hmm..sorry to say..s4.1 is not for basshead...(i owned s2.1d..n i kinda dissapointed too)

Want bass like car subwoofer...for sure S4.1 is not for that...
Is for more on gaming..
Give one more chance for Edifier and try out the S2.1MKII...bass powerful until you will feel your shirt shaking...
10"inch with passive radiator....

Here are your guides:

1. Go to the car speaker shop and buy a powerful 6.5" woofer and change it with the S4.1 subwoofer. Watt doesn't matter, it just the maximum rating anyway. Anything higher the the S4.1 subwoofer 60W is ok.

2. Change the 35V 4700uF capacitors to 10000uF minimum 35V. I think capacitor's brand doesn't matter much if u just want more bass. (Of course branded is better)

3. Add some sound absorpting cotton or sponge in the subwoofer.

4. Getting a Phillip PSC805 also a good idea, the soundcard bass is strong.
Personally, I don't prefer bass. I'm using PSC805 with my modded S4.1 currently. I moded my S4.1 to get clearer and harder bass and improve the clarity of the mid. Now the LFE of my S4.1 controller need to turn to minimum and lower the bass frequency in equalizer of foobar to get the bass that i prefered while enjoying music. 

I think Edifier S4.1 is built with clarity in mind, it's the clarity the stand out among it's price range.
Have a nice try to unleash the beast of your S4.1 subwoofer.

Here are your guides:

1. Go to the car speaker shop and buy a powerful 6.5" woofer and change it with the S4.1 subwoofer. Watt doesn't matter, it just the maximum rating anyway. Anything higher the the S4.1 subwoofer 60W is ok.

2. Change the 35V 4700uF capacitors to 10000uF minimum 35V. I think capacitor's brand doesn't matter much if u just want more bass. (Of course branded is better)

3. Add some sound absorpting cotton or sponge in the subwoofer.

4. Getting a Phillip PSC805 also a good idea, the soundcard bass is strong.
Personally, I don't prefer bass. I'm using PSC805 with my modded S4.1 currently. I moded my S4.1 to get clearer and harder bass and improve the clarity of the mid. Now the LFE of my S4.1 controller need to turn to minimum and lower the bass frequency in equalizer of foobar to get the bass that i prefered while enjoying music. 

I think Edifier S4.1 is built with clarity in mind, it's the clarity the stand out among it's price range.
Have a nice try to unleash the beast of your S4.1 subwoofer.

Here are your guides:

1. Go to the car speaker shop and buy a powerful 6.5" woofer and change it with the S4.1 subwoofer. Watt doesn't matter, it just the maximum rating anyway. Anything higher the the S4.1 subwoofer 60W is ok.

2. Change the 35V 4700uF capacitors to 10000uF minimum 35V. I think capacitor's brand doesn't matter much if u just want more bass. (Of course branded is better)

3. Add some sound absorpting cotton or sponge in the subwoofer.

4. Getting a Phillip PSC805 also a good idea, the soundcard bass is strong.
Personally, I don't prefer bass. I'm using PSC805 with my modded S4.1 currently. I moded my S4.1 to get clearer and harder bass and improve the clarity of the mid. Now the LFE of my S4.1 controller need to turn to minimum and lower the bass frequency in equalizer of foobar to get the bass that i prefered while enjoying music. 

I think Edifier S4.1 is built with clarity in mind, it's the clarity the stand out among it's price range.
Have a nice try to unleash the beast of your S4.1 subwoofer.

Tai ko...I'm a basshead too..but I love like Adams?Digital and tomahawk demo car...I feel like flying when they blast....the speaker can say super duper..wor...out topic liao...

So if you want bass choose S2.1mkII,
If me, that still not enough..my speaker is 10"..got two la...still not enough..
No need change...6.5 inch sub bass wont powerful than the 10 inch ma...
Buy S2.1MkII...