amplifier 50w 20hz frequency responce

[swavvv]

Hi,

I have subwoofer of 50w 50hrz fs. Which apmlifier ic is suaitable for this, which operate on 14v? (TDA series)

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Sorry 60w subwoofer

 

[BradtheRad]

What ohm value is your speaker?

To get true 50W (continuous) with a 14V DC supply, your speaker needs to be 2 ohms, and you need to power it by bridging two IC's.

You'll get the most power from IC's which have very low internal impedance at the output. This means a high Watt rating.
Example, TDA7294 comes up in a search. 100W.

 

[swavvv]

Subwoofer 60w, rs= 50 hrz, 8ohm

 

[FvM]

Ohms law tells you that you need a higher power supply voltage than 14V, presuming you don't consider a bulky audio transformer.

All recent car audio systems have DC/DC converters for this reason.

 

[swavvv]

So what is value of transformer need for that (volt, amp).

 

[FvM]

Are you referring to the audio transformer solution? You should be sure to have an amplifier that actually produces 50 W with 14 V supply. Realistically the bridge amplipfier output impedance would be about 1 ohm. There's probably no suitable IC amplifier available.

The transformer has to be custom made, the core size is equal to a 150 or 200 W mains transformer.