after market speakers
 

Can I get decent quality sound without changing the factory radio ,just the speakers? Which kind of speakers work good with the factory set up?

Is it the Bose system?

If so, it's a bit tricky. I'm no audio pro but, I believe it's explained in a 'sticky' thread in this section.

Good luck.

And yes, You can get better sound just replacing the factory speakers.

did 10' nismos have the bose option? as Ron mentioned above, or just replace dat lame HU with a modern one from pioneer. carplay and all.

In my opinion...no.
I tried to go in cheap...and piece it together in a phase approach...but never reached what I truly wanted until I ended up replacing the entire system. I started off with a new HU...which was good, but still lame. Added an single Channel amp and JL Audio sub...solid improvement. I then thought that replacing the 6.5 inch Polk door speakers and tweeters would help...I actually went backwards. Needed to match the new Polk speakers with the proper power to make them really sing. An addition 2 channel amp feeding the Polk Speakers with 100W RMS...and pow...no I have an awesome system. $1800 later...I now have a system that exceeds my expectations.

'10 Nismo's didn't have really any option, including any bose option. (I think they added it in 15)

To the OP yes aftermarket will be better, alot better, then then bose. You'd be even better off though with even just a mid range head unit, amp, with upgraded speakers but I don't know what your budget is like.

I did the head unit first and it was nice for some of the modern features that are missing with the base unit but the most noticible thing was with upgraded speakers that had a proper tweeter. The stock system just cannot produce the highs.

If you're going to stick with head unit power, you'l be restricted to the lower range of speakers.. I personally tried a set of Infinity Reference components (I had them on an amp ... but they are probably in the proper class) and I actually disliked them compared to the crappy OEM speakers. Right now I am running the OEM speakers with a Pioneer Headunit in "Network Mode*" and to tell you the truth, I am actually happy with it and probably will stick with them for a while. I am not an audiophile though, so your mileage may vary.

Network Mode: Allows me to re-purpose the unused rear 22w channels for the door speakers and get the front 22w channels for the dash speakers. The headunit has crossover functionality and I have the speakers crossed at 8khz.

The stock 6.5" woofers are so **** that anything else will give you better quality. Changing both the speakers and the head unit is the best option and gives you the option to add a subwoofer in later on if you decide you want to.

No not really, your stock unit puts out around 9 watts RMS any good new component set is going to need at least 20 watts +. You'll actually get better sound by upgrading the head unit first.

Wow 9w. So there is pretty much no upgrade path without changing the headunit or adding an amp.

Not the OP's original question. He did not mention Amplifier upgrades, Subwoofers, or component speakers. It was a simple question....Better sound with aftermarket speakers.
The answer is Yes, No question, No Debate.
Not everyone wants to Go Balls to the wall.

Doesn't need to be balls for the wall, will the sound improve? Somewhat but a lot of times people will actually loose a fair bit of bass response because the woofers can't be driven as efficiently even with a higher DB sensitivity speaker.

SQ will not improve. Nothing very noticeable. Headunit doesn't have enough power output to make a huge difference even if you change out speakers. Get a cute little amplifier and you'll thank yourself later.

Just one of a million quotes on the subject.... This one from Livewire.com "If you want to squeeze the best possible sound out of your factory sound system, and you don’t have an enormous budget, the speakers are a great place to start. Most OEM systems use “full range” speakers, which is a fancy way of saying that each speaker has a single driver that’s responsible for producing the entire audio spectrum, or at least as much of it as a relatively compact car speaker can..The advantage is that full range speakers are comparatively cheap and take up less space than individual component speakers, but you end up paying elsewhere with muddier sound. If you replace car speakers that fall into the "full range" category with 2-way or 3-way speakers that have multiple drivers, or even individual component speakers, the difference in sound quality can be remarkable."
Take it at face value, I guess, and do a little legitimate research, form your own conclusions....

You. I like you.