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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Wireless and Communications => Topic started by: Tom Simenauer on August 22, 2017, 07:08:57 am

Title: 10mW vs 30mW Sennheiser transmitters
Post by: Tom Simenauer on August 22, 2017, 07:08:57 am
Hi,
    my first post and i am new to wireless.

I run the sound for an event in central London with guest speakers with  Q&A and the audience is seated over 2 floors in an old church. Max 400 audience.

I am moving away from Line 6 gear as i now have a Allen and Heath digital mixer with wifi mixing.
I know that i could switch to RF1 as the new Line 6 gear is factory default set to RF2 and this might help with the drop outs i have been experiencing.

But with the amount of wifi in central London, i feel to move to channel 38 and buy Sennheiser kit.

A guy at Sennheiser told me that the G3 300 transmitters can switch between 10 and 30 mW.
Most people dont seem to know this as i have read many forums where this is not mentioned.
He said this will increase the signal by up to 15%.

I am on a budget, and the difference between 4 G3 300 systems vs 4 G3 100 systems is quite a bit.

 The receiver units will go through an ASA-1 with paddle anntenas.

The range that the mics  roam is about 25 meters by 20 meters and the upstairs is about 4 to 6 meters above ground floor.
There are a few pillars on the ground floor, but most of the floor has good line of sight.

Would you recommend that 10mW transmitters will do, or go for 30mW?

The guest speakers are sometimes high profile and i really do want zero drop outs.

Thanks Tom.



Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Keith Broughton on August 22, 2017, 07:14:34 am
I have done many shows with 10 mW transmitters of various brands and not had any problems.
Considering the area you have to cover and the antennas you are using, 10 mW should be good.
I have also done smaller conference rooms with 1 mW ULX-D systems. No problem.
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Tom Simenauer on August 22, 2017, 07:18:37 am
I have done many shows with 10 mW transmitters of various brands and not had any problems.
Considering the area you have to cover and the antennas you are using, 10 mW should be good.
I have also done smaller conference rooms with 1 mW ULX-D systems. No problem.
Thanks. Would you say in the space i have described to go for 2 omni or 2 directional anntena's? I was thinking of going for 2 omni's next to the FOH speakers, 7 to 8 feet high on stands.

I Like the look of RF venue's diversity fin.
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: hugovanmeijeren on August 22, 2017, 07:50:40 am
I'm not sure if you are aware, but the EW100 also has 30mW output power. With the EW100 this cannot be changed to 10mW, while the EW300 gives the user control about the output power (10mW or 30mW).

If you do not need the ability for remote control of the units, I'd say go for the EW100 series. They will sound identical to the EW300 and are also very reliable.
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Tom Simenauer on August 22, 2017, 08:05:25 am
I'm not sure if you are aware, but the EW100 also has 30mW output power. With the EW100 this cannot be changed to 10mW, while the EW300 gives the user control about the output power (10mW or 30mW).

If you do not need the ability for remote control of the units, I'd say go for the EW100 series. They will sound identical to the EW300 and are also very reliable.
Thanks, no i wasn't aware of that, that will probably decided it for me to get the EW100 series.
Title: Posting Rules
Post by: Mac Kerr on August 22, 2017, 09:42:09 am
Hi,
    my first post and i am new to wireless.

Please go to your profile and change the "Name" field to your real first and last name as required by the posting rules displayed in the header at the top of the section, and in the Site Rules and Suggestions (http://forums.prosoundweb.com/index.php/board,36.0.html) in the Forum Announcements section, and on the registration page when you registered.

Mac
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Keith Broughton on August 22, 2017, 01:55:24 pm
Thanks. Would you say in the space i have described to go for 2 omni or 2 directional anntena's? I was thinking of going for 2 omni's next to the FOH speakers, 7 to 8 feet high on stands.

I Like the look of RF venue's diversity fin.
The omnis will probably work just fine but make sure they are 1/2 wave. You cannot use the antennas that come with the kits if you are mounting on stands.
The RF Venue fin is a pretty good choice.
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Tom Simenauer on August 22, 2017, 04:30:26 pm
The omnis will probably work just fine but make sure they are 1/2 wave.
What does 1/2 wave mean?
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Jason Glass on August 22, 2017, 05:55:06 pm
What does 1/2 wave mean?
Google "1/2 wave antenna".

Sent from my Nexus 5 using Tapatalk

Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Scott Helmke on August 24, 2017, 12:34:05 pm
What does 1/2 wave mean?

In this context (wireless microphone products) a 1/2-wave antenna is usually a "center fed dipole", such as the Shure antennas sold with their better wireless lines. 1/2 wave means about half the actual RF wavelength of the frequency band being used.

Most inexpensive "whip" antennas sold with cheaper wireless look similar, but tend to be shorter 1/4-wave and not a dipole.  Because they are not a dipole they do not work very well unless mounted on a ground plane, which is usually just the chassis of the wireless receiver itself.
Title: Re: 10mW vs 30mW Sennheiser transmitters
Post by: Don Boomer on August 28, 2017, 03:36:04 pm

I know that i could switch to RF1 as the new Line 6 gear is factory default set to RF2 and this might help with the drop outs i have been experiencing.

It will make a monumental difference if there is any wi-fi operating in your venue. RF2 should be used ONLY if you can absolutely control all wi-fi in your space.