I am working on Active Noise Cancellation project.
For my project, I need a simple woofer(loudspeaker driver) to drive the microphone at one meter away for frequencies 50-250 Hz.
I have a 5" woofer in my lab. I designed amplifier and tested it, well it might be taking around 10 watt power(cant really increase more without distortion) but the sound reproduction is very poor, even when the microphone is too close, the waveform looks too bad.
Now I have to buy a woofer and decide on power amplifier to be used. Initially I was thinking, I might need driver size of around 8" and 30 Watt power but looking at this experience, I am kind of confused now.
My question is how much power is required to accurately reproduce the sound at 1 meter away microphone for 8" or 10" driver for 50-250 Hz frequencies?
Please suggest me if anyone has some experience.Thank you!
PS: I cant use subwoofer sets because of their size nor the sub woofer chassis as they are too costly for me.
EDIT: I have microphone ATR ATR3350 Omnidirectional Condenser Lavalier Microphone
and I am using LM1875 power audio amplifier with basic circuit given in the data sheet.