To be fair I see the predicament with lapel mikes. Batteries need to be changed regularly if they are wireless and people are rough with them sometimes or don't know how to use them. If done correctly any number of setup could still work though.
The place I work has several large teleconference rooms. I haven't looked at the gear there closely, but it looks as if they use some kind of gooseneck microphones on the table.50 people seems a very large number compared to the teleconferences I have seen. There usually aren't more than 15 people at any one locating.
 
Anyways...good luck. Maybe someone else will chime in with another idea.

Starise
Anyways...good luck. Maybe someone else will chime in with another idea.

Thanks. I will test current system Monday, with 20-25 people in the room. And probably I need a bit of luck ;)

I use a Samson UB1 for conferencing. Can't recommend it enough - it's been perfect for me.

msmcleod
I use a Samson UB1 for conferencing. Can't recommend it enough - it's been perfect for me.

Thanks. An interesting device to try a boundary mics. Do you use it with Samson Sound Deck?
 
After the test yesterday, my conclusions is that not personal mics is the way to go in my case:
* 2 speakers was using lavalier mic, both have decided to not attach it to out neck, one had the transceiver in the same hand, effectively having the mic ~30cm away from the head (with obvious result). Another has fixed the transceiver on body, but still had the mic in hands. Articulating, so with 10-30cm distance.
* 2 speakers was using dynamic mic. Both was handling it strict vertical, so pointing toward ceiling. One ~10cm from the mouth, another ~20cm.
* the fact other could speak without giving mics or thinking into which direction to turn the head has improved the experience and the speed of discussions.
* almost everything was recognizable on remote end.
 
What was not good:
* central conference processing (so outside of my tweaking possibilities) was handling mode switch with cracks/several seconds too loud or almost not audible signal. I guess I have to balance the total input signal better (I currently just mute room mics, without adjusting personal mics levels)
* the natural room hall effect and the noise are on the very border of acceptable level. I definitively have to improve that (will try placing, caving mics, if that does not work other mic types).
 
During the next test I am going to try ReaFIR as real time noise reducer. If that works better, I will need to replace DM with a computer. But these days that is even cheaper then good quality mics..
 

azslow3

msmcleod
I use a Samson UB1 for conferencing. Can't recommend it enough - it's been perfect for me.

Thanks. An interesting device to try a boundary mics. Do you use it with Samson Sound Deck?
 
After the test yesterday, my conclusions is that not personal mics is the way to go in my case:
* 2 speakers was using lavalier mic, both have decided to not attach it to out neck, one had the transceiver in the same hand, effectively having the mic ~30cm away from the head (with obvious result). Another has fixed the transceiver on body, but still had the mic in hands. Articulating, so with 10-30cm distance.
* 2 speakers was using dynamic mic. Both was handling it strict vertical, so pointing toward ceiling. One ~10cm from the mouth, another ~20cm.
* the fact other could speak without giving mics or thinking into which direction to turn the head has improved the experience and the speed of discussions.
* almost everything was recognizable on remote end.
 
What was not good:
* central conference processing (so outside of my tweaking possibilities) was handling mode switch with cracks/several seconds too loud or almost not audible signal. I guess I have to balance the total input signal better (I currently just mute room mics, without adjusting personal mics levels)
* the natural room hall effect and the noise are on the very border of acceptable level. I definitively have to improve that (will try placing, caving mics, if that does not work other mic types).
 
During the next test I am going to try ReaFIR as real time noise reducer. If that works better, I will need to replace DM with a computer. But these days that is even cheaper then good quality mics..
 

I use it directly into my work laptop via USB. I use it mainly with Skype when conferencing with my colleagues in the US. It's way better than the conference mics we have in the office.
 
The best thing about it is it seems to have a built in compression and/or AGC, so matter where you are in the room, you get a fairly even level.