I dig deep base and this delivers. I ordered a Sony field three and this Charge 6 to compare them. The Sony came defective - it had a flashing yellow light and refused to accept charging. Eager to run my test, I then went to Best Buy and got an another Sony and it worked fine so I could compare the two. I also took the opportunity at Best Buy to compare all the speakers in this size class that they had on display. The JBL is definitely better at delivering deep throbbing bass when you use the EQ in the app and raise the bass all the way up. Then you have to use a second EQ on the source side which in my case is the EQ in the Spotify app. Raising the base in Spotify along with the maxed out EQ base in the JBL results in great base -equivalent to the ULT mode on the Sony. But where the JBL outperforms is when you really crank up the volume it will give you great base without distortion whereas with the Sony turning up the volume in ULT mode will result in a lot of clipping on the base which is unlistenable. I compared the two over the course of several days and the JBL was the clear winner. Again the trick is to pre-EQ it for maximum base and then use the JBL app to set the in unit EQ to maximum base. I am a professional motion picture editor and have used JBL studio monitors for over 36 years, so when it comes to critical assessment of audio performance I know a thing or two! This little charge six continually amazes me with the depth of sound that comes out of such a tiny unit. Again, it is definitely better than the ULT field three from Sony. I did a lot of research before ordering these products for comparison and it is interesting that a lot of reviewers and AI results indicated that the Sony had better base, but I think what they are failing to realize is that when you want loud volume with no distorted base, the JBL is much better and when you set your pre-EQ and unit EQ for more base, it is equivalent and I think a bit better than the Sony at moderate volumes. Essentially using the JBL‘s internal EQ is like configuring your own custom ULT button on the Sony. Then my own personal preference is to pre-queue it in Spotify with even more base and it’s great! With no distortion! I’ve attached a couple of pictures that show my EQ settings. The algorithm that JBL is using to manage clipping at loud volumes is the best I’ve ever seen. I can turn the volume up to painful levels and it will not distort. This little thing performs so well that every day I can’t wait to grab it and go for a walk with my tunes blasting and it’s probably keeping me safe from the mountain lions and bears! Another plus for this speaker is that there is a YouTube video showing how to open it up and replace the battery, the process is very easy. However it appears we have to wait a while for replacement batteries to become available. Also, customer service is top-notch. I called at 8 o’clock on a Sunday morning because I got stuck doing the online registration process and got a very helpful person right away, they were in the Philippines or India I think. He acknowledged there was a bug and very patiently typed in all my information And then sent me a personal email with all of the confirming data. Very friendly, knowledgeable and efficient! - Footnote - yes I know how to spell bass, especially since I’m a musician, but obviously Siri’s dictation does not.

Awesome product by JBL. Rugged, easy to use, powerful and robust. By default, the mid frequencies are a little aggressive and unbalanced against the highs, but with the app, you can control this and adjust to your preferences. Surprising low end for such a compact speaker. Got this to use in the bathroom, so love the waterproof aspect. I feel this plays a significant role in the mild high frequencies (but can be adjusted).
No distortion at higher volumes.

Highly recommend if you need a rugged portable and loud speaker.