloring it or adding hiss, so the only thing the M48 contributes is the power the capsule needs. Balanced female-XLR input and male-XLR output keep the connection professional and the signal fully differential end to end.

Studio Adapter or Field Battery

Two power options make the M48 as much a location tool as a studio one. The included AC adapter handles fixed installations, while a 9-volt battery drops in for remote and off-grid recording where mains power is unavailable. Front-panel Power and Low-Battery LEDs confirm the supply is live and warn you before the battery fades mid-take, so you are never guessing whether your condenser is actually getting its voltage.

Who the M48 Is For

Home and project studios use it to add phantom power to a mixer or interface that never had it; location recordists and filmmakers carry it to power a shotgun or lavalier condenser off a battery; live engineers patch it in ahead of a phantom-less board. Wrapped in a heavy-gauge steel chassis small enough for any gig bag, the M48 turns a missing feature into a solved problem.