Color Organ input question

pendrgn · 15th February 2006, 04:06 PM

Hello,
I am the sound room engeneer for my church. We are planning on having a dance sometime near easter for hte youth. I wanted to have some fancier lighting, so I went online and did a search for color orgains, and light organs. I found a kit that was resonably priced, and purchased it. It works great in testing, but I have a problem when it comes to connecting it to teh church amp. My church's amp puts out 30watts to the speakers on its lowest setting, and can be turned up to 300 watts on the highest setting. The problem I have is the color organ can only accept a maximum input of 2 watts from the sound source. It then has a 120V ac input, and puts out 200 watts max per channel, on three channels. Is there a way to reduce the signal from the church's amp(probably for the purpose of the dance it will be set at about the half way point which would be around 150watts) down to the 2 watts maximum sound input. Please let me know if anyone can help.

thanks,

mike

phase_accurate · 16th February 2006, 07:14 AM

This can be done by the use of a voltage divider. That is a circuit consisting of two resistors. To be able to dimension it properly one has to know the input impedance of the circuit.

Regards

Charles

sreten · 16th February 2006, 10:36 AM

Hi,

Probably best to use a small mains transformer (for safety purposes).

Connect the amplifier to the mains side and the secondary to the CO.

The input to the CO is more likely 2V max, rather than 2W.

A small 115 VAC to 5 to 9 VAC transformer should do the job.

/sreten.

pinkmouse · 16th February 2006, 11:17 AM

2V input probably means it needs line level signals. Just plug it into a spare output on the desk, and forget about running it from the amp. You can test it by just plugging it into the output of a CD player.

dnsey · 16th February 2006, 02:53 PM

Quote:

it will be set at about the half way point which would be around 150watts

Just to clarify, the acoustic 'half-way point' on a 300W amp won't be 150W (you'd hardly notice the difference), but more like 30W.

Is it a 100V line system? If so, you could just use a 2W speaker transformer to drive the organ.

15th February 2006, 04:06 PM	#1
pendrgn diyAudio Member Join Date: Feb 2006 Location: Palmyra	Color Organ input question Hello, I am the sound room engeneer for my church. We are planning on having a dance sometime near easter for hte youth. I wanted to have some fancier lighting, so I went online and did a search for color orgains, and light organs. I found a kit that was resonably priced, and purchased it. It works great in testing, but I have a problem when it comes to connecting it to teh church amp. My church's amp puts out 30watts to the speakers on its lowest setting, and can be turned up to 300 watts on the highest setting. The problem I have is the color organ can only accept a maximum input of 2 watts from the sound source. It then has a 120V ac input, and puts out 200 watts max per channel, on three channels. Is there a way to reduce the signal from the church's amp(probably for the purpose of the dance it will be set at about the half way point which would be around 150watts) down to the 2 watts maximum sound input. Please let me know if anyone can help. thanks, mike

16th February 2006, 11:17 AM	#4
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	2V input probably means it needs line level signals. Just plug it into a spare output on the desk, and forget about running it from the amp. You can test it by just plugging it into the output of a CD player. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
PT P-1A I2S input question	marcus1	Digital Source	2	19th December 2011 02:30 PM
newbie with input tran. question and wiring question	imo	Solid State	0	18th January 2006 10:10 PM
organ amp question	whatsnext	Tubes / Valves	1	12th September 2005 11:13 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

16th February 2006, 07:14 AM	#2
phase_accurate diyAudio Member Join Date: May 2002 Location: Switzerland	This can be done by the use of a voltage divider. That is a circuit consisting of two resistors. To be able to dimension it properly one has to know the input impedance of the circuit. Regards Charles

16th February 2006, 10:36 AM	#3
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Probably best to use a small mains transformer (for safety purposes). Connect the amplifier to the mains side and the secondary to the CO. The input to the CO is more likely 2V max, rather than 2W. A small 115 VAC to 5 to 9 VAC transformer should do the job. /sreten.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)