Which version of TDA7492P should I use?

[Zerlen]

Hi,
I'm planning on building my own portable bluetooth speaker and i'm using 2x 30w(rms) Visaton FR-13-4 4ohm speakers. I was planning on buying TDA7492P amplifier, but should i get 25W+25W version or 50W+50W version?
My power source will probably be a power bank with 2A output with boost converter boosting 5V up to 12V or 16V.

Also what would be the pros and cons with these amps? Will the more powerful one produce more sound but is distorted or needs more power etc..?

Also if there are any better and cheap power sources then let me know!

I'm new to electronics so correct me if i'm wrong 🙂

 

[Keruskerfuerst]

You better use the 50+50W version.

 

[rayma]

My power source will probably be a power bank with 2A output with
boost converter boosting 5V up to 12V or 16V.

You should use a power source without a boost converter, since the converter
would reduce the current output by about the same factor that you gain in voltage.

The 16VDC supply with a BTL amp can give about 32W into a 4R load, which also
requires 2.8Arms. The 5V/2A supply boosted to 16V won't work, since the current
would be limited to about 0.7A peak.

Look for a 16V, 5A supply instead.

 

[Zerlen]

You should use a power source without a boost converter, since the converter
would reduce the current output by about the same factor that you gain in voltage.

The 16VDC supply with a BTL amp can give about 32W into a 4R load, which also
requires 2.8Arms. The 5V/2A supply boosted to 16V won't work, since the current
would be limited to about 0.7A peak.

Look for a 16V, 5A supply instead.

Would this work aswell? https://www.banggood.com/DC-12V-800...m-ion-Battery-Pack-p-969148.html?rmmds=search, my speaker should be portabe so a supply this size would really take alot of space and i don't expect full power from the speakers.
And is it true that when voltage gets higher and current lower, there will be less distorion but speakers are quieter but when voltage gets low and current higher then speakers are louder but more distorted?