HELLO
I WANT TO AMPLIFY THE SOUND OF MOBILE PHONE FOR WCICH I AM USING LM380 2.5W AUDIO AMPLIFIER AND 8 OHMS/1W SPEAKER. WHEN I PLAY MUSIC FROM MOBILE PHONE THE SOUND QUALITY OF AMPLIFIER IS PERFECT
BUT WHEN I CONNECT TO A GSM PHONE CALL THE VOICE OF THE CALLER WHICH IS AMPLIFIED IS VERY BAD QUALITY THERE IS A LOT OF NOISE IN THE SPEAKER SO VOICE COULD NOT BE HEAR PROPERLY. SO PLEASE SUGGEST ME HOW CAN I GET NOISE FREE RESPONSE FROM AMPLIFIER DURING A GSM CALL

 

For a start, please type with proper grammer, i.e. lower case except when starting a sentece or for names, etc. All uppercase "talk" in forums is generally considered shouting.

As for your "problem", listen to the voice of the caller with the built-in speaker first. If it sounds crap with that, then the problem is the phone/tpye of connection, etc. Other than that, I don't really know what the problem could be, unless you're turning the amp up too far.