Never heard of dbs - I presume you mean dB, but plural (which is still dB).

The short answer is that you need to know more. Decibels (dB) are only a ratio: ten times the common logarithm of the power ratio or 20 times the common logarithm of the voltage ratio. 30 dB is 1000 times the power or 31.4 times the voltage of whatever the original reference was as long as the impedance stays the same.

This can be a difficult subject to understand at first, but if you think of it as measuring multiplication instead of measuring power you get the idea.

i drove a vw 2010 2.0 turbo komfort the other day, it has 70,000 miles on it for 12,500 my budget is 11k could you recommend a car to buy?

shouldd i buy new car or used car?

i have 30k and i want to buy a car. which one is it good? i more like sedan that have everything like sonata 2015 limited, but I am open to any suggestion.

Always go bigger them you need, just in case you want to upgrade down the road. The last thing you want to do, is gut the vehicle, when all you had to do was un bolt an amp, or add another one. .

Not that I know of.

Buy one of those gagets that plugs into your cig lighter and plays MP3s from a thumb drive or SD card. These then play through your FM radio.

Put your "mix" on the thumb drive, plug it in, and you have your sounds. Probably cheaper than getting any cassette made.