He went on to become part of the King's Harmonica Quintet which has played many prestigious concerts, including in front of an audience of twenty thousand, as part of the 2008 Beijing Olympics torch procession and winning the group competition at the World Harmonica Championship in Trossingen. Harmonica is taught in many schools there, which is how Rocky got started playing himself almost 50 years ago. It would be a shame to have someone kick the cone by mistake and destroy your hard work.Rocky lives in Hong Kong, where there is a vibrant harmonica scene. The one downside? The speaker cone is fragile, so it’s a good idea to store it somewhere up high or in a cabinet when it’s not being used. It takes a lot of air pressure to move that big diaphragm, so you can place it half an inch from a thundering bass drum or speaker cabinet without clipping. Lastly, the mic’s natural input gain is low. Second, this mic “hears” almost no treble, so even on a drum set there will be a ridiculously small amount of bleed from the snare and cymbals. First, the huge diameter of the diaphragm admits tons of low-frequency response. As an alternative, if you’re skilled with a circular saw, you can just cut off the portion of the original speaker cabinet that had your woofer mounted in it originally, drilling a hole in the box for the microphone cable to pass through.īesides being cheap and easily constructed, this mic has three very serious advantages over store-bought mics. If a bandmate can sit or step on this structure without breaking it, you’ve done your job. When working, be extremely careful not to puncture the cone of the speaker with your tools! Screw it together firmly, using more hardware than you think you’ll need. You can get creative with this step and use whatever might work. It doesn’t need to be pretty, but it does need to be secure and strong. Find some scrap wood and use the speaker’s mounting screws to construct a simple frame that allows the mic to stand up. Obviously, you can’t keep holding your new mic up in front of sound sources. Build a frame or box so your mic can stand up Now seal up those wire connections with more tape so they’re secure. If you’re getting a good signal with no buzz or static, you’ve done the first two steps correctly. Try holding it up in front of a bass drum, bass guitar, or any instrument with a lot of low end. If you don’t have any wire nuts handy, just wrap the joints in a very short length of electrical tape.īefore doing any more work, plug your mic into a phantom-powered mixing board and test it. Once they’re twisted together, you’ll want to screw a plastic wire nut onto the joined wires to keep them together and prevent them from grounding out on any other metal. Then join the red speaker wire to the white wire from the cable. Twist the black wire from the speaker to the black wire on the cable. As before, strip a little insulation from the black and white wires. Using your pliers, carefully remove the wires from the terminals. Of the wires attached to these terminals, one wire will typically be white and another black (the grey one is a ground wire, which we won’t need). The metal housing slides off, revealing three soldered terminals. Remove the screw from the female end of a microphone cable. Don’t throw away the screws you just took out you’ll need them later.Ģ. You now have the giant diaphragm of your low-frequency microphone. Now, strip about a half an inch of plastic insulation off the cut ends of the wires, being careful not to cut the metal threads inside. Cut these wires where they attach to the interior of the speaker box, leaving as much slack attached to the cone as possible. Once you have the cone of the speaker out, you’ll see two wires, most likely red and black, attached to the cone. Remove the speaker grill, if it has one, and unscrew the four screws that hold the woofer in the cabinet. From an article Written by Jesse Sterling Harrison how to turn an old speaker into a low frequency mic for anyone who is intetested
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