Rolls PB23 Single-Channel 48V Phantom Power Supply

Rolls PB23: A Single-Channel 48V Phantom Power Adapter

The Rolls PB23 is a single-channel inline phantom power adapter that delivers 48V phantom to one microphone, adding condenser support to any mixer or recorder that lacks it. It targets the exact case where a single condenser mic has to run from a camera, a portable recorder, or an older mixer with no phantom of its own. A 100 kHz switching supply produces the phantom voltage with no audible noise added to the signal, and output pull-down resistors ensure it plays nicely with any mixer downstream. One male and one female XLR put it inline in the mic cable, and the included Rolls PS27 supply powers it. In a compact 3 x 2.5 x 1.25 inch chassis, the PB23 is the simplest way to phantom-power a single microphone.

48V Phantom for a Single Condenser Mic

The PB23 supplies 48V phantom power, the standard voltage professional condenser microphones expect, to one microphone at a time. Phantom power carries DC up the same balanced cable that returns the audio, feeding the condenser's electronics without any separate power at the mic. Providing a full 48 volts means the box runs demanding studio condensers, not just low-voltage electrets, and it is also capable of 12V operation. For a single-mic setup, one clean channel is exactly what is needed and nothing more. For a podcaster, videographer, or engineer adding one good condenser to a phantom-less input, the PB23 is precisely scaled to the task.

Clean 100 kHz Switching Supply With No Added Noise

The PB23 builds its phantom voltage with a 100 kHz switching supply, keeping the switching frequency well above the audio band so it never intrudes on the sound. Adding phantom inline should not add hiss or hum, and this design ensures the microphone's own low noise floor is preserved. Output pull-down resistors keep the unit compatible with any mixer or preamp downstream, avoiding the level and turn-on quirks a poorly matched supply can cause. The audio passes through untouched while the powering is added silently. For clean recordings where a condenser's quietness is the whole point, that noiseless supply protects the signal.

Inline XLR With Included PS27 Supply

The PB23 has one female XLR input and one male XLR output, so it inserts directly into a microphone cable with no adapters, plus a 5mm DC jack fed by the included Rolls PS27 supply. That inline form means it disappears into the cable run between the mic and the mixer, adding phantom exactly where the signal needs it. The compact 3 x 2.5 x 1.25 inch chassis tucks onto a desk, a stage box, or a camera rig. As the single-channel sibling of the PB223, it covers the one-mic job at the smallest size. For anyone who needs 48V phantom in one place and no more, the PB23 is the tidy, reliable answer.