Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: I have a factory 8 inch 2ohm as a subwoofer in my Lexus es300 now. Just wondering if I should stick with the same ohms and what's the difference ?
Document: I bought this as a replacement for a 2002 suburban subwoofer. The diameter is correct but its about 2&#34; deeper and will not fit in the factory box. I own lots of power tools and made it fit. It sounds better, but didn't make profound difference, I blame this on the factory stereo that I'm changing out today.This a very good, high quality speaker. If you buy it and intend on keeping the stock stereo, get an amp for it.
I couldn't be more pleased. Great power and sound for the price. I recently installed a new deck in my car and felt unimpressed with the cabin speakers lack of depth. I installed this sub along with the Boss R1100M amp, Boss 8 gauge installation kit and Monster Cable 12 gauge subwoofer wire (a bit overkill) for a total of under $180 and the difference in my vehicle is night and day.
I purchased this Subwoofer for my wife's 2005 Mitsubishi Montero Limited since it has the factory Infinity system with the 8" sub in the back.First of all getting it the panels off is not a big deal if you are at all mechanically inclined. It literally only takes 10 minutes once you have done it the first time to know where all the screws are (total of 6 on the bottom panel and 2 on the grab handle on the top panel).
This 8 inch subwoofer rocks. I used it to replace the sub  that blew up it my bad-zooka. It was a bit of a squeeze to get it in the box, but I did prevail. What a rocking good sub. It was much better than the original product in the Bazooka. The instructions  said it should be a closed box, the bazooka is vented. It sounds excellent to me. For 50$ with free shipping, how can you go wrong? Infinity is the best.
This subwoofer has excellent quality and surprisingly strong bass for such a small sub. My car came with 4" component speakers, and I needed this to replace the sub in the factory subwoofer location. The audio system in my car depends on the subwoofer for not only deep bass, but for midrange bass as well. The sound quality of this woofer from 400 Hz down is great. For the rather low price of this sub, you can't go wrong.
With almost an inch of cone travel, this sub moves a LOT of air. The smooth response in the sealed enclosure allows me to set the crossover at 125 Hz for a little extra 'grunt' without it sounding 'flabby'.I built a sealed .35 cu.ft. enclosure that is driven with 250 watts. A Pioneer DEH-500UB head unit powers 4 factory door and dash speakers.
After listening to this 8" for a couple weeks, I put the 10" back in. There was a world of difference, as the Pioneer in the sealed box blew it away. It was deeper, had more punch, and I could feel the low bass notes. Anyway, I realize that there is a difference between an 8" and a 10", but modeling software showed the Infinity playing down to 30Hz, while the Pioneer was supposed to be down 3db at 50Hz.
I bought this subwoofer early last year and it has been in 3 of my vehicles now! First off, I figured for $50 and being only an 8" subwoofer it wasn't going to be very powerful, boy was I wrong. This thing has great sound reproduction when tuned in properly. I have this installed in a custom tube shaped bandpass box with a 1000 watt amp and it's very clear and can still make all the mirrors shake if you want to get obnoxious.
Regarding This little gem of a subwoofer, I can tell you that it is worth every penny!!! A few months ago I installed a complete system in a regular cab Ford ranger for one of my best friends. There was very little room behind the seat so we needed a Sub that worked in a small enclosure. This infinity met our needs. I built a custom enclosure for one 8&#34; sub and amp.
Has taken all the power i needed for a 8 inch old tube. with small amp. I made a car stock sound so much better.
Answer: If your not changing the amp stick with the same ohm. Otherwise it might sound like crap  or worse and blow something.