Sound Riser

My sound system was broken so I decided to make a simple amplifier circuit with vu meter. It works pretty good and it's cheap too. I got my parts about 16$. So start to make your own mini Sound Riser I promise that it will worth it if you done everything correctly.

-150W / 4Ohm / Dual Cone LoudSpeaker
-VUMeter and Amplifier circuit (Kit or do it yourself)
-12V and 9V battery
-Audio Cable
-Toggle Switch
-FM Transmitter Circuit
-FM Receiver Circuit
-Preamplifier Circuit
-220ohm resistor
-104(Code) Capacitor
-9V Battery Clip
-Potentiometer Knob(Optional)
-Enclosure
-Some Creativity

First, we need to put our loudspeaker into the enclosure. I use some hot glue to hold it in place.Then, I connect 4 wires (2 per each terminal of the speaker). 2 of them goes to vu meter circuit and others are go to the amplifier circuit. At this point I drill some holes in  enclosure and hot glue the vu meter.

I cut out two piece of long wire and solder it to the jack and secure everything with heat shrink tubing.

I made a FM receiver circuit and solder "output" wires to the "input" of the preamplifier according to the schematic.

Now, we need to make the transmitter circuit to transmit our voice to amplifier. For this I used radio transmitter and some other components.Then I tune it in the non-used radio frequency and test it luckily it works.

It's time to assemble everything according to the schematic. I put amplifier and preamplifier in top enclosure and make a groove to feed wires inside of it. Then add some final touches and hot glue everything in the big speaker enclosure.

In conclusion; I think that it have pretty good sounds and style. However It also needs a paint job and some minor adjustments. There is the video I hope you liked it.

P.S.= Sorry for bad english and video. Wireless voice transmission not shown in video.

Thanks