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[andy craig]

Hi guys.
I am building an IEM rack which will incorporate 8 x Sennheiser 300 transmitters.
I intend to use an 8 way combiner which will not provide power over the aerial BNCs.
The prospect of 8 of the Sennheiser wall warts fills me with dread.
Does anyone know of a suitable product which would provide 8 x 12V DC outlets?

Cheers,
Andy.

[Bob Charest]

Hi guys.
I am building an IEM rack which will incorporate 8 x Sennheiser 300 transmitters.
I intend to use an 8 way combiner which will not provide power over the aerial BNCs.
The prospect of 8 of the Sennheiser wall warts fills me with dread.
Does anyone know of a suitable product which would provide 8 x 12V DC outlets?

Cheers,
Andy.

Don't know if this is a good unit or not, but it does have 8 outputs. As the Sennheiser NT 2-3 outputs 12V DC at 400mA it might do just what you need. I also don't know about the plug size and if it matches the input on the EW300 transmitters: http://www.ebay.com/itm/like/271700556415?lpid=82&chn=ps

[Scott Holtzman]

You just need a power supply with sufficient current. Give yourself 20% headroom for inrush current.

[Chris Johnson [UK]]

I'm pretty sure sennheiser solutions actually sell something like this. A 4/8 way PSU for G3 Tx units. Give them a call

[Tim Miller [UK]]

The Professional Wireless GX-8 has 8 12v outputs - there's not that much of a price difference between that and an AC3200 (in the grand scheme of things).

[Jelmer de Jong]

A simple ATX computer PSU will provide 15A at 12 V, enough to power 30 G3-300 units at 350mA each.

[Branko Pucekovic]

A simple ATX computer PSU will provide 15A at 12 V, enough to power 30 G3-300 units at 350mA each.

This is definitely the cheapest solution. I use it to power the eight pieces AKG WMS 450 receivers.

[Scott Holtzman]

This is definitely the cheapest solution. I use it to power the eight pieces AKG WMS 450 receivers.

Yes, and a you don't have to use a huge ATX, a power supply for 1U chassis would be easier to deal with. 

The key is to fuse each connection at the correct current. 

What I would do is get panel mount Bantam fuse holders.  Bus them on one side to the PS then put your drops on the other.

For the return you can get a barrier strip with a shorting strip, use a spade connector on each drop.  If you wanted to be supercool you could put a tri-state LED that would be green when the fuse is good and red when the fuse is out for each drop.

[Keith Broughton]

A simple ATX computer PSU will provide 15A at 12 V, enough to power 30 G3-300 units at 350mA each.

Are these not switch mode PSUs and don't they generate a bit of RF?

[andy craig]

Thanks for the replies.
In the end I discovered a Professional Wireless product which is designed for exactly this application.

Cheers,

Andy.

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