Xvive Audio P1 Portable Phantom Power Supply with Rechargeable Battery

Plugging a microphone directly into an XLR input jack is never recommended. Remember that, by the principle of leverage, the force exerted on the connector will be proportional to the length of the mic. You can very quickly end up damaging the pins, or even the jack itself, and when phantom power is involved you also risk a short circuit if this happens. Always use a cable, even if it is a very short cable with low-profile connectors.

Wish I could edit questions, but to clarify, my recorder DOES supply phantom power but that will be used to power a FetHead for signal boosting. I'm wondering if the P1 could then be put between the microphone and the FetHead, to power the mic (a variety of mics, really).

You would go form the Rode NTG-2 using an XLR cable (B&H # KOM3006) into the XLR Mic input on the Xvive Audio P1. You would go from the XLR output on the XVive P1 into the Tentacle Sync Track E Recorder input using a Sennehiser CL-1 cable (BH #SECL2).

The Xvive Audio P1 Portable Phantom Power Supply with Rechargeable Battery supplies 12 or 48V of phantom power, but does not supply 12V of T power. Although phantom power will not generally damage a T-powered microphone, they use different circuitry and T-power microphones cannot be properly used with phantom power supplies. A recommended T-power product can be found in the Denecke Dcode PS-T Microphone Power Supply (BH #DEPST): https://bhpho.to/3vd9fT2

Yes, it is possible to use the Xvive Audio P1 Portable Phantom Power Supply to connect a Sennheiser MKH 416 Shotgun Microphone to a Sennheiser SKP 100 G3 Plug-On Wireless Transmitter.

The female XLR connection on the Xvive Audio P1 Portable Phantom Power Supply with Rechargeable Battery accepts an input connection and supplies phantom power to connected microphones. The XLR male output connection on the P1 could be adapted to pass signal along to the Tentacle Sync TRACK E Pocket Audio Recorder.

Yes you can

You could use straps like the Pearstone 0.5 x 12" Touch Fastener Straps (Black, 10-Pack (B&H # PES051210B) to attach the Xvive Audio P1 Portable Phantom Power Supply. As another option to use a 1/4"-20 mounting screw, you can use the Impact Super Clamp with T-Handle (B&H # IMCC106T), which comes with an Impact Standard Stud for Super Clamp with 1/4"-20 Male Threads (B&H # IMSRP102).