I broke the 15' speaker of my polytone amplifier and changed it, but since I did not use the same speaker parts, the sound is not the same anymore. As a matter of fact, it is much worse! I live in Brasil and do not know how to find good components to make the substitution. Also, I cannot find any information on the internet about polytone dealers wich can send me the cone speaker. I'll apreciate any information that coul'd help me to find polytone parts or even any part that could match polytone specifications and substitute them. Thanks in advance, or as we say in Brasil, Agradecido, Alexandre.