A 2.1 portable speaker bass is a bit quiet

[Elmadus]

Hi i have an Axel branded 2.1 portable speaker. It's quite large and doesn't have an bluetooth in it. Luckily it has a carrying hande for easier transportasion. It produces very loud sound and can work as a powerbank to charge a phone. The amp is attatched to the "dashboard" where i can control the volume, bass, and some playback buttons. It also has the charge port in it and a memory card slot. And i quite like it.

Here are some specs:

Size:
Height 26,7cm
Width 14cm
Lenght 28,5cm

Functions: Radio/USB/AUX/TF

Speaker power: 2x3w 4Ohm

Subwoofer power: 10w 4Ohm

Battery: 3.7v Li-Ion 3400mah
(original was 1000mah, but i've upgraded it )

Frequency: 100Hz - 20kHz

It works pretty well as intented, but the bass is bit quiet. When i crank up the volume, it doesn't distort, and the driver only moves a bit.

The sub is a downfiring 4.1 inch Dual Voice Coil driver, which is supported by a 2 inch wide bassport on the behind.

The speaker is also easily modifiable. Just taking off a few screws can reveal the amps electronics. Everything is connected with small connectors into the amps circuit board, so changing the wires is not a problem.

I've had it for some time now And it plays like the day i got it. If you can give me any suggestions on how to improve the bass of the speaker let me know. It cost only about 40 bucks so i won't be heartbroken if i break it.

Edit: Here are some pictures of the speaker:

http/postimg.org/image/xpwg37hjj/

http/postimg.org/image/4m886ytfz/

http/postimg.org/image/oodbbuu8f/

http/postimg.org/image/l8l72awzz/

http/postimg.org/image/rwhsowgi7/

http/postimg.org/image/w6wgkhllb/

http/postimg.org/image/9ttbbfa1b/

 

[getochkn]

Is there a question here?

 

[Elmadus]

I'm sorry if i didn't make it clear enough, but the question is, is there any ways to improve the bass of the speaker.

I also forgot to mension that the speakers "sub" lets trough mids and highs. Maybe i should add a low-pass filter into the sub?

 

[getochkn]

Probabnly not a lot, 4.1" is what it is.

 

[Elmadus]

Well yeah, that might be true. But still curious how can a bose soundlink mini then make 3 to 4 times more bass than this. Of course the brand and the quality is totally different, but still