Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Does this have adjustable bass/treble or just presets?
Document: If you personally do not like hearing subs in someones car and would prefer not to have that kind of bass, than this is not for you. Only down side Ive noticed so far is how you cant turn the bass down. There is an XBASS which greatly enhances the bass effect, but there is not treble enhancer or bass decreaser which could be useful for any stereo.
This unit has reasonable bass for its price and mids/highs that are crisp and clear.
Best one I've had. Loud and really clear bass.Only thing I don't like is the need for the remote to access the iPod.
If you are planning on using an apple product or a USB then definitely buy this product but if you want to use the AUX connection then its a no. The sound quality is bad and the bass is not very powerfull...
Overall nice, probably more awesome if you have an IPOD. The bass that everyone says it has isn't all that. There is no custom sound adjust-ability, and that would be nice. It get super loud and is very clear.
I love this box. the only problem I have with it is that the audio in sucks,but there are ways around that. definitely worth the money. purchased a second unit directly after receiving the first one. awesome sound and solid bass.
This boombox has it all. If you love bass, this is the  unit for you. Love the portability. I am a boombox collector and have had them all. This one blows them out of the water. Works great with remote control. I love it so much I plan on buying another one. You can not beat the price.
As far as my laptop with max volume, bass cranked on equalizer, and X-Bass turned on on the GX-M10, the system barely put anything out for bass or sound at setting 20. It's the equivalent of when I have my iPhone in and on volume on 8. Whether it's to protect consumers from blowing speakers or not, this is a flaw in their design.
I purchased this system to put out on my front porch to play Halloween music for our annual &#34;haunted cemetery&#34; scene. The unit is BIG...much bigger than it appeared to me in the online photos. The bass is amazing...very deep, rich tones. It is surprising that a unit of this size can produce such strong bass.
both subwoofers are a joke, you litteraly feel your heart shaking. Those little sub put out the same bass as my dj set up. I read hundreds of reviews before buying this so take it from me who read every single one that your reading now and just buy the thing. If you want more info there are some great videos on youtube that compare this to other and you will see that it blows them all away. Have fun and enjoy
Answer: Just presets and then a Xtra Bass button that cranks the bass way up high. Seems to be fine. If more adjustment is needed it can be done on the iPod/iPhone.