Description: Surface transducers give you the awesome power to turn almost any surface into a speaker. They’re essentially just a speaker except instead of a cone, the coil is attached to a pad that conducts the vibration into whatever you press it against. Hook it up to an audio source and press it against the nearest table, wall or cardboard box. You can even put it against your head and play music directly into your skull (the ultimate surround sound).
Dimensions: 50mm in diameter, 31mm tall
Weight: 260 grams (0.5 lbs)
Based on 7 ratings:
6 of 6 found this helpful:
This guy is great, I wish it came with mounting holes for the head though. The head or “cone” unscrews, I had to drill a couple holes into this to mount it to my downhill helmet. This guy can take quite a bit of power, and if you mount it to your head via helmet like I did, it WILL shake your eyeballs to the bassier songs when the volume is turned up. I simply adjusted the EQ on my phone output and that problem went away. It is a little heavy on my head, and the steel spider is vulnerable if you crash, and near impossible to fix, so I don’t suggest using this as a helmet speaker for mountain biking. I still use it on my helmet, but I’ve got lighter, lower profile ones from Dayton Audio ready for a future implementation when I crash and ruin this last one I have.
Works great on posterboard as a speaker, and even better on honeycomb aluminum board. This is where it shines, permanently mount it to a “cone” and the body itself can screw into a hole - not sure what thread sizing it is - no datasheet info on that, would be great for a wall installation imo.
0 of 4 found this helpful:
Horrible experience, bought it for a try…big regrets ! it sounds as if he was locked in a box, really at the bottom of a well! and that, on all the surfaces can TRIED .. Maybe mine is defective ? works a little bit with my mobile phone but not amplified with a real amps :o
The surface transducers sound great with the right sized box, great lows, clear highs, and nice mids. With 2 you can get something surprisingly loud without losing quality of sound… only problem is buying them ( in my experience) is a game of chance, 2 of the 3 ive ordered came defective, sparkfun replaced 1 completely free and told my to keep the deffective one ( which it worked just fine just a stripped screw hole) and the second one the wire was damaged and pretty much broke off half way which i just soldered a new wire on. My advice is if you buy one/some add some gel type glue or hot glue from where the wire sticks out the back to relieve stress on the wire. Other then that i love them, they sound better than my stereo set
I bought one of these on a lark to play with and I am very interested to try making a lapidary drill out of it. Seems like it would be slower and less aggressive but also less complicated to build and drive than an ultrasonic drill, working on the same principle of bashing a solid bit into the work through abrasive slurry many times a second.
I’d rather keep the supplied plate though in case that hack doesn’t work out and I could go back to plan B of using it for its intended purpose.
I was unimpressed with the sound UNTIL I built a simple LM386 amp for it, now this little beauty screams. I power the amp with a 5v cell phone battery backup and can play tunes from my phone all day/night long at (up to) stupid volumes with the assistance of a file cabinet or other handy object to set it on.
When I received the transducer, one of the wires was broken so I had to disassemble it and resolder the wire. Also, the metal pad doesn’t screw in well, so the transducer doesn’t make a right angle with the surface. Other than that, it works well.
My application is for sound effects and voice, not music. Like any exciter the fidelity is strongly influenced by the material (and location) to which it is mounted. Volume is more than adequate when driven by BOB-11044 and mounted behind a 5 foot wide control panel made from 16 gage steel.