AKG WMS 40 Mini Dual Instrument

I've been using this system on my accordion (both left and right side) for a year and have had absolutely no trouble with it. It was able to work through five or six walls in the opera house with ten other wireless transmitters competing with it.
Having said that, I found that the receiver was prone to local interference from my synthesiser (SM Pro VMachine) which was next to it on my pedalboard. Sometimes the signal light will come on even if the transmitter pack is not on. I moved it as far as possible from the synth and it has been working very well since.

The battery life is very good, even when using discount store batteries and the low battery level warning is good. Another nice function is that it will do it's best to stay on when there is very low battery but with an equally low battery it will refuse to turn on so there's no danger of starting a gig with a battery that's about to die.
The transmitters are very light and the clip is very adaptable so I can clip it onto my accordion straps easily.

Although it is not immediately obvious from the product description these transmitter packs CAN be used with electret/condenser microphones. They output phantom power on the mini XLR so I was able to simply plug in my existing Superlux condenser gooseneck microphones.

I bought these as an introduction to going wireless with the intention of upgrading to something more expensive in the long run but I haven't seen any reason to change yet. If there is a significant change in audio quality I am not able to detect it.

I bought this product with high hopes and initially gave a very negative review of the quality of sound of this product. I was very disapointed. I tried everything from grounded to non-grounded power, even changed the 1/4" cables. I thought nothing helped. The sound was bad and I couldn't use the product.

BUT then I got new cables from a friend and decided to give it a last go. It worked like a charm! No pops, no humm and no interference! I've been using it now for a while and the battery consumption is minimal and the range more than adequate for my needs. I use it for two bass guitars (fretted and frettless that I switch between songs) and it works very well.

It turned out that the 1/4" cables that came with the set were faulty, and the ones I initially replaced them (what are the chances of that!). So check the cables!

A friend pointed me in the direction of this radio system because 3 reasons 1.) good price, 2.) AKG reputation in wireless sytems 3.) the big reason, two transmitters. Brilliant, now for a gig two guitars ready to pick up and play in seconds. I leave the radio permanently attached to the strap, bought myself a triple Hercules guitar stand, so that when you grab the guitar for a quick change , the strap/radio comes clean with the guitar without getting hooked up on the framework. The power consumption is minimal - I've only used 3 times (each 3 hrs) and battery is still going strong. Can be used with rechargables (I use Enloop for long residual charge) Range is good, can wander all round the dance floor without any loss. Only one fixed frequency, but so far absolutely no interference or compromise, a choice would have been handy maybe. Build quality seems ok although very lightweight & plastic, and the transmitter aerial looks a bit vunerable but so far no problem, just need to be aware and look after the kit!!. Soundwise I dont hear any change in the sound. The freedom of movement gained with the wireless is brilliant, stage work becomes much more fun! Definitely recommended