Designed and built by Lace
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DJ mixers didn't always have eq sections on each channel. What is now taken for granted used to be a luxury. Only a few years back most parties and clubs would have a basic mixer with no tone controls. Unhappy with this I decided to figure out a way to make a simple bass kill switch that didn't need any power and worked at phono level. I designed the bass kill box you see here. Now I could show up at a gig and plug this box in between the turntable and the mixer to gain the ability to remove the bass in my records. The switch on the right remove all bass when activated. The two red buttons are momentary switches that allowed me to kill either the left or right bass channel. |
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The circuit is really simple and works quite well. The whole setup is a switch, a few caps and a couple resistors. When activated the caps filter the signal and the resistor drains the caps to ground to avoid overloading and getting sound pops. With the case the whole thing cost about 5 dollars to make per unit and saved my butt quite a few times at gigs. Showing up and wiring these things up at parties sure blew minds too. |
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The circuit is very simple. Here is the design for one channel.You need two per box. the signal comes from the table (1) to the input of the circuit and goes to the switch (2). There you decide if it goes to the cap (3) or straight to the mixer (4). The cap (3) filters the signal and removes the bass from the audio. From the cap the signal goes to the mixer (4). The resistor (5) is there to unload the cap and avoid getting pops when you engage the circuit. That's it. |
