using "extra pair" in cat-5 for speaker

[raymondh]

Will there be any problems connecting the ELK-SP15 to 2 unused pairs from a cat-5 run to a keypad on an M1?

I have it hooked up and it seems to be working but I want to make sure this isn't a problem. One thing that I have noticed is the speaker makes a clicking type noise every couple of seconds but I think that is the watchdog on output 2.



Sorry for all the questions...

 

[Spanky]

Raymond,
The M1 should not be watchdoging in normal operation. If it is watchdogging you could hear a click when the M1 power back up.

 

[raymondh]

Raymond,
The M1 should not be watchdoging in normal operation. If it is watchdogging you could hear a click when the M1 power back up.

Every 1-3 seconds I hear a click (or thump) from the speaker connected to output 2.

I'm thinking about removing the siren from that output and connecting a bunch of the small ELK speakers around the house. How man in series can I connect on output 2 along with the ELK speaker that came with the kit?

 

[123]

Depending on the number of speakers, you'll probably have to connect them in a combination of parallel and serial configurations. The final impedance should not be below 4 ohms.

Here's a simple online calculator for parallel reistance: http://www.sengpielaudio.com/calculator-paralresist.htm

So one 8 ohm Echo speaker and three 32 ohm SP-12s, all in parallel, will result in 4.57 ohms. That's what I have in my house and I plan to add a fourth speaker (another Echo). However, I won't be able to place it in parallel because that will reduce the total below 4 ohms. I'll probably put the two 8 ohm Echos in series and then in parallel with the three SP-12s.

 

[raymondh]

Depending on the number of speakers, you'll probably have to connect them in a combination of parallel and serial configurations. The final impedance should not be below 4 ohms.

Here's a simple online calculator for parallel reistance: http://www.sengpielaudio.com/calculator-paralresist.htm

So one 8 ohm Echo speaker and three 32 ohm SP-15, all in parallel, will result in 4.57 ohms.

That's perfect since I want to add 3 SP12 speakers.

 

[123]

Depending on the number of speakers, you'll probably have to connect them in a combination of parallel and serial configurations. The final impedance should not be below 4 ohms.

Here's a simple online calculator for parallel reistance: http://www.sengpielaudio.com/calculator-paralresist.htm

So one 8 ohm Echo speaker and three 32 ohm SP-15, all in parallel, will result in 4.57 ohms.

That's perfect since I want to add 3 SP12 speakers.

whoops, I meant the SP-12s ... they're 32 ohms! I modified my original post so that I don't lead anyone astray.