As Requested by numerous readers, here is a good 3 channel color organ. Back in the 1970's these were popular and the colored bulbs were typically place in a box with a sheet of "rippled/bubbled" Plastic in front to break up the light patterns. Some units gave very impressive light patterns.

Using an LM324, this circuit has 3 active filters for low, medium and high frequencies.

Trimpots are initally used to set the 3 filters to equal ranges.

A Master control is than used to set for various volume levels.    (I used a trimpot for testing purposes.)

NOTE: SHOCK HAZZARD,
This Master Control "MUST" be Isolated by a "Plastic Shaft and Knob"!
As well, Isolate all other parts after the input transformer to avoid shocks.
Use Extreme caution in doing any tests on the board when its in operation.

Do you know?, More people are Killed with normal house voltages than any other electrical sources!       BE CAREFUL AND LIVE LONGER!

As Shown on the Schematic, A Proper rated FUSE is Highly Recommended.

"T1" is for isolation and signal boost. It can be almost any small audio transformer, used in reverse. The one stated here is cheap and fits the board nicely. "T1" is Essential to "Isolate" the 110 volts from getting into the amplifier that drives this circuit. In a 220 Volt operation this MUST be a Better Quality Transformer than shown here.

"RX" is a series resistor to the 8 Ohm Input. It is Necessary to use an appropriate value resistor to limit the current to T1 if this is connected to a power amp. In all my tests I went directly into T1, but I was running this circuit from a Headphone output, Very low power.
I would suggest a value, somewhere between 50 to 500 ohms, depending on your input power.

Although the picture below shows 3 small T0-92 SCR's, (# EC103M, 400 volt @ 0.8 Amps) there is a provision on the PCB for Larger T0-220 SCR's and Appropriate Heatsinks. As an Example, a TIC106D is rated at 400 volts and 5 Amps.
This would give 500 Watts per channel to Total 1500 watts.
Any "Sensitive Gate" SCR is useable. I recommend "400 Volt" types with an Appropriate Current Rating for your particular application.

Also, a heatsink "THM6232" will fit nicely, as well as some others.

Although this unit is designed for 110 volt operation, 220 volt is possible with appropriate higher voltage SCR's and changing the .47 uF @ 250 volt to a .22 uF @ 600 Volts.
Everything else shoud be fine.

An Etched and Drilled PCB is available for this 110 Volt Color Organ.