Select pro is the one I linked to. It's got different drivers than Motion Boom which we don't get in India. Might be good enough for your purposes. If you can find it with the option to return it if you're not happy. It comes with an EQ app so you can tweak the sound.
The latest one that can challenge the Onyx is the
Tribit Stormblast. The price was 17k a few days back. It's more of an outdoors speaker though. You will not need more than 40% volume indoors.
I figured this would concern you. It's disposable if you cannot replace the battery. But you can do it. Just that you have to do it on your own. You might be able to find some one to do it for you if you get the battery. Then its just a solder job.
You can replace the battery if you dismantle it. They mostly use 18650 batteries and have a protection circuit. You get batteries that come with protection circuits built in for torches already. This can take a bit of work depending on which speaker it is. The Onyx has crap battery life. There are people modding it by adding more batteries in parallel.
Search for desktop speakers that come with a subwoofer. Post what you find and we'll see if there are any reviews.
This will work out cheaper but then you're fixed to wherever you install them. If your phone does not have a headphone jack then you will need a dongle. AND you will need to get a BT transmitter to attach to it.
Something like
logitech Z623
Sound
test
Can you hear it ? that is what deep bass sounds like. This will compete if not beat the best BT options. 5 inch bass driver.
Listen to the Cons.
There is a cheaper
option by Sony but it CAN NOT compete with the Logitech Z623 for bass if you
listen to this shoot out
Another cheaper
option by Phillips. It's better than the Sony but not as
deep as the Logitech
Both Sony & Phillips have BT. Ignore them. GO with the logitech.
Understand how circles work. When you double the diameter you quadruple the area.
Select pro has 2x6cm drivers. This logitech has ONE 12cm driver. It will deliver deeper than 2xSelect pro speakers. The frequency response is 35 Hz to 2kHz. Plenty of bass there
It's 200W RMS is 4x more than the Onyx and twice as powerful as the Tribit.
If you are ok with the cons, this logitech is the best you can get for the money. Unless someone else wants to say otherwise.
Blindly go for it if you love the bass! and with little equalizer tweaks vocals sound amazing too.
www.amazon.in
There! only demo you need to hear