Question about Shure (UA870-WB) Microphone

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Wiring pattern for line input TA4F Connector Shure belt pack RF System Thanx

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  • Anonymous Apr 18, 2009

    need a wiring diagram

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The wiring is on the Shure website at:

http://shure.custhelp.com/cgi-bin/shure.cfg/php/enduser/std_adp.php?p_faqid=7

Posted on Jul 15, 2010

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Shure UC wireless receiver has no ouput


Contact the following for repairs:

http://shure.custhelp.com/app/answers/detail/a_id/4053

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Many things can cause drop outs and it is nearly impossible to troubleshoot online. I suggest calling Shure Applications Engineering at 847-600-8440 when you are with the wireless system. They can help you troubleshoot.

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New Shure PG4. RF and audio fm mic OK to PG4 but can't get mic to work with Peavy 680E. Tried different inputs, cables. Other wireless unts works OK. Wonder if pinout is wrong. Using balanced in/out.


Sounds like a complicated issue. Many things could cause this symptom. Try calling Shure at 800-516-525 to see if they can help troubleshoot.

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Have a Shure PGX Wireless system using over-the -ears and belt packs. Could cell phones be causing our dropout problems at our Sunday morning worship services?


Unlikely, Always make sure both aerials are pointing straight upwards and mount unit as high up as possible, these have switchable frequencies too, try another channel.

Apr 28, 2011 | Shure PGX Series Wireless Microphone...

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Have a Shure SLX Wireless System. The only way the microphone SLX1 or SLX2 is if they are right up to your mouth. If you put the lapel mic on a persons tie you can't hear them. The transmitter is set to...


The Shure SLX2 hand-held microphone has similar performance characteristics to the much-loved (cabled) Shure SM58 vocal microphone. It has a 'cardoid pick-up pattern' intended for close work - being spoken / sung straight into the top of the capsule at no more than about 8 inches from the mouth of the user- to minimise feedback and extraneous noise. If you double the distance between the mouth and microphone the sound level will drop four-fold so distance really matters.
The SLX1 lapel/ lavalier is a semi 'omni-directiona'l pick up pattern microphone, which should work satisfactorily up to 12 inches from the speakers mouth, but closer is better. Always try to get your users to hang it about 6 inches below their chin, at most, and preferably with the top of the microphone capsule pointed upwards towards the mouth.
Here are a few other things for you to try:
  1. There is a volume (gain) knob on the back panel of the SLX receiver unit. Try turning this up to maximum (needs a small screwdriver)
  2. Make sure that both aerials on the receiver are fully extended at different angles to each other and in a clear 'line-of'sight' with the transmitter pack, with no large bits of metal in between which could block the signal. Ideally the receiver should not be more than 25metres from the transmitter. If distance is a problem locate the receiver near to the transmitter and run a balanced (xlr) cable to your mixer/ amplifier.
  3. The angle that the receiver aerials are at should be broadly similar to the angle that the transmitter antenna is at to optimise signal reception.
  4. Make sure the receiver is not located too close to other electrical equipment which may be interfering with the signal (especially voltage transformers, CD or DVD players and hearing loop induction amplifiers which have a strong magnetic field)
  5. Always use good quality batteries - Duracell Ultra or equivalent ( do not use rechargeable batteries as they seldom achieve optimum voltage)
  6. Check that the antenna is tightly screwed into the SLX1 transmitter pack and not damaged.
  7. The SLX2 hand-held microphone has an adjustable level switch inside the body - unscrew the top of the microphone to access it - switch to maximum.
  8. Another possible cause could be an impedance mis-match between the SLX receiver and your amplifier or mixer. There are two outputs on the rear panel of the receiver. One is an XLR (large 3 pin socket) this is LOW impedance and needs connecting to a low impedance input on your mixer/amplifier. You should normally be using this output even if your amplifier has a jack-socket input (use a proper balanced XLR to 6mm trs jack cable rather than a adapter plug). The other output on the receiver unit is a 6mm HIGH impedance, unbalanced, standard jack socket (labelled 'line in'). This would normally be to connect to a guitar amplifier which has a high impedance 'line level' input socket. If you are using this output you may need to use a pre-amplifier to get a big enough signal for a microphone.
You can find the Shure SLX user manual here http://www.shure.com/idc/groups/public/documents/webcontent/us_pro_slx_en_ug.pdf

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1) Make certain the switch on the side of the SLX1 is set to "mic".
2) Make certain the output of the SLX4 receiver plugged into a microphone input, not a line input on your mixer.

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The wire coming from the switch if it has one will go to pin 2 as it is hot(+ve). Pin 3 is cold (-ve) and pin 1 is gound/shield which will make contact when the XLR connector is mounted back in the mike secured with the set screw. There should be a small hole in the side of the base of the mike that the set screw lines up with. Usind the correct size of flat bladed screw driver, back this screw out counter clockwise to secure the connector. If that is wrong, get back to me and i will hunt up my Shure wiring diagrams. If pin 2 and 3 are backwards the mike will be out of phase. Hope this helps.

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The PGX1 bodypack has a switch on the side to set the gain. Make certain that switch is in the "mic" position. Otherwise, simply turn up the volume on your mixer.

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