Advice on relaying sound

[unclesteve]

Hi all,

some advice please on relaying sound for a service from a small chapel to another room in the same building which is approximately 150 - 200 metres away. My idea is to place a small 8-way Peavy mixing desk in the chapel and have the minister wear a lav mic ( gemini ) and suspend two or three shure mics to pick up the hymn singing from the congregation. In the room I need to relay to there is a suitable Bose system with a small mixing desk.

My problem is that I am unsure as to the correct way of connecting my remote mixing desk to the system in the far room. What cable will I need ? Will I need a DI box ?

 

Steve

[bruce]

Decent quality screened 2 core cable - eg microphone cable.

 

Cat5 would do the job too - see HERE and HERE.

 

 

 

The import thing is to make sure you use a balanced output at the source and a balanced input at the destination. So no need for a DI if your mixers haev balanced connections.

[unclesteve]

Hi Bruce,

thanks for the speedy reply. Much appreciated.

 

Steve

[Yorkie]

I don't know if you've had experience using the Gemini mic, but from my experience you can't expect very good quality out of them, and the receiver will need to be very close to the mic.

[Simon Lewis]

The import thing is to make sure you use a balanced output at the source and a balanced input at the destination. So no need for a DI if your mixers haev balanced connections.

 

 

Steve, Bruce,

 

Whereas I agree that using a balanced connection is the way to go, running two systems up to 200m apart (even in the same building) may introduce some interesting earth loop problems.

 

Using a passive DI box "backwards" (or even a pair of DIs) may be a necessary measure if the direct cable connection method doesn't work, or is too noisy.

 

Simon

[bruce]

Whereas I agree that using a balanced connection is the way to go, running two systems up to 200m apart (even in the same building) may introduce some interesting earth loop problems.

 

Fully agree - see my comments in one of the above threads which I referenced on using an isolating transformer.

 

Although, if it's balanced, lifting the ground at the rx end shoud also do the job. If it's balanced....

[Bobbsy]

<snip>

 

Although, if it's balanced, lifting the ground at the rx end shoud also do the job. If it's balanced....

 

A 200M run shouldn't be attempted with anything except a balanced line!

 

And, just for clarity, bruce's reference to "lifting the ground at the rx end" refers to the SIGNAL ground. The mains ground must never be removed under any circumstances!

 

Bob

[bruce]

Thanks for the clarification bob, that's precisely what I meant...

[unclesteve]

Thanks guys,

I'm in a position as to be able to test in advance of the gig and will try your suggestions out.

Again, many thanks

 

Steve