Should I get professional installation for my subwoofer/amp?

[Spoole9]

I don't have a lot of mechanical experience, although I installed my own head unit recently. I'm putting a 10'' Kicker sub w/ enclosure and an amp (probably under passengers seat) into my 2007 Toyota Corolla. The sub gets 250 RMS, which suits my needs. I really want to avoid the rattling I hear in some of my friends vehicles from their subs. Since they mainly did their own installs, I'm thinking I might be better off with a professional install.

Installation fee is $100. Do you think it's a good idea?

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