Malo sam ceprkao i pronasao sledece:
http://users.chariot.net.au/~gmarts/ampbasic.htm
Use Instrument Speakers. Unlike hi-fi speakers, which are designed to keep the coil entirely within the magnetic field to maximise linearity, instrument speakers are designed to have the coil partially leave the magnetic field at the extremes of cone travel. This is partly to protect the speaker, but also produces a "soft-clipping" effect which is desirable with guitar amplifiers. It is also therefore important to match speaker power ratings reasonably closely with the power of the amplifier. Popular instrument speakers are available from Electro Voice (EV), Celestion and J B Lansing (JBL).
Koliko sam ja razumeo, Jedna razlika je u tome sto gitarski zvucnici bolje reaguju na dinamiku gitarskog signala, a druga razlika je u opsegu koji je prilagodjen gitarskom signalu kod gitarskog zvucnika sto rezultira, koliko sam razumeo, cistim zvukom, pogotovu kod distorziranog signala, jer se otsecaju nepozeljni harmonici... E, sad, jos samo da skontam STA i GDE se moze naci u Beogradu, pa i za koje pare...