John,
I am using a sub-woofer in my home music room and let me tell you it sure makes a difference. On the job however I do not use a separate sub. I cannot give you a recommended size, brand or power however. I have had mine for a number of years so what is current I could not say. However this is what I did when I purchased.
I listened at different stores to many different subs. All I can say is that I found quite a difference among them. Some amplified the base sounds. Some removed the higher frequencies. Then there were those that made my body feel the sound as well as my ears responding. I liked the total sound plus the feeling of my body sort of getting a massage from the inside out. In the end I guess it’s only what the pocket book can handle.
I have found that getting older has some benefits. The older I get I find the necessity for having a great deal of money for the future of less and less importance mainly because less and less future is left to look forward to. The benefit is that it frees up more and more cash to spend on the now.
Happy hunting, spending and playing.
Grandpa Doug with Ruthie sending a smile to you also.
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Grampa Doug