While HB's knowledge is spot on, I believe you can get better bang - or boom- for your buck by replacing the factory speakers.

I have a 2017 Tundra, of which I have few complaints.  The factory system is one of them, though.  I did a little research, and the #1 problem seems to be cheap speakers with tiny magnets on the back of them.  The system as a whole clips off the lower and higher frequencies, and the upshot is that it sounds not much better than a Kraco from the 80s.  

My other car was a Lexus LS430 with a premium Mark Levinson system.  For those saying that a car isn't an ideal listening environment, I would invite them to take a ride in that thing.  It had a rear subwoofer as part of the design, which wasn't for "boom", but actually really helped balance out the low frequencies.  As HB mentioned, crossovers distribute the correct frequencies to the correct speakers.  In a subwoofer system, the subwoofer takes all the frequencies below a certain amount (say, everything less than 80 hz), allowing your other speakers to deliver sound with much less distortion.  As a few of you may remember, I'm one of those weird prog-rock fans, and can appreciate busy music that requires frequency responses from all ranges.  That vehicle made me get all my old CDs out to re-listen to, because I would always find some new notes I'd never heard before.

I would at least look at the speakers first before going into the dash.  If they obviously suck, Crutchfield sells upgrades at a price that won't break the bank and will sound a hell of a lot better.  Also, you don't need a lot of power to get great sound.  Don't get upsold on wattage.

You're right. I'm sure the factory head unit puts out good sound but the speakers are probably the cost cutter components in the system. I browsed Crutchfield last night for some possible replacement speakers for my truck. I think it sounds pretty good now, but it could use a little more. Some sound deadening would hurt either. The cab tends to echo a lot of road noise. 

Jags, if you go to the Crutchfield site, under the car audio link, you'll find a whole section on how to improve factory systems. It might be worth looking into.

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I’ll check it out. Thanks!

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