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This for information only in the hopes that it assists someone else... I own an XD-V75BP wireless kit with the TBP12 transmitter. I am a sax player (though some might disagree ;-) ) My current setup is for Bari sax and consists of: 2x AKG C519ML micromics (TA3F connectors) 1x AKG B29L minimixer and phantom power supply XD-V75BP Wireless. In this full gig setup, the connections are all simple: TA3F to TA3F cables connect each micromic to the B29L XLR-F to TA4F cable connectos the B29L to the TBP12. The XLR-F to TA4F cable is wired as: XLR pin 1 = TA4F pin 1 (cable shield) XLR pin 2 = TA4F pin 3 (audio +) XLR pin 3 = TA4F pin 1 (audio -) No connection to TA4F pin 2 or pin 4 This wiring is identical to the Shure WA310 connector TA3F to TA3F cables for the micromics when used with either the B29L or an AKG wireless kit (I was using an AKG Perception WMS45 rig prior to acquisition of the Line6 rig) is: Pin 1 + sleeve Pin 2 + Pin 3 I have previously enquired before about connections for making up a cable so that I could run just a single AKG C519ML with my TBP12 and subsequently tried but failed. I wanted the option of being able to run with just one mic for rehearsal etc, or if I was playing tenor (which only requires a single mic). At the time I gave up on the quest but have recently returned and done more research. What I have now succeeded in is in matching the impedances to allow my AKG mic to work with the TBP12. From the TBP12 Pilots guide: TBP12 Beltpack Pinout To TA4F Connector Use the following wiring protocol when using other headset, lavalier, or instrument microphones or cables with the TBP12 beltpack transmitter. â€¢ TA4 pinout â€¢ 1 = GND â€¢ 2 = V+ â€¢ 3 = Signal â€¢ 4 = Z (This pin is tied to Signal for lav mics and tied to Gnd or open for gtr) You can either make a TA3M (male socket) to TA4F plug adapter or make a TA3F to TA4F cable of the required length. My personal choice has been to make up a short adapter piece as it aavoids confusion with cables in my gig bag. Wiring is as follows for a TA4F to TA3M Adapter cable: Parts required: REAN (Neutrik) RT3MC-B Tiny XLR Male REAN (Neutrik) RT4FC-B Tiny XLR Female 4pin Length of quality 2-4mm diameter microphone/instrument cable; 4.7Kohm surface mount (SMC) resistor Pin 1 (TA4F) -> Pin 1 (TA3M) Pin 2 (TA4F) -> 4.7Kohm -> Pin 3 (TA4F) Pin 3 (TA4F) -> Pin 2 (TA3M) Pin 4 (TA4F) -> Pin 3 (TA4F) TA3M Pin 1: Shield Pin 2: Audio Pin 3: No connection TA4F Pin 1: Shield Pin 2: Bridge to Pin 3 through 4.7Kohm resistor Pin 3: Audio Pin 4: Bridge to Pin 3 Wiring is as follows for a TA4F to TA3F cable: (direct connection of mic to TBP12 Parts required: REAN (Neutrik) RT3FC-B Tiny XLR Female REAN (Neutrik) RT4FC-B Tiny XLR Female 4pin Length of quality 2-4mm diameter microphone/instrument cable 4.7Kohm surface mount (SMC) resistor Pin 1 (TA4F) -> Pin 1 (TA3F) + sleeve Pin 2 (TA4F) -> 4.7Kohm -> Pin 3 (TA4F) Pin 3 (TA4F) -> Pin 2 (TA3F) Pin 4 (TA4F) -> Pin 3 (TA4F) TA3F Pin 1: Shield and bridge to connector sleeve Pin 2: Audio Pin 3: No connection TA4F Pin 1: Shield Pin 2: Bridge to Pin 3 through 4.7Kohm resistor Pin 3: Audio Pin 4: Bridge to Pin 3 I have quoted REAN connectors but you can use any mini xlr connectors available to you. I just happen to like working with the REAN ones :-) The mic/instrument cable needs to be 1 way shielded. You can use 2way if you like but there is no connection via the 2nd signal cable. I use Van Damme Pro Grade Classic XKE flexible 1 pair p/n 268-100-000 which is 3.6mm o/d. You could also use Van Damme Pro Grade XKE Unbalanced Pro-patch cable but it has a larger 4.5mm o/d and isn't as flexible. Just ignore one of the pair cables in the 2 pair cable! For surface mount resistors, if you choose 1206 pattern/mount (approx. 3.2mm x 1.4mm) these will solder directly between the pins in a TA4F connector :-) Use solder paste for this job otherwise it is really fiddly! PLEASE NOTE: The above is correct ONLY for the AKG micromic series; AKG C519ML, AKG C519M, AKG C518ML, AKG C518M, AKG C516ML, AKG C516M and the AKG C411. For mics from other manufacturers, the resistance required to bridge pins 2 onto pin 3 will very likely be different. Hope this helps someone... took me long enough to get it nailed! <edited>I cocked up when writing the above out. It is now corrected</edited>