Xaudia Active Dynamic Microphone (ADM)

The ADM is my take on the ‘Speaker as microphone’ concept. You may have come across this idea elsewhere, in certain vintage microphones, perhaps using a larger speaker as a sub-mic for kick drum, or in some boutique models, some of which are a bit low fi, but can be surprisingly good. 

A small speaker and a dynamic moving coil microphone operate on the same principles, with the differences being in the details such as mass of the coil and diaphragm. Ideally a speaker should be robust and handle some power, whereas a microphone element might be as light and sensitive as possible. Headphone speakers are generally small and light and can make decent microphones. One classic example is the Beyer M380 which uses the same element as (older) DT770 headphones.

The ADM uses a genuine new-old-stock Sennheiser headphone speaker which sounds very nice when reversed and used as a microphone. Like the Beyer M380, this has a figure-8 pickup which means that it also has a decent proximity effect and good side-rejection. The impedance of this speaker is a little higher than most microphones, and so I have fitted a phantom powered balanced buffer circuit to lower the impedance, reduce the noise floor and increase the common mode rejection, as well as increasing the output level. Overall it works very nicely.

I have a limited supply of parts and so this will inevitably be a limited run. 

Further details and sound clips to follow soon. Available from September 2022 at £199 plus postage.

Xaudia XM10 ribbon microphone (discontinued)

I occasionally get asked about the discontinued XM10 model, usually when one comes up on the second hand market,  and so here is a little bit about them. I don’t have any sound clips of the XM10 and it was never sent out for review.

The XM10 was intended to be our budget offering, with the ribbons and transformers made and fitted here at Xaudia, and the bodies made overseas. The transformer is the same as in the BM9, and the ribbon is a little narrower. It has a big bottom end with a large proximity effect,

In the end we only produced a small run of perhaps 20 of the XM10 in 2017 to 2018.

They were excellent at the price point, but in a way not very different from, say, a fully upgraded SE ribbon or something of that class, We won’t do another run as all of our resources were funnelled into starting Extinct Audio as a new business and producing the BM9 family of microphones.