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Old Sunday, November 18th, 2007, 08:25 PM
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Wireless Monitor Speaker for Nursery

We need to set-up a small monitor speaker in our nursery. Unfortunately we cannot run speaker wire to this location, so need a wireless transmitter/receiver solution.

Distance is approx 50 metres/150 feet with a few brick walls inbetween.

I'm looking for a reliable solution with enough power to cover this distance. Any suggestions?

Soundsplitter
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Old Sunday, November 18th, 2007, 08:49 PM
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If you already have an RF assistive listening system (such as Listen Technologies), you could connect the output of the receiver to a small amp and then to a speaker - better yet - connect it to a small powered speaker. We have tried this (though we are not currently using this solution) and it works but the sound quality is not nearly what it would be in a wired configuration; it's okay, just not terrific.

Jack

Last edited by JAE; Sunday, November 18th, 2007 at 08:50 PM. Reason: spelling error
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Old Sunday, November 18th, 2007, 08:57 PM
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I would really push for a wired connection.

There are WAY too many variables with wireless connections.

They are a long way from plug and play.
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Old Monday, November 19th, 2007, 05:12 AM
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Have done this with the domestic 2.4ghz video sender devices and it works alright provided there isnt a huge amount if people walking in between the signal. they are cheap so you could experiment. I have even pointed them up at the roof and "bounced" the signal a bit. Very hit and miss though.
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Old Monday, November 19th, 2007, 05:58 AM
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I'd go for the wired option. Much more dependable than any wireless, unless you want to pay BIG$$$ for digital.
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Old Monday, November 19th, 2007, 07:17 AM
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Quote:
Originally Posted by soundsplitter View Post
Distance is approx 50 metres/150 feet with a few brick walls in between.
the key words there are the distance-over 150 feet-and the "few brick walls". Neither is conducive to a strong reliable signal from most consumer quality gear-even microwave signals don't work well through multiple brick walls. The best you can do is try it a couple of different ways, and see what happens. If it just won't go reliably, then you've made a strong case for a wired solution.
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Old Monday, November 19th, 2007, 08:41 AM
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You might be able to get creative and (presuming it's UHF or higher) bounce the signal around the obstacles .. a high-gain beam pointed out a window, and passive repeaters outdoors (as many as necessary) (probably with decent directivity), and a high-gain beam on the receiving end. That might work. Emphasis on the "might".

Or you might could use a low-band exciter (we're talking below VHF here), where the nearfield of the antenna covers the whole building.

I'd find a way to run a wire, even if it's out the window, around the eave of the building, and back in another window.
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Old Monday, November 19th, 2007, 09:34 AM
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We use a receiver from our ALS connected to some computer speakers and it is ok, not great, just ok but it does work, it is free, and it is easy.
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Old Monday, November 19th, 2007, 12:50 PM
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We use an FM radio transmitter. that way any FM radio can be used.

We also replace the hold music with the service on sundays so people around the church can put them selves on hold and hear it that way.

~Jay
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Old Monday, November 19th, 2007, 05:47 PM
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Thank you to everyone for their suggestions.

We’ve looked at a wired solution, but unfortunately don’t have access between the 2 buildings we’d need to traverse.

We need to find a wireless solution with enough power and probably in the lower RF bands to transmit the distance and penetrate the walls.

I expect we will need to do some experimentation, but we do have a limited budget for trial and error, so need to focus on the solution most likely to work.

The 3 solutions I am aware of are:

- FM transmitter like Crane http://www.ccrane.com/radios/fm-tran...ansmitter.aspx
- ALS Assistive Listening System (such as Listen Technologies)
- Reverse a wireless mike, so the transmitter input comes from the mixer and the receiver goes into a power speaker

I’d appreciate any other suggestions people have or experience in running any of the above solutions over a reasonable distance or between buildings.

Thanks for your assistance.

Soundsplitter
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Old Monday, November 19th, 2007, 07:16 PM
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Here's another source for a FM transmitter. There are many others. Just search for low power FM transmitter on Google.

You might just want to go with a ALS. Then you could also offer it to help people in the sanctuary hear.
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Old Thursday, January 17th, 2008, 04:47 AM
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Wireless Remote

I have had really good results with the Ramsey Electronics FM30.

We use it as a hearing assist in a lot of churches and because it is using commercial FM frequencies, you have much better chance of getting through brick walls than the gig frequencies.

I usually pick 88.1meg and you can set the O/P power up to 25mw. Any standard FM radio will work - put one in the church kitchen as well.

The only problem is, you have to build it and it takes about 6 hours.
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