I'm trying to replicate a simple single bubble sonoluminescence (SBSL) experiment. I have several sources that I'm using for reference and my setup is pretty similar to the one here: http://techmind.org/sl/ but our lab does not have an amplifier. I have tested the circuit w/o one (just running the signal straight from the wave form generator) but it doesn't seem to have the voltage I need. I then tried a small lab amp (from Vernier) that we have several of, but it did strange things (clipping and changing the wave form from sine to triangle, etc. - it even made a weird, uneven square wave show up on the scope when the amp was turned OFF... idk, and neither did my profs), plus I knew before testing it that it is only rate at +/- 10V and I am shooting for closer to 30V peak to peak. I have seen people saying they have used an audio amp successfully for this application, but I worry about distortion. I have only rudimentary understanding of electronics but am teaching myself as much about it (as far as is relevant to this experiment) as I can, and, if I understand correctly, introducing proper inductance between the amplifier and the driver transducers should act like a high pass filter to help clean up the amplified signal. I have calculated the theoretical inductance for my setup (iirc ~30mH) and have some home made type inductors ready to test. Although I don't have a meter to measure inductance, it shouldn't be too hard to match it through trail and error. So, I am looking for a suitable amp and am having trouble finding one. Price is a concern. I don't know the exact budget at this time, but cheaper is better. Building one is not completely out of the question, but time is also a concern, so buying one is preferred. I'm not 100% on what specs I should be prioritizing because none of my references give much detail on the amp they used. The only firm stats I have seen concerning the amp is that ~30V peak to peak seems to be the goal. Most of what I'm seeing for sale is for stereo system application and doesn't even list the detailed specs that I'd like to see. I have found some low distortion amp boards with voltage ratings that are too low, but that have good distortion ratings (~0.006% or less) and I have seen audio amps with appropriate voltages but distortion ratings that I'm not sure would work (~4%). Any insights or suggestions would be appreciated greatly. I am also wondering if my basic understanding of the inductors acting as a high pass filter here is correct. The transducers I'm using are effectively acting as plate capacitors, which is how I was able to calculate the theoretical inductance needed. If I understand correctly, (excuse my simplistic wording, this isn't my field) the inductors will introduce a low impedance magnetic resistance to voltage spikes, which will help to keep the signal clean when properly matched to the circuit. Also, as I understand it, I can set the inductors up to be variable by having a ferrite rod that I can slide into.out of the center of the coil as needed as well as having 2 inductors, wired in series, that can be moved closer/farther apart to vary the total magnetic field strength. Clearly I could use some insights here as well... EDIT: After some reading on audio amps it seems I should be able to get away with using one so long as it is rated higher than what I will need. Problem is I'm having a hard time finding one with those ratings. I need a minimum of 30V peak to peak output that can handle at least 30kHz and as low distortion rating as I can find (<<1%). If anyone knows a good source for an amp like this please let me know.