Lewitt 7-Pin XLR Cable for PURE TUBE Microphone PSU, 16.4 ft (5 m), Black

Lewitt 7-Pin XLR Cable: The Lifeline Between Your PURE TUBE and Its Power Supply

The Lewitt 7-Pin XLR Cable is the dedicated interconnect for the Lewitt PURE TUBE tube microphone, the multi-pin run that carries both the audio signal and the tube's operating voltages between the microphone and its external power supply. Because a tube microphone cannot run on standard phantom power, this cable does double duty: it delivers the heater and polarization voltage the valve needs while carrying the microphone's output back to the PSU. It measures 16.4 ft (5 m), terminates in screw-lock 7-pin connectors at both ends, and is the same cable supplied with the PURE TUBE, offered on its own as a spare or a replacement. When the one cable that powers your microphone is the single point of failure in the signal chain, having a known-good backup on hand is simply good insurance.

Why a Tube Microphone Needs a 7-Pin Cable

A standard condenser microphone runs on 48-volt phantom power sent down an ordinary 3-pin XLR cable, but a tube microphone works differently. The valve inside the PURE TUBE has to be heated and biased with several separate voltages that a 3-pin XLR simply cannot carry, so the microphone ships with its own external power supply and a dedicated multi-pin cable to connect the two. The 7-pin XLR cable provides the extra conductors needed to route the heater voltage, the polarization voltage, and the audio signal all on one run between the microphone and the PSU. Its oxygen-free copper conductors keep resistance low so none of those voltages or the delicate tube signal are degraded over the length of the cable. Without this specific cable, the PURE TUBE cannot be powered at all, which is why it is engineered as a matched part rather than a generic accessory.

Length, Connectors, and Everyday Reliability

The 16.4 ft (5 m) length gives you the freedom to place the microphone out on a stand or boom in the live room while the power supply sits safely at your desk, rack, or console, without stretching the connection tight. Both ends terminate in 7-pin connectors with threaded screw-lock collars that tighten down onto the microphone and the PSU, so an accidental tug on the cable or a bump to the stand will not break the connection in the middle of a take. The cable is finished in black to disappear into a typical studio setup.

Who the Lewitt 7-Pin XLR Cable Is For

This cable is for every Lewitt PURE TUBE owner who wants a spare on hand, needs to replace a lost or damaged original, or runs a second rig and needs another matched interconnect. Because the PURE TUBE depends entirely on this one cable to receive power and return its signal, keeping a known-good backup in the case means a single frayed conductor never ends a session. If you own the PURE TUBE, this is the exact cable it was built to use.