well, it works as should, but it doesnt have 100 W :-) ... maybe 20 ... there is no bass at all ... dont buy it if you want subwoofer ... bluetooth works fine, inline connection as well ... fm without antena doesnt work. all together its fine bluetooth speaker with low power. price is ok for such product :-)
the subwoofer can probably handle something better than the sound amplifier that came with it it draw about 6 to 8 watts at a medium sound and up to 12.5 watts when it's at the maximum sound output the speakers or speaker sound fine but the bass is somewhat weak it would only use about 12VDCx1amp which would explain the thin nickel coated wire that came with the 12VDC adapter i am disappointed since most car cigarette lighter can support up to 5 amps and this is extremely weak this is extremely misleading to mention it as a "100 watts" speakers
after further investigation, it does go up to 26 watts, so the average draw would be about 13 watts but it would still equal to 1-2 amp which is low compared to what the lighter plug can take which is 5 amp